ex Reduction of protein phosphatase 2A (PP2A) complexity reveals cellular functions and dephosphorylation motifs of the PP2A/B'{delta} holoenzyme [Enzymology] By feedproxy.google.com Published On :: 2020-04-24T06:08:45-07:00 Protein phosphatase 2A (PP2A) is a large enzyme family responsible for most cellular Ser/Thr dephosphorylation events. PP2A substrate specificity, localization, and regulation by second messengers rely on more than a dozen regulatory subunits (including B/R2, B'/R5, and B″/R3), which form the PP2A heterotrimeric holoenzyme by associating with a dimer comprising scaffolding (A) and catalytic (C) subunits. Because of partial redundancy and high endogenous expression of PP2A holoenzymes, traditional approaches of overexpressing, knocking down, or knocking out PP2A regulatory subunits have yielded only limited insights into their biological roles and substrates. To this end, here we sought to reduce the complexity of cellular PP2A holoenzymes. We used tetracycline-inducible expression of pairs of scaffolding and regulatory subunits with complementary charge-reversal substitutions in their interaction interfaces. For each of the three regulatory subunit families, we engineered A/B charge–swap variants that could bind to one another, but not to endogenous A and B subunits. Because endogenous Aα was targeted by a co-induced shRNA, endogenous B subunits were rapidly degraded, resulting in expression of predominantly a single PP2A heterotrimer composed of the A/B charge–swap pair and the endogenous catalytic subunit. Using B'δ/PPP2R5D, we show that PP2A complexity reduction, but not PP2A overexpression, reveals a role of this holoenzyme in suppression of extracellular signal–regulated kinase signaling and protein kinase A substrate dephosphorylation. When combined with global phosphoproteomics, the PP2A/B'δ reduction approach identified consensus dephosphorylation motifs in its substrates and suggested that residues surrounding the phosphorylation site play roles in PP2A substrate specificity. Full Article
ex Biophysical characterization of SARAH domain-mediated multimerization of Hippo pathway complexes in Drosophila [Signal Transduction] By feedproxy.google.com Published On :: 2020-05-01T00:06:09-07:00 Hippo pathway signaling limits cell growth and proliferation and maintains the stem-cell niche. These cellular events result from the coordinated activity of a core kinase cassette that is regulated, in part, by interactions involving Hippo, Salvador, and dRassF. These interactions are mediated by a conserved coiled-coil domain, termed SARAH, in each of these proteins. SARAH domain–mediated homodimerization of Hippo kinase leads to autophosphorylation and activation. Paradoxically, SARAH domain–mediated heterodimerization between Hippo and Salvador enhances Hippo kinase activity in cells, whereas complex formation with dRassF inhibits it. To better understand the mechanism by which each complex distinctly modulates Hippo kinase and pathway activity, here we biophysically characterized the entire suite of SARAH domain–mediated complexes. We purified the three SARAH domains from Drosophila melanogaster and performed an unbiased pulldown assay to identify all possible interactions, revealing that isolated SARAH domains are sufficient to recapitulate the cellular assemblies and that Hippo is a universal binding partner. Additionally, we found that the Salvador SARAH domain homodimerizes and demonstrate that this interaction is conserved in Salvador's mammalian homolog. Using native MS, we show that each of these complexes is dimeric in solution. We also measured the stability of each SARAH domain complex, finding that despite similarities at both the sequence and structural levels, SARAH domain complexes differ in stability. The identity, stoichiometry, and stability of these interactions characterized here comprehensively reveal the nature of SARAH domain–mediated complex formation and provide mechanistic insights into how SARAH domain–mediated interactions influence Hippo pathway activity. Full Article
ex Mechanistic insights explain the transforming potential of the T507K substitution in the protein-tyrosine phosphatase SHP2 [Signal Transduction] By feedproxy.google.com Published On :: 2020-05-01T00:06:09-07:00 The protein-tyrosine phosphatase SHP2 is an allosteric enzyme critical for cellular events downstream of growth factor receptors. Mutations in the SHP2 gene have been linked to many different types of human diseases, including developmental disorders, leukemia, and solid tumors. Unlike most SHP2-activating mutations, the T507K substitution in SHP2 is unique in that it exhibits oncogenic Ras-like transforming activity. However, the biochemical basis of how the SHP2/T507K variant elicits transformation remains unclear. By combining kinetic and biophysical methods, X-ray crystallography, and molecular modeling, as well as using cell biology approaches, here we uncovered that the T507K substitution alters both SHP2 substrate specificity and its allosteric regulatory mechanism. We found that although SHP2/T507K exists in the closed, autoinhibited conformation similar to the WT enzyme, the interactions between its N-SH2 and protein-tyrosine phosphatase domains are weakened such that SHP2/T507K possesses a higher affinity for the scaffolding protein Grb2-associated binding protein 1 (Gab1). We also discovered that the T507K substitution alters the structure of the SHP2 active site, resulting in a change in SHP2 substrate preference for Sprouty1, a known negative regulator of Ras signaling and a potential tumor suppressor. Our results suggest that SHP2/T507K's shift in substrate specificity coupled with its preferential association of SHP2/T507K with Gab1 enable the mutant SHP2 to more efficiently dephosphorylate Sprouty1 at pTyr-53. This dephosphorylation hyperactivates Ras signaling, which is likely responsible for SHP2/T507K's Ras-like transforming activity. Full Article
ex Five Foreign Policy Questions for the UK’s Next Prime Minister By feedproxy.google.com Published On :: Tue, 18 Jun 2019 15:59:46 +0000 18 June 2019 Thomas Raines Director, Europe Programme @TomHRaines Google Scholar Even if most don’t get to vote in the Conservative leadership election, the public deserves serious answers on the foreign policy plans of those who want to lead the country. 2019-06-18-10D.jpg 10 Downing Street. Photo: Getty Images. In a month’s time, the UK will have a new prime minister. The campaign has been dominated by candidates’ views on how to deliver Britain’s withdrawal from the EU by October, alongside some discussion of domestic issues.But relatively little has been said about international affairs, despite the fact that foreign policy questions are becoming a more partisan issue and Britain is facing crucial questions around Brexit and the wider international context. These will be waiting for whoever finds themselves in Number 10 on 22 July. 1. How can Britain influence Europe from outside the EU?Theresa May was fond of saying that Britain is leaving the EU but not leaving Europe. Britain cannot change its geography. It will continue to share many strategic and security interests with the rest of the continent, but it will be outside of Europe’s central political and economic project. A new PM will not only have to negotiate Britain’s new relationship with the EU, but also think about how to influence it as a third country.An aspect of this will be finding a new way to work with the EU on foreign, security and defence policy that meets the need for autonomy on both sides. How deep this relationship is or how institutionalized it will be is yet to be negotiated and can be shaped by the next PM.The UK needs to decide how ambitiously it wants to engage with the new defence agenda in the EU (particularly its industrial components), and how to balance these with key bilateral relationships like France and Germany. Amid uncertainty about American security guarantees and Russian aggression, the next PM must also consider what Britain’s security role in Europe should be and NATO’s place within that.Beyond conventional foreign policy issues, Britain is also going to be heavily shaped and influenced by the rule-making power of the EU, and how the world’s largest market regulates itself, from energy to financial services, consumer products and the environment.The UK will need a strategy to influence the EU from the outside – something Swiss, Norwegians and Americans will acknowledge is no easy feat. This could include significantly increasing its diplomatic footprint across Europe, working closely with the UK’s private and non-profit sectors, utilizing Britain’s technical expertise in areas like sanctions, and creating new ad hoc groupings to share perspectives and ideas, building on examples like the Northern Future Forum. 2. Should Britain do business with President Trump?President Trump represents a fundamental challenge to Britain: an American president whose belligerent unilateralism runs counter to many of Britain’s foreign policy objectives. His frequent and often shameless diplomatic faux pas – from proposing Nigel Farage be the British ambassador to his dog-whistle attacks on the mayor of London – are compounded by real differences of substance on issues like trade, climate change and nuclear non-proliferation.A new prime minister must decide how to manage relations with the US administration, whether to challenge or condemn a US president when he acts against Britain’s interests, or use flattery or quieter diplomacy to seek to influence him. Theresa May’s strategy of staying politically close to the president and playing to his ego has yielded little in policy terms, though other world leaders have fared little better.A new PM will face some uncomfortable choices. Will they continue to defend the Iran nuclear deal alongside European allies while the US continues to undermine it? Do they believe a trade deal with America is desirable or achievable with the current administration, and what are they willing to sacrifice to achieve it? Is the American security guarantee for Europe secure with Donald Trump as president? Judgements on these questions should inform Britain's wider strategy, and its objectives for a future relationship with the European Union.3. Should Britain prioritize economics or security in its relations with China?Britain faces its own version of the challenge