A recurrent nova, known as the Blaze Star or T Coronae Borealis, is predicted to soon appear in the night sky. But the exact timing of the rare eruption remains unknown

Prior to the new research, scientists had traced the source of just 6 percent of the known meteorites that fell on our planet

Colossal Biosciences reports it extracted DNA and RNA from the Tasmanian tiger specimen, a key step forward in its effort to create a modern proxy of the extinct species. Other scientists are calling for data to back up the claim

CRISPR–Cas9 has revolutionized gene editing for traditional and nontraditional model organisms alike. This tool has opened the door to new mechanistic studies of basic mosquito biology as well as the development of novel vector control strategies based on CRISPR–Cas9, including gene drives that spread genetic elements in the population. Although the promise of the specificity, flexibility, and ease of deployment CRISPR is real, its implementation still requires empirical optimization for each new species of interest, as well as to each genomic target within a given species. Here, we provide an overview of designing and testing single-guide RNAs for the use of CRISPR-based gene editing tools.

In Syria and across the Middle East, every actor embroiled in conflict is considered a terrorist by someone, making resolutions exceedingly difficult to achieve.

This paper examines the costs and benefits of the multiple currency phenomenon in Lao PDR and considers options in terms of policy response.

The South American lungfish has a whopping 180 gigabases of DNA in each cell, compared with 6 gigabases in human cells

Colossal, a US firm that is aiming to revive lost species such as the woolly mammoth, says it now has a near-complete genome of the extinct thylacine

A genetic study of nearly 2700 individuals has revealed the ancestry of Indian people, and gets scientists closer to reconstructing the genomes of ancient Neanderthals

Analysis of DNA from a Neanderthal fossil found in a French cave indicates that it belonged to a group that was isolated for more than 50,000 years

Title: Ancient Genome Appears to Have Links to Modern Humans
Category: Health News
Created: 8/30/2012 4:05:00 PM
Last Editorial Review: 8/31/2012 12:00:00 AM

Asgard archaea are of great interest as the progenitors of Eukaryotes, but little is known about the mobile genetic elements (MGEs) that may shape their ongoing evolution. Here, we describe MGEs that replicate in Atabeyarchaeia, a wetland Asgard archaea lineage represented by two complete genomes. We used soil depth–resolved population metagenomic data sets to track 18 MGEs for which genome structures were defined and precise chromosome integration sites could be identified for confident host linkage. Additionally, we identified a complete 20.67 kbp circular plasmid and two family-level groups of viruses linked to Atabeyarchaeia, via CRISPR spacer targeting. Closely related 40 kbp viruses possess a hypervariable genomic region encoding combinations of specific genes for small cysteine-rich proteins structurally similar to restriction-homing endonucleases. One 10.9 kbp integrative conjugative element (ICE) integrates genomically into the Atabeyarchaeum deiterrae-1 chromosome and has a 2.5 kbp circularizable element integrated within it. The 10.9 kbp ICE encodes an expressed Type IIG restriction-modification system with a sequence specificity matching an active methylation motif identified by Pacific Biosciences (PacBio) high-accuracy long-read (HiFi) metagenomic sequencing. Restriction-modification of Atabeyarchaeia differs from that of another coexisting Asgard archaea, Freyarchaeia, which has few identified MGEs but possesses diverse defense mechanisms, including DISARM and Hachiman, not found in Atabeyarchaeia. Overall, defense systems and methylation mechanisms of Asgard archaea likely modulate their interactions with MGEs, and integration/excision and copy number variation of MGEs in turn enable host genetic versatility.

