Egypt’s courts must listen to dozens of Nobel prizewinners who have defended the founder of the Alexandria Library.
Studies highlight link between immune response and unusual neural wiring.
Another explanation offered for one of animal kingdom’s most distinctive features.
Reviewers and a co-author of a paper by genomics entrepreneur Craig Venter claim that it misrepresents the risks of public access to genome data.
UK government document fails to extinguish concerns over funding and migration.
Regulations are deterring research that could lead to disease treatments, say scientists.
As strains on the desert nation’s supply increase, scientists collaborate on projects to keep water flowing.
The United States is set to trial a version that will also cover race and disability, while other countries have already embraced the voluntary rating system.
Entrepreneurs are finding profits turning human waste into fertiliser, fuel and even food.
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Bacteria that can oxidize both ammonia to nitrite and nitrite to nitrate seem to be better adapted to ammonia-limited environments than most cultured microbes that oxidize ammonia to nitrite only, contrary to expectations. See Letter p.269
Experiments reveal that the laws governing the immediate aftermath of the Big Bang also apply to the behaviour of coupled lasers. The findings could be used to solve complex computational problems.
Cellular diversity can hamper cancer treatment. Analysis of tumour cell-division patterns now reveals how such heterogeneity can arise by a hierarchical pattern of stem-cell divisions yielding a mosaic of different cells. See Article p.227
Glaciers in the high mountains of Asia are a crucial water resource, but are at risk from global warming. Modelling suggests that the glaciers will shed mass in direct proportion to the warming to which they are exposed. See Letter p.257
Polypterid fish were considered to be archaic outliers of the bony-fish grouping. Fossil analysis now places them at the heart of early ray-finned fishes, a radical change that transforms the timing of their evolution. See Letter p.265
The direct conversion of heat into electricity — a reversible process known as the thermoelectric effect — can be greatly enhanced in some materials by embedding them with a small number of magnetic nanoparticles. See Letter p.247
An overview of the nature and timescales of stratospheric ozone recovery and the extent to which it can currently be detected.
The 4D Nucleome Network aims to develop and apply approaches to map the structure and dynamics of the human and mouse genomes in space and time with the goal of gaining deeper mechanistic insights into how the nucleus is organized and functions. The project will develop and benchmark experimental and computational approaches for measuring genome conformation and nuclear organization, and investigate how these contribute to gene regulation and other genome functions. Validated experimental technologies will be combined with biophysical approaches to generate quantitative models of spatial genome organization in different biological states, both in cell populations and in single cells.
Using unique barcodes for tumour cells, the authors explore the dynamics of human glioblastoma subpopulations, and suggest that clonal heterogeneity emerges through stochastic fate decisions of a neutral proliferative hierarchy.
Cryo-electron microscopy snapshots of the E. coli flippase MsbA at discrete functional states reveal a ‘trap and flip’ mechanism for lipopolysaccharide flipping and the conformational transitions of MsbA during its substrate transport cycle.
Titanium oxide, water, sodium and a strongly scattering haze have been detected in the atmosphere of the hot Jupiter exoplanet WASP-19b.
The ground-state energy of small molecules is determined efficiently using six qubits of a superconducting quantum processor.
By embedding superparamagnetic nanoparticles in a thermoelectric matrix, phonon and electron transport within the material can be controlled simultaneously at nanometre and mesoscopic length scales, thereby improving the thermoelectric performance of the material.
A non-invasive scanning magnetometer, based on a single nitrogen–vacancy defect in diamond, visualizes antiferromagnetic order at the nanometre scale in thin films of bismuth ferrite at room temperature.
Models show that even if global temperature rise can be limited to 1.5 degrees Celsius, only about 65 per cent of glacier mass will remain in the high mountains of Asia by the end of this century, and if temperatures rise by more than this the effects will be much more extreme.
A synthesis of 67 biodiversity studies shows that, after controlling for environmental covariates, the effects of biodiversity on biomass are stronger in nature than in experiments and are comparable to the effects of other drivers of productivity.
High-resolution scans of fossilized fish skulls suggest that modern ray-finned fishes originated later than previously thought and necessitate reconsideration of the evolution of this major vertebrate group.
A pure culture of the complete nitrifier Nitrospira inopinata shows a high affinity for ammonia, low maximum rate of ammonia oxidation, high growth yield compared to canonical nitrifiers and genomic potential for alternative metabolisms, probably reflecting an important role in nitrification in oligotrophic environments.
N6-methyladenosine (m6A) has been identified as the most abundant modification on eukaryote messenger RNA (mRNA) 1. Although the rapid development of high-throughput sequencing technologies has enabled insight into the biological functions of m6A modification2–13, the function of m6A during vertebrate embryogenesis remains poorly understood. Here we show that m6A determines cell fate during the endothelial-to-haematopoietic transition (EHT) to specify the earliest haematopoietic stem/progenitor cells (HSPCs) during zebrafish embryogenesis. m6Aspecific methylated RNA immunoprecipitation combined with high-throughput sequencing (MeRIP–seq) and m6A individualnucleotide-resolution cross-linking and immunoprecipitation with sequencing (miCLIP–seq) analyses reveal conserved features on zebrafish m6A methylome and preferential distribution of m6A peaks near the stop codon with a consensus RRACH motif. In mettl3-deficient embryos, levels of m6A are significantly decreased and emergence of HSPCs is blocked. Mechanistically, we identify that the delayed YTHDF2-mediated mRNA decay of the arterial endothelial genes notch1a and rhoca contributes to this deleterious effect. The continuous activation of Notch signalling in arterial endothelial cells of mettl3-deficient embryos blocks EHT, thereby repressing the generation of the earliest HSPCs. Furthermore, knockdown of Mettl3 in mice confers a similar phenotype. Collectively, our findings demonstrate the critical function of m6A modification in the fate determination of HSPCs during vertebrate embryogenesis.
Group 2 innate lymphoid cells express the neuromedin U receptor 1 (NMUR1) and respond to neuromedin U (NMU) released by adjacent enteric neurons, and this interaction results in an enhanced immediate early response to the nematode Nippostrongylus brasiliensis.
Intestinal type 2 innate lymphoid cells express the neuropeptide receptor NMUR1, which makes them responsive to neuronal neuromedin U, thereby promoting a type 2 cytokine response and accelerated expulsion of the gastro-intestinal nematode Nippostrongylus brasiliensis.
Crystal structures of the Polycomb-like proteins PHF1 and MTF2 with bound DNA and histone peptides show that extended homologous regions of the two proteins form a winged-helix structure that has an unexpected mechanism of binding to unmethylated CpG-containing DNA motifs.