that many countries face – how to balance the economic and investment benefits of a positive relationship with China with concerns about repressive domestic politics and a more assertive Chinese role regionally and globally. This tension has become more acute for two reasons.First, the economic dislocation of leaving the EU may create a greater reliance on Chinese trade and investment. China is already a major investor in the UK. If Brexit proves to be disorderly, Britain’s need may be all the greater (though China faces economic headwinds as well). Some in Brussels even fear that the economic difficulties of Brexit may make the UK a soft touch for emerging powers from which it seeks inward investment and market access.Second, the deterioration in US–China relations means the UK may come under increasing pressure from the United States to take a tough line with China. The controversy over Huawei’s role in delivering 5G networks may become a more regular feature of transatlantic debates, with Britain facing Chinese economic pressure on one side and a squeeze from America over security issues on the other, without the weight of the EU behind it. A new prime minister should consider whether the UK’s interests are served by a security role in east Asia, and whether it has the capability to play one.The UK remains a party to the Five Power Defence Arrangements. The Royal Navy has conducted freedom of navigation exercises in the South China Sea, prompting a rebuke from Beijing. It has also taken steps to deepen security ties with Japan.But the UK government has struggled to present a coherent position. Some cabinet ministers have sought to open doors to the Chinese market at the same time as others announced their intentions to send aircraft carriers to the Pacific. The next PM will need to find a balance between China and the US, or accept the consequences of more directly taking sides on disputes about trade, technology, and security.4. How can the contradictions between UK foreign and domestic policy be reconciled?One of the many problems with the vague and unhelpful slogan ‘Global Britain’ is how it jars with many aspects of domestic policy. This incoherence reduces Britain’s foreign policy credibility and effectiveness.Britain has actively supported the UN-led Yemen peace process while continuing to support Saudi Arabia’s military campaign through arms sales. Britain wants to build a new ambitious independent trade policy while restricting the migration that is crucial for services trade. British foreign secretaries trumpet the UK’s soft power while the Home Office deports members of the Windrush generation, bungles EU citizenship applications and sets unreasonable burdens for many people seeking visas simply to visit the country.Global universities are celebrated while international students had their post-study visas cut (a policy that sensibly is likely to be reversed). Britain advocates international tax compliance and transparency while not taking robust steps to regulate the tax haven role played by crown dependencies and overseas territories.A new prime minister has the chance to get to grips with these inconsistencies and develop foreign and domestic policies which are more coherent and self-re-enforcing.5. At what level should Britain’s international ambitions be funded?Successive governments have celebrated the fact the UK is the only Western country to spend 2% of GDP on defence and 0.7% on development. However, this masks some real pressures in the system.There are significant problems in the defence budget and a growing gap between commitments and committed funds. Meanwhile, the funding of Britain’s diplomacy has been cut by successive governments – Labour, Conservative and coalition – for much of the last 20 years. Numerous bodies have highlighted the problems facing the overstretched and underfunded Foreign Office. Where would defence and diplomacy sit in the new prime minister’s hierarchy of priorities?The problem is not purely one of funding, but the gap between ambitions, rhetoric and resources. It is not sustainable for British ministers to trumpet Britain’s global ambitions while not properly funding the tools of its influence abroad.It would be reasonable and understandable for a new prime minister to adjust that ambition and tone down the rhetoric, or alternatively to address resource pressures by investing in diplomacy and defence. But that choice should be informed by a sober reflection on Britain’s international position and interests as it leaves the EU. Brexit offers a chance to revisit assumptions that have guided British policy for a generation. A new prime minister should seize this opportunity.A realistic vision for the futureAll these issues will be more pronounced if the UK leaves the EU with no deal at the end of October. ‘No deal’ would be not simply an economic shock but a diplomatic rupture that will colour the UK’s capacity to negotiate a new relationship with the EU, which will be the first order of business after a ‘no deal’ exit. Trust will be in short supply.Even if they don’t get to vote on the new prime minister, the public deserves serious answers to these and other questions from the men who want to lead the country. Not the platitudes of ‘Global Britain’ or a reflexive and unexamined British exceptionalism, but a serious, realistic assessment of how Britain will cope with the disruptions of leaving the EU and how it might thrive outside the regional bloc it has been a part of for more than 45 years. Full Article
ex EU Security Ambitions Are Hostage to the Brexit Process By feedproxy.google.com Published On :: Fri, 21 Jun 2019 11:46:55 +0000 25 June 2019 Professor Richard G Whitman Associate Fellow, Europe Programme @RGWhitman Google Scholar The EU faces a fundamental contradiction in its goals to become more strategically autonomous in defence matters. 2019-06-20-Eurocorps.jpg Soldiers of a Eurocorps detachment raise the EU flag at the European Parliament in Strasbourg. Photo: Getty Images. Three years ago, as the UK was holding its referendum on Brexit, the EU was rolling out its Global Strategy for a more cohesive and effective security and defence policy. Since then, EU member states have set impressive goals and, as significantly, taken important practical steps to make an EU defence capability a tangible proposition, despite differing collective defence commitments, traditions of neutrality among some member states and very different strategic cultures.All of these developments have taken place with the UK as reluctant observer. The UK has been traditionally hostile to a deepening of defence collaboration within the EU (and consistent of the view that Europe’s military security was best provided through NATO). But the Brexit referendum vote has placed the UK as a bystander as EU security and defence initiatives have been pursued which have overridden the past red lines of British governments.There is, however, a Brexit-related paradox in all these developments.A central goal of the security and defence-related aspects of the EU Global Strategy is for the EU to have the capacity to act independently of the United States and, through indigenous defence industries, the ability to produce the means to make that possible.With the UK outside the EU, and its opposition absent, it is easier to create a political consensus to push for more defence integration. But without the UK there are diminished collective defence capabilities which would make European strategic autonomy much harder to achieve. The May government has been an enthusiast for preserving close security and defence cooperation with the EU. The Withdrawal Agreement and the Political Declaration both seek to provide for a close EU–UK relationship post-Brexit.However, the Article 50 negotiations have made clear that the EU’s institutions are hostile to special treatment for the UK beyond that normally accorded to a third country. Disagreements over the terms of the UK’s continuing participation in the Gailleo dual-use satellite system, which has a significant security and defence utility, have signalled that there is a strong lobby in Brussels and some national capitals seeking to significantly circumscribe collaboration with Britain.The scale and capabilities of the UK’s military, its defence expenditure (notably on defence research and development) and its defence industrial base make any British decoupling from the EU’s security and defence a major issue. Disconnecting the UK from EU developments entirely would be a costly political choice for both sides.And excluding the UK from new initiatives in defence R&D and new defence procurement arrangements would be suboptimal in delivering a stronger European defence, technological and industrial base. Duplicating existing UK capabilities, especially strategic enablers such as strategic airlift, target acquisition and intelligence, surveillance and reconnaissance capabilities, would be an unnecessary squandering of already hard-pressed European defence budgets.At present the common procurement and defence industry plans driven by the EU Global Strategy are embryonic. And significant defence capability decisions are taking place detached from the EU’s plans, which could reinforce a divide between the UK and other member states.As illustrative, the formal agreement this week between France, Germany and Spain on the Future Combat Air System (FCAS) to develop a next-generation stealth fighter is competing with the UK-supported Tempest project that shares the same objective. The 20-year timescales for the delivery of the FCAS and Tempest projects are a reminder that defence procurement decisions are of multi-decade significance.As the EU’s ambitions are nascent, it is too early to fully assess what might be the impact of any decision by the EU and the UK to keep each other at an arms-length in security and defence cooperation. With a more detached relationship, the UK will have significant concerns if it sees the EU’s common procurement arrangements develop in a manner that actively discriminates against the UK defence industry.Outside of procurement and defence issues there may be other areas of future concern for the UK – for example, the extent to which the EU might deepen and broaden cooperation with NATO in a manner that makes the collective influence of EU member states within NATO more apparent, or to which the footprint of future EU conflict and security activities in third countries starts to overshadow the activities of the UK.As the UK has been grappling with Brexit domestically, the EU has been evolving its security and defence policy ambitions. These are developments that will impact on the UK and in which, therefore, it has a stake but as a departing member state it has a weakening ability to shape.Any aspect of future EU–UK cooperation is hostage to the vagaries of how the Brexit endgame concludes. Full Article