Understanding the evolution of chromatin conformation among species is fundamental to elucidate the architecture and plasticity of genomes. Nonrandom interactions of linearly distant loci regulate gene function in species-specific patterns, affecting genome function, evolution, and, ultimately, speciation. Yet, data from nonmodel organisms are scarce. To capture the macroevolutionary diversity of vertebrate chromatin conformation, here we generate de novo genome assemblies for two cryptodiran (hidden-neck) turtles via Illumina sequencing, chromosome conformation capture, and RNA-seq: Apalone spinifera (ZZ/ZW, 2n = 66) and Staurotypus triporcatus (XX/XY, 2n = 54). We detected differences in the three-dimensional (3D) chromatin structure in turtles compared to other amniotes beyond the fusion/fission events detected in the linear genomes. Namely, whole-genome comparisons revealed distinct trends of chromosome rearrangements in turtles: (1) a low rate of genome reshuffling in Apalone (Trionychidae) whose karyotype is highly conserved when compared to chicken (likely ancestral for turtles), and (2) a moderate rate of fusions/fissions in Staurotypus (Kinosternidae) and Trachemys scripta (Emydidae). Furthermore, we identified a chromosome folding pattern that enables "centromere–telomere interactions" previously undetected in turtles. The combined turtle pattern of "centromere–telomere interactions" (discovered here) plus "centromere clustering" (previously reported in sauropsids) is novel for amniotes and it counters previous hypotheses about amniote 3D chromatin structure. We hypothesize that the divergent pattern found in turtles originated from an amniote ancestral state defined by a nuclear configuration with extensive associations among microchromosomes that were preserved upon the reshuffling of the linear genome.

Long noncoding (lnc)RNAs emerge as regulators of genome stability. The nuclear-enriched abundant transcript 1 (NEAT1) is overexpressed in many tumors and is responsive to genotoxic stress. However, the mechanism that links NEAT1 to DNA damage response (DDR) is unclear. Here, we investigate the expression, modification, localization, and structure of NEAT1 in response to DNA double-strand breaks (DSBs). DNA damage increases the levels and N6-methyladenosine (m⁶A) marks on NEAT1, which promotes alterations in NEAT1 structure, accumulation of hypermethylated NEAT1 at promoter-associated DSBs, and DSB signaling. The depletion of NEAT1 impairs DSB focus formation and elevates DNA damage. The genome-protective role of NEAT1 is mediated by the RNA methyltransferase 3 (METTL3) and involves the release of the chromodomain helicase DNA binding protein 4 (CHD4) from NEAT1 to fine-tune histone acetylation at DSBs. Our data suggest a direct role for NEAT1 in DDR.

The noncoding RNA BC200 is elevated in human cancers and is implicated in translation regulation as well as cell survival and proliferation. Upon BC200 overexpression, we observed correlated expression of a second, smaller RNA species. This RNA is expressed endogenously and exhibits cell-type-dependent variability relative to BC200. Aptamer-tagged expression constructs confirmed that the RNA is a truncated form of BC200, and sequencing revealed a modal length of 120 nt; thus, we refer to the RNA fragment as BC120. We present a methodology for accurate and specific detection of BC120 and establish that BC120 is expressed in several normal human tissues and is also elevated in ovarian cancer. BC120 exhibits remarkable stability relative to BC200 and is resistant to knockdown strategies that target the 3' unique sequence of BC200. Combined knockdown of BC200 and BC120 exhibits greater phenotypic impacts than knockdown of BC200 alone, and overexpression of BC120 negatively impacts translation of a GFP reporter, providing insight into a potential translational regulatory role for this RNA. The presence of a novel, truncated, and stable form of BC200 adds complexity to the investigation of this noncoding RNA that must be considered in future studies of BC200 and other related Alu RNAs.

Background

Pseudomonas aeruginosa is a common pathogen that contributes to progressive lung disease in cystic fibrosis (CF). Genetic factors other than CF-causing CFTR (CF transmembrane conductance regulator) variations contribute ~85% of the variation in chronic P. aeruginosa infection age in CF according to twin studies, but the susceptibility loci remain unknown. Our objective is to advance understanding of the genetic basis of host susceptibility to P. aeruginosa infection.

Alveolar capillary dysplasia (ACD) is a fatal disorder that typically presents in the neonatal period with refractory hypoxemia and pulmonary hypertension. Lung biopsy is traditionally required to establish the diagnosis. We report a 22-mo-old male who presented with anemia, severe pulmonary hypertension, and right heart failure. He had a complicated hospital course resulting in cardiac arrest and requirement for extracorporeal membrane oxygenation. Computed tomography of the chest showed a heterogenous pattern of interlobular septal thickening and pulmonary edema. The etiology of his condition was unknown, lung biopsy was contraindicated because of his medical fragility, and discussions were held to move to palliative care. Rapid whole-genome sequencing (rWGS) was performed. In 2 d it resulted, revealing a novel FOXF1 gene pathogenic variant that led to the presumptive diagnosis of atypical ACD. Cases of atypical ACD have been reported with survival in patients using medical therapy or lung transplantation. Based on the rWGS diagnosis and more favorable potential of atypical ACD, aggressive medical treatment was pursued. The patient was discharged home after 67 d in the hospital; he is currently doing well more than 30 mo after his initial presentation with only one subsequent hospitalization and no requirement for lung transplantation. Our case reveals the potential for use of rWGS in a critically ill child in which the diagnosis is unknown. rWGS and other advanced genetic tests can guide clinical management and expand our understanding of atypical ACD and other conditions.