ex Brexit, Party Politics and the Next Prime Minister By feedproxy.google.com Published On :: Fri, 28 Jun 2019 13:45:01 +0000 Invitation Only Research Event 15 July 2019 - 8:30am to 9:30am Chatham House | 10 St James's Square | London | SW1Y 4LE Event participants Daniel Finkelstein OBE, Associate Editor, The Times; Conservative Member of the House of Lords; Chairman, Onward Chair: Thomas Raines, Head, Europe Programme, Chatham House With the new leader of the Conservative party due to be announced on 23 July, what are the prospects for the party and the country?On Brexit, the new prime minister faces most of the same challenges and constraints as Theresa May. The leadership contenders have outlined their ambitions for a revised deal, but with the EU insisting negotiations are over, their room for manoeuvre appears to be limited. Furthermore, even with a new leader at the helm, important divisions remain among voters about what shape Brexit and the future UK-EU relationship should take. If the EU won’t change the deal, and parliament won’t accept it, how can the deadlock be broken? Is a 'No Deal' Brexit politically deliverable? Or could there be a general election later in 2019? Can the Conservative party survive a pre-Brexit election intact?Beyond Brexit, what are the other choices, in both domestic and foreign policy, facing the next prime minister? How might the decisions he makes affect the future of the party and British politics more broadly?In this session, the speaker will share his reflections on the likely result of the leadership election, and what lies beyond it.Attendance at this event is by invitation only. Event attributes Chatham House Rule Department/project Europe Programme, Britain and Europe: The Post-Referendum Agenda Alina Lyadova Europe Programme Coordinator Email Full Article
ex The Future of Brexit, Britain and Boris By feedproxy.google.com Published On :: Wed, 02 Oct 2019 12:15:01 +0000 Invitation Only Research Event 17 October 2019 - 8:30am to 9:30am Chatham House | 10 St James's Square | London | SW1Y 4LE Event participants Philip Rycroft, Permanent Secretary, Department for Exiting the EU (2017-19)Chair: Tom Raines, Head, Europe Programme, Chatham House Once again, Brexit is reaching an important juncture. The European Council on 17 October is seen by many as the last chance for Britain to secure a withdrawal deal or another delay. With parliament and government at loggerheads, it is far from clear what happens at the end of October. In a discussion taking place on the day of the European Summit, the speaker will share his insights on the future of negotiations between the UK and the EU under different scenarios. How do the EU and the UK repair relations after 'No Deal'? Should a withdrawal deal be agreed, what does the second phase of negotiations look like and what lessons can Whitehall draw from phase one? And if there is another delay, what will change over the course of the next three months? Please note attendance at this event is by invitation only and places are now full. Event attributes Chatham House Rule Department/project Europe Programme, Britain and Europe: The Post-Referendum Agenda Alina Lyadova Europe Programme Coordinator Email Full Article
ex Britain, the EU and the Power of Myths: What Does Brexit Reveal about Europe? By feedproxy.google.com Published On :: Thu, 31 Oct 2019 15:10:01 +0000 Invitation Only Research Event 14 November 2019 - 8:30am to 9:30am Chatham House | 10 St James's Square | London | SW1Y 4LE Event participants Kalypso Nicolaïdis, Professor of International Relations, Faculty Fellow, St Antony’s College, University of Oxford; Author, Exodus, Reckoning, Sacrifice: Three Meanings of BrexitChair: Hans Kundnani, Senior Research Fellow, Europe Programme, Chatham House When we look back on Brexit, what will it tell us about Europe? Will it simply be that an insular UK was always different and destined to never fit in? Will it be that the UK's decision to leave revealed deeper problems with the EU? Or will it be that the threat created by the UK's withdrawal united the continent and saved the European project?The speaker will explore Brexit through the prism of biblical and ancient Greek mythology. She will examine the reasons behind Britain’s decision to leave the EU and imagine a ‘better Europe’ that has learnt the lessons of the past and reconciled the divisions exposed by the Brexit vote. How can the EU reinvent itself and re-engage its citizens? And where does a post-Brexit UK fit?Attendance at this event is by invitation only. Event attributes Chatham House Rule Department/project Europe Programme, Britain and Europe: The Post-Referendum Agenda Alina Lyadova Europe Programme Coordinator Email Full Article
ex Reflections on the Brexit Election By feedproxy.google.com Published On :: Mon, 18 Nov 2019 12:20:01 +0000 Invitation Only Research Event 6 December 2019 - 8:30am to 9:30am Chatham House | 10 St James's Square | London | SW1Y 4LE Event participants Alistair Burt, Conservative Member of Parliament (1983-97 and 2001-19); Minister of State for the Middle East, UK Foreign & Commonwealth Office and Minister of State at the Department for UK International Development (2017-19) On 12 December 2019, the United Kingdom will hold one of its most crucial elections in the 21st century. The result will have a direct impact on the Brexit process and will most likely determine the country’s future direction for years to come. Yet the final outcome is far from predictable. It seems quite certain that the 2019 election is unlikely to produce a clear two-party share of the vote as happened back in 2017. Public trust in politicians is low and party loyalty is looser than ever. Polls show that Brexit it overwhelmingly considered as the main issue among the electorate alongside a deep concern about the future of public services. This raises multiple questions: can the 2019 election represent a chance to unite the country and move on? Will cross-party identities of ‘Leavers’ and ‘Remainers’ translate to how people vote in the election? And what will the outcome mean for Brexit and the future of party politics in Britain? Attendance at this event is by invitation only. Event attributes Chatham House Rule Department/project Europe Programme, Britain and Europe: The Post-Referendum Agenda Alina Lyadova Europe Programme Coordinator Email Full Article
ex What Boris Johnson’s Big Win Means for Brexit and Scotland By feedproxy.google.com Published On :: Fri, 13 Dec 2019 14:25:22 +0000 13 December 2019 Thomas Raines Director, Europe Programme @TomHRaines Google Scholar Jason Naselli Senior Digital Editor LinkedIn Thomas Raines tells Jason Naselli about the impact the large Conservative majority will have on the next phase of Brexit negotiations and Scotland’s place in the United Kingdom. 2019-12-13-Johnson.jpg Boris Johnson speaks after the Conservatives secured a majority in the UK general election. Photo: Getty Images. What does the UK election result mean for Brexit and forthcoming trade negotiations with the EU?The most important thing is that it means Brexit will definitely happen. Since the referendum, we’ve had three-and-a-half years of continued uncertainty where all outcomes were still possible. We now know that Brexit will become irreversible from 31 January.That’s the biggest thing, because I think that will have a big psychological impact on politics, both in the UK and also on the EU side. The EU has been working with a partner that has been unsure about its direction, and perhaps some had still hoped that the process might still be reversed, but that direction is now completely clear.Obviously the first order of business is to pass the withdrawal agreement, which should be pretty straightforward given the majority that the Conservatives have. That’s a formality now.Then, the question becomes about the level of ambition for the next year. It is an exceptionally ambitious timetable to negotiate, ratify and implement a new relationship before the end of the transition period in December 2020.What is achievable by the end of next year? I think there are three possible outcomes here. One: that timetable doesn’t work and Boris Johnson follows through on his pledge to leave the transition period anyway, leading to a ‘no trade deal’ outcome.Two: the negotiations are able to deliver something by the end of 2020, either because the depth and ambition of any agreement is relatively low level (what Michel Barnier has called a ‘vital minimum’) and/or because they come up with some type of compromise on the process which is not called an extension, but something else: a type of temporary agreement or a new implementation period.This is a situation where you might have a bare-bones agreement for the end of the transition period, but with an extended period of negotiation for different unresolved issues. The EU will probably insist upon level playing field guarantees and fishing access rights as a component of any such agreement.Three: Boris Johnson breaks his manifesto pledge not to extend the transition. Now, he has stared down the barrel of leaving with no deal before and he made a political judgment that it was better to make significant compromises on his negotiating position than to follow through with ‘no deal’. I suspect he might make that same judgment again.No option is ideal. The first is the most economically disruptive, the second means the EU will be in an even stronger position to dictate terms and the third means breaking a manifesto pledge.How important is that end of transition deadline now? It was an important issue for the Brexit Party and hardliners in the European Research Group of Conservative MPs. But given the size of a majority, he may need to worry less about them. Is the transition deadline that important to people who voted Conservative, especially if he can show that he has taken the UK out of the EU by the end of January?I think there may indeed be some political space for Johnson here, given the size of his majority and given that the first phase of Brexit will have been done, along with the debate about withdrawal.There will be a lot of difficult, technical negotiations in all sorts of areas, some of which I think will become quite rancorous, but won’t necessarily become front page news in the way some of the first phase of negotiations has, not least because you won’t have the theatre of a hung parliament.Hopefully, there will be more focus on the substance of the agreement, and the debate will be about the consequences of divergence versus staying more aligned with the EU, which is basically the central question now about the future relationship.I still think for UK prime ministers to pick arbitrary dates, and then to make domestic political promises based around them, actually undermines the UK’s negotiating position. It would be in Britain’s interest to have more flexibility rather than a ticking clock.Moving to the other big story from the night, the SNP won 48 of 59 seats in Scotland. How does the debate over Scotland’s future in the United Kingdom play out from here?The SNP has really strengthened its position, more than many expected. This is now set up for a huge constitutional struggle over the future of the United Kingdom.I think there is a key dilemma for Scottish independence supporters, which is that on the one hand Brexit greatly strengthens the political case for independence. The difference between the political preferences in Scotland and the rest of the UK, particularly in England, is a perfect demonstration of that.At the same time, once the UK has left the EU, independence becomes much more difficult technically and economically. There will be many of the same difficulties that there have been in discussing Northern Ireland’s relationship with the Republic of Ireland. There will be a difficult debate over the currency. There are all sorts of challenges to creating a trade or regulatory border between England and Scotland. This is particularly true if there is a harder Brexit outcome, where Britain leaves the EU without a large amount of regulatory alignment.On demands for a second independence referendum, I think in the first instance Boris Johnson will simply refuse to hold one. It’s probably not in his short-term interest to do anything else. Theresa May played it this way in 2017, repeatedly saying ‘now is not the time’.In a similar way I think Johnson will just try to ride the pressure out, to the point where the SNP will need to face the challenges of advocating independence with the UK outside the EU. The next flashpoint will be the elections to the Scottish Parliament in 2021.Ultimately, though, it will become a democratically unsustainable position if Scotland continues to vote for the SNP, and refusing to sanction a second independence referendum might only reinforce that sentiment.Follow Chatham House Twitter for more election coverage Full Article
ex In Next Round of EU Negotiations, Britain Faces Familiar Pitfalls By feedproxy.google.com Published On :: Fri, 31 Jan 2020 14:33:27 +0000 31 January 2020 Thomas Raines Director, Europe Programme @TomHRaines Google Scholar Professor Richard G Whitman Associate Fellow, Europe Programme @RGWhitman Google Scholar Despite being free of the constraints and the theatre of a hung parliament, there is a risk that over the coming year the British government repeats too many of the mistakes of the withdrawal negotiations. 2020-01-31-Ldn.jpg The Elizabeth Tower remains under renovation on 31 January 2020. Photo: Getty Images. Whether feared or longed for, Brexit day has arrived. It is positive for all sides that the process is thus far managed and ordered, with debts paid, rights guaranteed and borders still invisible on the island of Ireland. But in a difficult new phase of negotiations, as the UK and EU try to hammer out the terms of their relationship after 2020, Britain is at risk of repeating many of its mistakes from the withdrawal talks.First, the government, through the negotiation timeline, has reduced its own room for manoeuvre. The failure of the initial withdrawal agreement and subsequent turbulent politics have reduced a planned 21-month transition to an 11-month one. Even though half the original negotiation time has been lost, 31 December 2020 remains in place and indeed has been written into UK law as the date the transition arrangement ends. Boris Johnson has followed Theresa May in investing symbolism and significance in an arbitrary date.By promising not to extend negotiations, the UK is boxing itself in, creating domestic political barriers where it may well need flexibility. The familiar face of Michel Barnier, who proved adept in leading the withdrawal negotiations for the EU side, will be back in phase two to tell Britain the clock is ticking. This new timeline is intended to focus minds but more likely it will limit ambitions. Second, this government has continued the pattern of its predecessor in making no effort to manage public expectations about the consequences of Brexit. It is naïve to have followed the last years of British politics and expect an outbreak of sobriety and levelheadedness. The entrenched positions of each side have offered little political space or electoral incentive for realism.During the 2020 transition period, the UK will lose the political rights of EU membership but it will retain the benefits and obligations. Most citizens and business will not be able to tell the difference. But a reckoning is inevitable. There will come a moment when the effects of this slow-motion political revolution – particularly in the hard form envisioned by Boris Johnson – become real, when the trade-offs and compromises, especially for business and the economy, will bite. The public deserve some realism about the price of sovereignty.Third, there is a risk that government remains underprepared. While its headline goals are clear – at least in terms of what it does not want – the UK government will need thorough, realistic and coherent proposals on what it wants in every area of negotiations, and crucially develop a process by which to make political trade-offs between the demands of different sectors and issues. The government must also then prepare for their implementation in every area. This would be a huge challenge even if the final destination was already known, which it is not. Fourth, the continued uncertainty in the process means businesses and civil servants will again be left with little time to adapt to what will face them in January 2021 and must prepare for multiple outcomes.‘Transition’ has always been a misleading term, since it implies clarity about the destination to which the UK–EU relationship will be transitioning. The government’s red lines for that future relationship provide a sketch: outside of the single market and the jurisdiction of the European Court of Justice, with an independent trade policy and free movement ended.But businesses and civil servants are not likely to know until very late in the process if the basis for future trade with the EU will be in the form of a free trade agreement, to be negotiated and implemented by the end of the year, or no trade deal at all. This last outcome is a realistic prospect. Michel Barnier speaks in the European Parliament on 29 January. Photo: Getty Images. During withdrawal negotiations, the extensions were both unlimited in number and required decisions only at the last moment. In this phase, the talks may only be extended once, and that decision must be taken six months from the final deadline. It is difficult to see circumstances in which Boris Johnson agrees to break a political promise and manifesto pledge when he still has six more months to achieve his desired outcome.The UK, it is often noted, is already fully compliant with EU law and this shared starting point is often cited as a reason this negotiation will be simple, since the parties begin in alignment. But this novel negotiation will create new trade barriers in goods and services rather than remove them. Trade deals are often politically difficult since they create winners and losers. The Brexit negotiations, in terms of UK–EU trade at least, will generally create only different levels of losers, on both sides of the Channel.That means difficult politics, challenging negotiations and hard compromises, another reason to expect some ugly politics along the way and accept that failure is a plausible outcome.We do not yet know how Brexit will change Britain in the long term, whether a settled majority will ever come to view it as political folly or liberation, choice or inevitability. If its politically fragile union can withstand the pressures of the next few years, the UK may yet find a new stable position on the EU’s periphery and, after a period of economic adjustment, begin to address the many pressing domestic challenges which have suffered from neglect amid the all-consuming Brexit saga.But whatever happens in this next chapter, the EU can no longer be an excuse for national problems. As the UK takes back control it also returns accountability. In the future, there will be no one else to credit or to blame. Full Article
ex Virtual Breakfast: Is a Brexit Delay Possible? By feedproxy.google.com Published On :: Tue, 24 Mar 2020 15:15:01 +0000 Research Event 7 April 2020 - 8:30am to 9:30am Event participants Gavin Barwell, Downing Street Chief of Staff to Prime Minister Theresa May (2017-19)Chair: Thomas Raines, Director, Europe Programme, Chatham House Please note this an online-only event.According to a previously agreed timetable for phase two of Brexit talks, negotiations on the future EU-UK trade relations were scheduled to begin in March. Then a global pandemic hit. Despite the ongoing COVID-19 outbreak, the UK government insists that the Brexit negotiations are on track and there are currently no plans to extend the transition period beyond 2020.However, the original timetable for trade talks was already widely seen as extremely constrained. Can negotiations still be done in time? With the decision on any possible extension to be made by July at the latest, can the two sides make sufficient progress by that point? Or would the ongoing public health crisis make requesting an extension to the transition period more politically viable for the UK government? Finally, if there is no extension, could Britain still leave the EU with no deal?In this webinar, the speaker will discuss how the need to manage other challenges, such as the current COVID-19 outbreak, might affect the government’s approach to the negotiations with the EU. He will also share his insights on what to expect from the second phase of negotiations and on the most important lessons from phase one. Department/project Europe Programme, Britain and Europe: The Post-Referendum Agenda Alina Lyadova Europe Programme Coordinator Email Full Article