It’s a slightly more potty mouthed cast than usual, as Alice joins Peter, Kelley, Anna Marie and Chris to discuss what the cast has been playing for the week. Anna Marie’s 5-hour rule resurfaces and we explore what crazy black holes Chris has been down this week, alongside the news and your feedback.

The post RPG Cast – Episode 543: “Go Find Gnome, Dumb***” appeared first on RPGamer.

A collective gasp echoed like a thunderclap in a valley in our Daily Beast newsroom late Wednesday afternoon at the news that singer Liam Payne, who became famous as a member of the group One Direction, died at age 31.

TMZ reports that Payne fell from a hotel balcony in Argentina, where he had reunited with bandmates at 1D-er Niall Horan’s concert. He had, according to the site, been behaving “erratically,” earlier in the day, and was spotted smashing a laptop in the hotel lobby and having to be carried back to his room. He had been in headlines on gossip blogs over tension with his ex-fiancée Maya Henry, who, TMZ says, alleged “he'd left her after asking her to get an abortion.”

In the shock of his death, fans couldn’t ignore the eerie nature that Payne had just connected with his One Direction bandmates. Dark questions emerge when a celebrity dies so young: What role did the often horrific toll of fame have on a person like Payne, who has been open about addiction and suicidal ideation? But there’s also an impulse to go back to the roots of a person’s talent, to revisit what it was that we all fell in love with—and was their passion—in the first place.

Read more at The Daily Beast.

A radio signal detected in 1977, sometimes claimed as evidence for aliens, may have been caused by a laser-like beam of microwave radiation

‘Little red dot’ galaxies seen by JWST appear to be much more tightly packed with stars than other galaxies, raising big questions about how they came to be this way

Five satellites due to launch this week could be brighter than most stars, and astronomers fear the growth of such constellations could have a catastrophic impact

Demand for observing time on Webb outpaces supply by a factor of nine.

Управляющий совет проекта Fedora утвердил придание сборке Fedora KDE Desktop Spin статуса базовой редакции дистрибутива, идентичной по уровню поддержки с Fedora Workstation. Таким образом, начиная с Fedora 42 варианты дистрибутива с GNOME и KDE будут иметь идентичный статус и станут преподноситься на равных. Среди прочего, Fedora KDE Plasma Desktop Edition получит аналогичный уровень маркетингового продвижения и будет иметь такое же представление на сайте fedoraproject.org. Специфичные для KDE серьёзные проблемы будут рассматриваться как блокирующие релиз, так же, как ранее блокировали релиз серьёзные проблемы в GNOME.

Study conducted by researchers from the Perelman School of Medicine at the University of Pennsylvania on genome editing in non-human primates highlights

The discovery of more than 50,000 unusual i-motif structures in DNA by researchers may provide innovative strategies for treating and diagnosing diseases

As many companies are trying to develop liquid biopsy for diagnosing and preventing cancer development, the San Diego-based genome sequencing company Illumina has also joined this group.

Nothing beats networking in the world of business marketing. It is perhaps one of the oldest and most effective ways of bringing your business in front of people who might be interested in it and also other businesses who might be in the...

[s.l.] : Mohr Siebeck GmbH & Co. KG, 2023.

Cambridge : Cambridge University Press, 2010.

[s.l.] : Mohr Siebeck GmbH & Co. KG, 2023.

München ; Wien : De Gruyter Oldenbourg, [2023]

[s.l.] : Oxbow Books, 2019.

Stohler, Lauren, author, illustrator

Abingdon, Oxon ; New York, NY : Routledge , 2025.

It's the end of the world in "Don't Look Up," and it's all thanks to a comet heading straight towards Earth. Dr. Amy Mainzer, a science consultant on "Don't Look Up," breaks down a few scenes from the film and explores the science behind near-Earth objects.

The election result in Sri Lanka must be viewed by India as faith in the self-renewing power of the democratic voice

Wiley-Blackwell

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