ex Evolution, expression, and substrate specificities of aldehyde oxidase enzymes in eukaryotes [Enzymology] By feedproxy.google.com Published On :: 2020-04-17T00:06:05-07:00 Aldehyde oxidases (AOXs) are a small group of enzymes belonging to the larger family of molybdo-flavoenzymes, along with the well-characterized xanthine oxidoreductase. The two major types of reactions that are catalyzed by AOXs are the hydroxylation of heterocycles and the oxidation of aldehydes to their corresponding carboxylic acids. Different animal species have different complements of AOX genes. The two extremes are represented in humans and rodents; whereas the human genome contains a single active gene (AOX1), those of rodents, such as mice, are endowed with four genes (Aox1-4), clustering on the same chromosome, each encoding a functionally distinct AOX enzyme. It still remains enigmatic why some species have numerous AOX enzymes, whereas others harbor only one functional enzyme. At present, little is known about the physiological relevance of AOX enzymes in humans and their additional forms in other mammals. These enzymes are expressed in the liver and play an important role in the metabolisms of drugs and other xenobiotics. In this review, we discuss the expression, tissue-specific roles, and substrate specificities of the different mammalian AOX enzymes and highlight insights into their physiological roles. Full Article
ex Reduction of protein phosphatase 2A (PP2A) complexity reveals cellular functions and dephosphorylation motifs of the PP2A/B'{delta} holoenzyme [Enzymology] By feedproxy.google.com Published On :: 2020-04-24T06:08:45-07:00 Protein phosphatase 2A (PP2A) is a large enzyme family responsible for most cellular Ser/Thr dephosphorylation events. PP2A substrate specificity, localization, and regulation by second messengers rely on more than a dozen regulatory subunits (including B/R2, B'/R5, and B″/R3), which form the PP2A heterotrimeric holoenzyme by associating with a dimer comprising scaffolding (A) and catalytic (C) subunits. Because of partial redundancy and high endogenous expression of PP2A holoenzymes, traditional approaches of overexpressing, knocking down, or knocking out PP2A regulatory subunits have yielded only limited insights into their biological roles and substrates. To this end, here we sought to reduce the complexity of cellular PP2A holoenzymes. We used tetracycline-inducible expression of pairs of scaffolding and regulatory subunits with complementary charge-reversal substitutions in their interaction interfaces. For each of the three regulatory subunit families, we engineered A/B charge–swap variants that could bind to one another, but not to endogenous A and B subunits. Because endogenous Aα was targeted by a co-induced shRNA, endogenous B subunits were rapidly degraded, resulting in expression of predominantly a single PP2A heterotrimer composed of the A/B charge–swap pair and the endogenous catalytic subunit. Using B'δ/PPP2R5D, we show that PP2A complexity reduction, but not PP2A overexpression, reveals a role of this holoenzyme in suppression of extracellular signal–regulated kinase signaling and protein kinase A substrate dephosphorylation. When combined with global phosphoproteomics, the PP2A/B'δ reduction approach identified consensus dephosphorylation motifs in its substrates and suggested that residues surrounding the phosphorylation site play roles in PP2A substrate specificity. Full Article
ex Processivity of dextransucrases synthesizing very-high-molar-mass dextran is mediated by sugar-binding pockets in domain V [Glycobiology and Extracellular Matrices] By feedproxy.google.com Published On :: 2020-04-24T06:08:45-07:00 The dextransucrase DSR-OK from the Gram-positive bacterium Oenococcus kitaharae DSM17330 produces a dextran of the highest molar mass reported to date (∼109 g/mol). In this study, we selected a recombinant form, DSR-OKΔ1, to identify molecular determinants involved in the sugar polymerization mechanism and that confer its ability to produce a very-high-molar-mass polymer. In domain V of DSR-OK, we identified seven putative sugar-binding pockets characteristic of glycoside hydrolase 70 (GH70) glucansucrases that are known to be involved in glucan binding. We investigated their role in polymer synthesis through several approaches, including monitoring of dextran synthesis, affinity assays, sugar binding pocket deletions, site-directed mutagenesis, and construction of chimeric enzymes. Substitution of only two stacking aromatic residues in two consecutive sugar-binding pockets (variant DSR-OKΔ1-Y1162A-F1228A) induced quasi-complete loss of very-high-molar-mass dextran synthesis, resulting in production of only 10–13 kg/mol polymers. Moreover, the double mutation completely switched the semiprocessive mode of DSR-OKΔ1 toward a distributive one, highlighting the strong influence of these pockets on enzyme processivity. Finally, the position of each pocket relative to the active site also appeared to be important for polymer elongation. We propose that sugar-binding pockets spatially closer to the catalytic domain play a major role in the control of processivity. A deep structural characterization, if possible with large-molar-mass sugar ligands, would allow confirming this hypothesis. Full Article
ex The Escherichia coli cellulose synthase subunit G (BcsG) is a Zn2+-dependent phosphoethanolamine transferase [Glycobiology and Extracellular Matrices] By feedproxy.google.com Published On :: 2020-05-01T00:06:09-07:00 Bacterial biofilms are cellular communities that produce an adherent matrix. Exopolysaccharides are key structural components of this matrix and are required for the assembly and architecture of biofilms produced by a wide variety of microorganisms. The human bacterial pathogens Escherichia coli and Salmonella enterica produce a biofilm matrix composed primarily of the exopolysaccharide phosphoethanolamine (pEtN) cellulose. Once thought to be composed of only underivatized cellulose, the pEtN modification present in these matrices has been implicated in the overall architecture and integrity of the biofilm. However, an understanding of the mechanism underlying pEtN derivatization of the cellulose exopolysaccharide remains elusive. The bacterial cellulose synthase subunit G (BcsG) is a predicted inner membrane–localized metalloenzyme that has been proposed to catalyze the transfer of the pEtN group from membrane phospholipids to cellulose. Here we present evidence that the C-terminal domain of BcsG from E. coli (EcBcsGΔN) functions as a phosphoethanolamine transferase in vitro with substrate preference for cellulosic materials. Structural characterization of EcBcsGΔN revealed that it belongs to the alkaline phosphatase superfamily, contains a Zn2+ ion at its active center, and is structurally similar to characterized enzymes that confer colistin resistance in Gram-negative bacteria. Informed by our structural studies, we present a functional complementation experiment in E. coli AR3110, indicating that the activity of the BcsG C-terminal domain is essential for integrity of the pellicular biofilm. Furthermore, our results established a similar but distinct active-site architecture and catalytic mechanism shared between BcsG and the colistin resistance enzymes. Full Article
ex A Legionella effector kinase is activated by host inositol hexakisphosphate [Enzymology] By feedproxy.google.com Published On :: 2020-05-01T00:06:09-07:00 The transfer of a phosphate from ATP to a protein substrate, a modification known as protein phosphorylation, is catalyzed by protein kinases. Protein kinases play a crucial role in virtually every cellular activity. Recent studies of atypical protein kinases have highlighted the structural similarity of the kinase superfamily despite notable differences in primary amino acid sequence. Here, using a bioinformatics screen, we searched for putative protein kinases in the intracellular bacterial pathogen Legionella pneumophila and identified the type 4 secretion system effector Lpg2603 as a remote member of the protein kinase superfamily. Employing an array of biochemical and structural biology approaches, including in vitro kinase assays and isothermal titration calorimetry, we show that Lpg2603 is an active protein kinase with several atypical structural features. Importantly, we found that the eukaryote-specific host signaling molecule inositol hexakisphosphate (IP6) is required for Lpg2603 kinase activity. Crystal structures of Lpg2603 in the apo-form and when bound to IP6 revealed an active-site rearrangement that allows for ATP binding and catalysis. Our results on the structure and activity of Lpg2603 reveal a unique mode of regulation of a protein kinase, provide the first example of a bacterial kinase that requires IP6 for its activation, and may aid future work on the function of this effector during Legionella pathogenesis. Full Article
ex Crystallographic and kinetic analyses of the FdsBG subcomplex of the cytosolic formate dehydrogenase FdsABG from Cupriavidus necator [Molecular Biophysics] By feedproxy.google.com Published On :: 2020-05-08T03:41:14-07:00 Formate oxidation to carbon dioxide is a key reaction in one-carbon compound metabolism, and its reverse reaction represents the first step in carbon assimilation in the acetogenic and methanogenic branches of many anaerobic organisms. The molybdenum-containing dehydrogenase FdsABG is a soluble NAD+-dependent formate dehydrogenase and a member of the NADH dehydrogenase superfamily. Here, we present the first structure of the FdsBG subcomplex of the cytosolic FdsABG formate dehydrogenase from the hydrogen-oxidizing bacterium Cupriavidus necator H16 both with and without bound NADH. The structures revealed that the two iron-sulfur clusters, Fe4S4 in FdsB and Fe2S2 in FdsG, are closer to the FMN than they are in other NADH dehydrogenases. Rapid kinetic studies and EPR measurements of rapid freeze-quenched samples of the NADH reduction of FdsBG identified a neutral flavin semiquinone, FMNH•, not previously observed to participate in NADH-mediated reduction of the FdsABG holoenzyme. We found that this semiquinone forms through the transfer of one electron from the fully reduced FMNH−, initially formed via NADH-mediated reduction, to the Fe2S2 cluster. This Fe2S2 cluster is not part of the on-path chain of iron-sulfur clusters connecting the FMN of FdsB with the active-site molybdenum center of FdsA. According to the NADH-bound structure, the nicotinamide ring stacks onto the re-face of the FMN. However, NADH binding significantly reduced the electron density for the isoalloxazine ring of FMN and induced a conformational change in residues of the FMN-binding pocket that display peptide-bond flipping upon NAD+ binding in proper NADH dehydrogenases. Full Article
ex Civil society perspectives on sexual violence in conflict: patriarchy and war strategy in Colombia By feedproxy.google.com Published On :: Wed, 04 Mar 2020 13:31:21 +0000 4 March 2020 , Volume 96, Number 2 Anne-Kathrin Kreft Read Online In international policy circles, conflict-related sexual violence (CRSV) is commonly viewed as a weapon of war, a framing that researchers have criticized as overly simplistic. Feminist scholars in particular caution that the ‘weapon of war’ framing decontextualizes sexual violence in conflict from the structural factors of gender inequality that underpin its perpetration. In light of these tensions, how do politically relevant local actors perceive the nature and the origins of conflict-related sexual violence? Civil society organizations often actively confront conflict-related sexual violence on the ground. A better understanding of how their perceptions of this violence align or clash with the globally dominant ‘weapon of war’ narratives therefore has important policy implications. Interviews with representatives of Colombian women's organizations and victims' associations reveal that these civil society activists predominantly view conflict-related sexual violence as the result of patriarchal structures. The mobilized women perceive sexual violence as a very gendered violence that exists on a continuum extending through peace, the everyday and war, and which the presence of arms exacerbates. Strategic sexual violence, too, is understood to ultimately have its basis in patriarchal structures. The findings expose a disconnect between the globally dominant ‘weapon of war’ understanding that is decontextualized from structural factors and a local approach to CRSV that establishes clear linkages to societal gender inequality. Full Article
ex Predictions and Policymaking: Complex Modelling Beyond COVID-19 By feedproxy.google.com Published On :: Wed, 01 Apr 2020 09:11:23 +0000 1 April 2020 Yasmin Afina Research Assistant, International Security Programme @afinayasmin LinkedIn Calum Inverarity Research Analyst and Coordinator, International Security Programme LinkedIn The COVID-19 pandemic has highlighted the potential of complex systems modelling for policymaking but it is crucial to also understand its limitations. GettyImages-1208425931.jpg A member of the media wearing a protective face mask works in Downing Street where Britain's Prime Minister Boris Johnson is self-isolating in central London, 27 March 2020. Photo by TOLGA AKMEN/AFP via Getty Images. Complex systems models have played a significant role in informing and shaping the public health measures adopted by governments in the context of the COVID-19 pandemic. For instance, modelling carried out by a team at Imperial College London is widely reported to have driven the approach in the UK from a strategy of mitigation to one of suppression.Complex systems modelling will increasingly feed into policymaking by predicting a range of potential correlations, results and outcomes based on a set of parameters, assumptions, data and pre-defined interactions. It is already instrumental in developing risk mitigation and resilience measures to address and prepare for existential crises such as pandemics, prospects of a nuclear war, as well as climate change.The human factorIn the end, model-driven approaches must stand up to the test of real-life data. Modelling for policymaking must take into account a number of caveats and limitations. Models are developed to help answer specific questions, and their predictions will depend on the hypotheses and definitions set by the modellers, which are subject to their individual and collective biases and assumptions. For instance, the models developed by Imperial College came with the caveated assumption that a policy of social distancing for people over 70 will have a 75 per cent compliance rate. This assumption is based on the modellers’ own perceptions of demographics and society, and may not reflect all societal factors that could impact this compliance rate in real life, such as gender, age, ethnicity, genetic diversity, economic stability, as well as access to food, supplies and healthcare. This is why modelling benefits from a cognitively diverse team who bring a wide range of knowledge and understanding to the early creation of a model.The potential of artificial intelligenceMachine learning, or artificial intelligence (AI), has the potential to advance the capacity and accuracy of modelling techniques by identifying new patterns and interactions, and overcoming some of the limitations resulting from human assumptions and bias. Yet, increasing reliance on these techniques raises the issue of explainability. Policymakers need to be fully aware and understand the model, assumptions and input data behind any predictions and must be able to communicate this aspect of modelling in order to uphold democratic accountability and transparency in public decision-making.In addition, models using machine learning techniques require extensive amounts of data, which must also be of high quality and as free from bias as possible to ensure accuracy and address the issues at stake. Although technology may be used in the process (i.e. automated extraction and processing of information with big data), data is ultimately created, collected, aggregated and analysed by and for human users. Datasets will reflect the individual and collective biases and assumptions of those creating, collecting, processing and analysing this data. Algorithmic bias is inevitable, and it is essential that policy- and decision-makers are fully aware of how reliable the systems are, as well as their potential social implications.The age of distrustIncreasing use of emerging technologies for data- and evidence-based policymaking is taking place, paradoxically, in an era of growing mistrust towards expertise and experts, as infamously surmised by Michael Gove. Policymakers and subject-matter experts have faced increased public scrutiny of their findings and the resultant policies that they have been used to justify.This distrust and scepticism within public discourse has only been fuelled by an ever-increasing availability of diffuse sources of information, not all of which are verifiable and robust. This has caused tension between experts, policymakers and public, which has led to conflicts and uncertainty over what data and predictions can be trusted, and to what degree. This dynamic is exacerbated when considering that certain individuals may purposefully misappropriate, or simply misinterpret, data to support their argument or policies. Politicians are presently considered the least trusted professionals by the UK public, highlighting the importance of better and more effective communication between the scientific community, policymakers and the populations affected by policy decisions.Acknowledging limitationsWhile measures can and should be built in to improve the transparency and robustness of scientific models in order to counteract these common criticisms, it is important to acknowledge that there are limitations to the steps that can be taken. This is particularly the case when dealing with predictions of future events, which inherently involve degrees of uncertainty that cannot be fully accounted for by human or machine. As a result, if not carefully considered and communicated, the increased use of complex modelling in policymaking holds the potential to undermine and obfuscate the policymaking process, which may contribute towards significant mistakes being made, increased uncertainty, lack of trust in the models and in the political process and further disaffection of citizens.The potential contribution of complexity modelling to the work of policymakers is undeniable. However, it is imperative to appreciate the inner workings and limitations of these models, such as the biases that underpin their functioning and the uncertainties that they will not be fully capable of accounting for, in spite of their immense power. They must be tested against the data, again and again, as new information becomes available or there is a risk of scientific models becoming embroiled in partisan politicization and potentially weaponized for political purposes. It is therefore important not to consider these models as oracles, but instead as one of many contributions to the process of policymaking. Full Article
ex Virtual Roundtable: Evaluating Outcomes in Fragile Contexts: Adapting Research Methods in the Time of COVID-19 By feedproxy.google.com Published On :: Mon, 04 May 2020 08:55:01 +0000 Invitation Only Research Event 5 May 2020 - 12:00pm to 1:00pm Agendapdf | 107.59 KB Event participants Rebecca Wolfe, Lecturer, Harris School for Public Policy and Associate, Pearson Institute for the Study and Resolution of Global Conflicts, University of ChicagoTom Gillhespy, Principal Consultant, ItadShodmon Hojibekov, Chief Executive Officer, Aga Khan Agency for Habitat (Afghanistan)Chair: Champa Patel, Director, Asia-Pacific Programme, Chatham House This virtual roundtable has been co-convened by Chatham House and the Aga Khan Foundation. While conducting research in fragile and conflict-affected contexts has always presented challenges, the outbreak of COVID-19 creates additional challenges including travel restrictions, ethical challenges, and disruptions to usual modes of working. This virtual roundtable will explore how organizations can adapt their research and monitoring and evaluation models in response to the coronavirus pandemic. This event aims to discuss the research methods being used to mitigate the impact of the COVID-19 crisis; the important role of technology; and ways to engage policy and decision-makers during this time. Event attributes Chatham House Rule Department/project Asia-Pacific Programme, Conflict, Peace and Stability, Geopolitics and Governance Lucy Ridout Programme Administrator, Asia-Pacific Programme +44 (0) 207 314 2761 Email Full Article
ex Britain is experiencing a little turbulence By feedproxy.google.com Published On :: Thu, 31 Jul 2014 16:04:58 +0000 31 July 2014 , Volume 70, Number 4 A long view of the problems of modern migration Robert Winder is author of ‘Bloody Foreigners' and former literary editor of The Independent and deputy editor of Granta Winder.jpg Some of the first Afro-Caribbean immigrants arrive in East London from Jamaica. Photo: Popperfoto/Getty Full Article
ex Abkhazia: Developments in the Domestic and Regional Context By feedproxy.google.com Published On :: Thu, 09 Oct 2014 12:45:01 +0000 Invitation Only Research Event 14 October 2014 - 10:00am to 11:30am Chatham House, London Meeting Summarypdf | 40.6 KB Event participants Viacheslav Chirikba, de facto Minister of Foreign Affairs, Abkhazia Viacheslav Chirikba will offer his perspective on the situation in Abkhazia following the recent presidential elections, and the developments in Abkhazia's relations with other regional players. Attendance at this event is by invitation only. Lubica Pollakova +44 (0)20 7314 2775 Email Full Article
ex Challenges to Freedom of Expression By feedproxy.google.com Published On :: Tue, 21 Jun 2016 10:00:01 +0000 Research Event 20 July 2016 - 6:00pm to 7:15pm Chatham House, London Meeting Summarypdf | 107.63 KB Event participants Sherif Elsayed-Ali, Head of Technology and Human Rights, Amnesty InternationalProfessor David Kaye, UN Special Rapporteur on the Promotion and Protection of the Right to Freedom of Opinion and ExpressionChair: Sonya Sceats, Associate Fellow, International Law Programme, Chatham House The digital age has seen an extraordinary transformation in how individuals can exercise their right to freedom of expression. What are the proper limits of state interference in online communication in pursuit of national security and public order? What does this mean for privacy? And away from the digital world, to what extent is free speech being affected by counterterrorism measures and actions to prevent hate crimes? How do all of these challenges affect the space for civil society action? Department/project International Law Programme, Rights, Accountability and Justice, International Law Discussion Group Chanu Peiris Programme Manager, International Law +44 (0)20 7314 3686 Email Full Article
ex Syria: Destruction of Civil Society Means Dictatorship, Extremism and Displacement By feedproxy.google.com Published On :: Fri, 07 Oct 2016 08:56:47 +0000 7 October 2016 Rana Marcel Khalaf Former Academy Associate The void in governance in Syria caused by the conflict has enabled a previously oppressed civil society to rise. Now this new society is under threat. Sustained commitment from the international community is required. 2016-10-07-white-helmets-syria2.jpg Syrian civil defence volunteers, known as the White Helmets, search amid the rubble of destroyed buildings following an air strike on the rebel-held neighbourhood of Aleppo, on October 4, 2016. Photo: Getty Images. The void in governance created by the ongoing Syrian conflict has been capitalized upon by warlords, militias and extremist groups to expand and consolidate their power – but has also helped to generate activism, with new leaders born as a reaction to authoritarian governance and conflict limitations.As public social services have been taken over as war tools, local coordination committees, local councils, humanitarian support groups, citizen journalist networks, women’s groups, and more, have mushroomed across all of Syria. But this new civil society continues to be threatened by many challenges.It remains hindered by structural weakness and limited capacity - largely as a result of the legacy of Ba’athist policies, which did not allow civil society to exist in the so-called Damascus Spring, but only under the umbrella of the Government, First Lady Asma al-Assad and business NGOs (GoNGOs, FLNGOs and BoNGOs). Beyond this, civil society was limited to purely charitable and religious causes, known as “moujtamaa ahli”.In addition, Syrian civil society is often a victim of counter-terrorism legislation, with laws and regulations across many countries and institutions prohibiting Syrians from registering an organization and opening bank accounts. This makes it difficult to secure financial support in an environment where funding has already been dwindling due to a “Syria fatigue” among potential donors, and where any money available is mainly directed at large, often international, NGOs.Trust, hope and legitimacyTo reach funds, many organizations have to submit to this “NGOization” process. But even this rarely allows for civil society to foster its own interests through core funding. Civil society in Syria is treated more as a “project” with strict indicators, deals and deadlines, when working under conflict necessitates building relationships of trust with a community over time and often has to cover the direct needs on the ground to gain local legitimacy and increase effectiveness. Trust, hope and legitimacy are not aspects you can report against or cover in a sophisticated proposal.But despite such obstacles, activists and civil society groups continue to volunteer for various causes, ensuring many have not had to seek refuge elsewhere. And their work has included challenging authoritarian and extremist governance.In Aleppo in 2014, it was civil society with the support of a military faction of Jaish Al Mujahideen that helped expel ISIS. Local councils have since been providing services ranging from humanitarian aid and garbage collection to re-establishing order and resolving local conflicts, thus challenging the legitimacy of jihadist institutions.NGOs such as the Civil Defense Forces (known as the White Helmets) continually risk their lives to save others by rescuing people from bombed out buildings. On September 19, when a UN sanctioned aid convoy was attacked in Aleppo – reportedly by Russian aircraft – it was the White Helmets that responded, before then coming under attack themselves.Human rights activists, meanwhile, persist in documenting human rights abuses in the hope that the perpetrators will eventually be held accountable.However, a Syrian civil society tragedy is unfolding as their work is struggling to survive. To give but one example, Kesh Malek, one of the biggest groups running home-based schooling for children in Aleppo, has already had to close some of its schools.Lacking international protection, the fate of these children in relation to arms and radicalization is all the more alarming. Several local councils have also been much weakened, especially vis-à-vis warlords, authoritarian and/or extremists actors.At its best, the current bombing campaign serves to kill any potential alternatives to an authoritarian regime, and only boosts human suffering, radicalization and displacement.If this situation is to be reversed, international actors need to ensure security at the local Syrian level, showing that Syrian security is as important as that of Europe.This means financial security through a deeper and more sustainable capacity building and funding to civil society, and it means protecting civilians and civil society groups though the creation of a safe haven.To comment on this article, please contact Chatham House Feedback Full Article
ex Gene expression regulation by retinoic acid By feedproxy.google.com Published On :: 2002-11-01 James E. BalmerNov 1, 2002; 43:1773-1808Reviews Full Article
ex Lipid extraction by methyl-tert-butyl ether for high-throughput lipidomics By feedproxy.google.com Published On :: 2008-05-01 Vitali MatyashMay 1, 2008; 49:1137-1146Methods Full Article
ex Adipose differentiation-related protein is an ubiquitously expressed lipid storage droplet-associated protein By feedproxy.google.com Published On :: 1997-11-01 DL BrasaemleNov 1, 1997; 38:2249-2263Articles Full Article
ex Quantitation of atherosclerosis in murine models: correlation between lesions in the aortic origin and in the entire aorta, and differences in the extent of lesions between sexes in LDL receptor-deficient and apolipoprotein E-deficient mice By feedproxy.google.com Published On :: 1995-11-01 RK TangiralaNov 1, 1995; 36:2320-2328Articles Full Article
ex Role of the peroxisome proliferator-activated receptor (PPAR) in mediating the effects of fibrates and fatty acids on gene expression By feedproxy.google.com Published On :: 1996-05-01 K SchoonjansMay 1, 1996; 37:907-925Reviews Full Article
ex Use of cyclodextrins for manipulating cellular cholesterol content By feedproxy.google.com Published On :: 1997-11-01 AE ChristianNov 1, 1997; 38:2264-2272Articles Full Article
ex The amphipathic helix in the exchangeable apolipoproteins: a review of secondary structure and function By feedproxy.google.com Published On :: 1992-02-01 JP SegrestFeb 1, 1992; 33:141-166Reviews Full Article
ex Implications of AMLO and Bolsonaro for Mexican and Brazilian Foreign Policy By feedproxy.google.com Published On :: Fri, 14 Feb 2020 10:30:01 +0000 Invitation Only Research Event 26 February 2020 - 12:15pm to 1:15pm Chatham House | 10 St James's Square | London | SW1Y 4LE Event participants Ambassador Andrés Rozental, Senior Adviser, Chatham House; Founding President, Mexican Council on Foreign RelationsDr Elena Lazarou, Associate Fellow, US and the Americas Programme, Chatham HouseChair: Dr Christopher Sabatini, Senior Research Fellow for Latin America, US and the Americas Programme, Chatham House The end of 2018 was a monumental year for Latin America’s two biggest economies. In December 2018, Andrés Manuel López Obrador (AMLO) was inaugurated as Mexico’s 58th president. The following month saw another political shift further south, as Jair Bolsonaro became Brazil’s 38th president. While sitting on opposite ends of the political spectrum, both AMLO and Bolsonaro were considered to be political outsiders and have upended the status quo through their election to office. To what extent does the election of AMLO in Mexico and Bolsonaro in Brazil represent a shift in those countries’ definitions of national interest and foreign policy priorities? How will this affect these states’ policies regarding international commitments and cooperation on issues such as human rights, environment and climate change, migration, and trade? To what extent do possible shifts reflect changing domestic opinions? Will any changes represent a long-term shift in state priorities and policies past these administrations? Department/project US and the Americas Programme, Latin America Initiative US and Americas Programme Email Full Article
ex Exploring the Obstacles and Opportunities for Expanded UK-Latin American Trade and Investment By feedproxy.google.com Published On :: Thu, 27 Feb 2020 12:40:01 +0000 Invitation Only Research Event 14 January 2020 - 8:30am to 11:00am Chatham House | 10 St James's Square | London | SW1Y 4LE Trade and investment between the UK and Latin America is woefully underdeveloped. Latin America’s agricultural powerhouses Brazil and Argentina only accounted for a total of 1.6% of the UK’s agricultural market across eight sectors in 2018, all of those areas in which Argentina and Brazil have substantial comparative advantages. Conversely, UK exports to the large Latin American economies remain far below their potential. To cite a few examples, in 2018 in the electrical equipment sector, the UK only exported $95.7 million of those products to Brazil, making the ninth largest economy in the world only the 42nd export market for those goods from the UK; Mexico only imported $91.4 million of UK-made electrical goods, placing it directly behind Brazil as UK’s market for those goods.As we look to the future, any improvement to the relationship will depend on two factors: 1) how the UK leaves the EU and 2) whether Latin American agricultural producers can improve their environmental practices and can meet the production standards established by the EU and likely maintained by a potential post-Brexit Britain.In the first meeting of the working group, Chatham House convened a range of policymakers, practitioners and academics to explore this topic in depth, identify the key issues driving this trend, and begin to consider how improvements might best be made. Subsequent meetings will focus on specific sectors in commerce and investment.We would like to thank BTG Pactual, Cairn Energy plc, Diageo, Equinor, Fresnillo Management Services, HSBC Holdings plc and Wintershall Dea for their generous support of the Latin America Initiative. Event attributes Chatham House Rule Department/project US and the Americas Programme, Latin America Initiative US and Americas Programme Email Full Article
ex Civil society perspectives on sexual violence in conflict: patriarchy and war strategy in Colombia By feedproxy.google.com Published On :: Wed, 04 Mar 2020 13:31:21 +0000 4 March 2020 , Volume 96, Number 2 Anne-Kathrin Kreft Read Online In international policy circles, conflict-related sexual violence (CRSV) is commonly viewed as a weapon of war, a framing that researchers have criticized as overly simplistic. Feminist scholars in particular caution that the ‘weapon of war’ framing decontextualizes sexual violence in conflict from the structural factors of gender inequality that underpin its perpetration. In light of these tensions, how do politically relevant local actors perceive the nature and the origins of conflict-related sexual violence? Civil society organizations often actively confront conflict-related sexual violence on the ground. A better understanding of how their perceptions of this violence align or clash with the globally dominant ‘weapon of war’ narratives therefore has important policy implications. Interviews with representatives of Colombian women's organizations and victims' associations reveal that these civil society activists predominantly view conflict-related sexual violence as the result of patriarchal structures. The mobilized women perceive sexual violence as a very gendered violence that exists on a continuum extending through peace, the everyday and war, and which the presence of arms exacerbates. Strategic sexual violence, too, is understood to ultimately have its basis in patriarchal structures. The findings expose a disconnect between the globally dominant ‘weapon of war’ understanding that is decontextualized from structural factors and a local approach to CRSV that establishes clear linkages to societal gender inequality. Full Article
ex Coronavirus in Latin America and Mexico: Infection Rates, Immigration and Policy Responses By feedproxy.google.com Published On :: Mon, 23 Mar 2020 17:20:01 +0000 Invitation Only Research Event 25 March 2020 - 4:00pm to 5:00pm Event participants Jude Webber, Mexico and Central America Correspondent, Financial TimesMichael Stott, Latin America Editor, Financial TimesChair: Dr Christopher Sabatini, Senior Research Fellow for Latin America, US and the Americas Programme, Chatham House This event is part of the Inaugural Virtual Roundtable Series on the US, Americas and the State of the World and will take place virtually only. Participants should not come to Chatham House for these events Department/project US and the Americas Programme, Latin America Initiative US and Americas Programme Email Full Article
ex S-Palmitoylation of the sodium channel Nav1.6 regulates its activity and neuronal excitability [Cell Biology] By feedproxy.google.com Published On :: 2020-05-01T00:06:09-07:00 S-Palmitoylation is a reversible post-translational lipid modification that dynamically regulates protein functions. Voltage-gated sodium channels are subjected to S-palmitoylation and exhibit altered functions in different S-palmitoylation states. Our aim was to investigate whether and how S-palmitoylation regulates Nav1.6 channel function and to identify S-palmitoylation sites that can potentially be pharmacologically targeted. Acyl-biotin exchange assay showed that Nav1.6 is modified by S-palmitoylation in the mouse brain and in a Nav1.6 stable HEK 293 cell line. Using whole-cell voltage clamp, we discovered that enhancing S-palmitoylation with palmitic acid increases Nav1.6 current, whereas blocking S-palmitoylation with 2-bromopalmitate reduces Nav1.6 current and shifts the steady-state inactivation in the hyperpolarizing direction. Three S-palmitoylation sites (Cys1169, Cys1170, and Cys1978) were identified. These sites differentially modulate distinct Nav1.6 properties. Interestingly, Cys1978 is exclusive to Nav1.6 among all Nav isoforms and is evolutionally conserved in Nav1.6 among most species. Cys1978 S-palmitoylation regulates current amplitude uniquely in Nav1.6. Furthermore, we showed that eliminating S-palmitoylation at specific sites alters Nav1.6-mediated excitability in dorsal root ganglion neurons. Therefore, our study reveals S-palmitoylation as a potential isoform-specific mechanism to modulate Nav activity and neuronal excitability in physiological and diseased conditions. Full Article
ex Virtual Roundtable: Evaluating Outcomes in Fragile Contexts: Adapting Research Methods in the Time of COVID-19 By feedproxy.google.com Published On :: Mon, 04 May 2020 08:55:01 +0000 Invitation Only Research Event 5 May 2020 - 12:00pm to 1:00pm Agendapdf | 107.59 KB Event participants Rebecca Wolfe, Lecturer, Harris School for Public Policy and Associate, Pearson Institute for the Study and Resolution of Global Conflicts, University of ChicagoTom Gillhespy, Principal Consultant, ItadShodmon Hojibekov, Chief Executive Officer, Aga Khan Agency for Habitat (Afghanistan)Chair: Champa Patel, Director, Asia-Pacific Programme, Chatham House This virtual roundtable has been co-convened by Chatham House and the Aga Khan Foundation. While conducting research in fragile and conflict-affected contexts has always presented challenges, the outbreak of COVID-19 creates additional challenges including travel restrictions, ethical challenges, and disruptions to usual modes of working. This virtual roundtable will explore how organizations can adapt their research and monitoring and evaluation models in response to the coronavirus pandemic. This event aims to discuss the research methods being used to mitigate the impact of the COVID-19 crisis; the important role of technology; and ways to engage policy and decision-makers during this time. Event attributes Chatham House Rule Department/project Asia-Pacific Programme, Conflict, Peace and Stability, Geopolitics and Governance Lucy Ridout Programme Administrator, Asia-Pacific Programme +44 (0) 207 314 2761 Email Full Article
ex Crimean Reality Check: Four Years of Annexation By feedproxy.google.com Published On :: Wed, 14 Mar 2018 00:00:00 +0000 Full Article
ex Building Resistance to Violent Extremism By feedproxy.google.com Published On :: Mon, 23 Apr 2018 00:00:00 +0100 Full Article
ex Undercurrents: Episode 13 - India's Billionaires, and Sexual Exploitation in the UN By feedproxy.google.com Published On :: Thu, 26 Jul 2018 00:00:00 +0100 Full Article
ex Undercurrents: Episode 15 - Brexit Update, and Corruption in the World of the Global Super-Rich By feedproxy.google.com Published On :: Thu, 23 Aug 2018 00:00:00 +0100 Full Article
ex A Weapon of War? Sexual Violence in the Syrian Conflict By feedproxy.google.com Published On :: Thu, 06 Sep 2018 00:00:00 +0100 Full Article
ex The European Union Before, During and After Brexit By feedproxy.google.com Published On :: Thu, 13 Sep 2018 00:00:00 +0100 Full Article
ex Can and Should Brexit Be Stopped? By feedproxy.google.com Published On :: Mon, 17 Sep 2018 00:00:00 +0100 Full Article
ex Undercurrents: Episode 17 - Alastair Campbell on New Labour and Brexit, Alistair Darling on the Financial Crisis By feedproxy.google.com Published On :: Thu, 20 Sep 2018 00:00:00 +0100 Full Article
ex The Kremlin Letters: Wartime Exchanges of the Big Three By feedproxy.google.com Published On :: Wed, 07 Nov 2018 00:00:00 +0000 Full Article
ex Radical Change? New Political Paradigms in Brazil and Mexico By feedproxy.google.com Published On :: Tue, 12 Feb 2019 00:00:00 +0000 Full Article
ex Podcast: Examining The Post-Brexit Japan-UK Partnership By feedproxy.google.com Published On :: Wed, 13 Feb 2019 00:00:00 +0000 Full Article
ex The Militarization of the Black Sea After the Annexation of Crimea By feedproxy.google.com Published On :: Wed, 13 Mar 2019 00:00:00 +0000 Full Article