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More than 400 parallel enrichment experiments from goat faeces are analysed using metagenomics to evaluate how substrate and antibiotic selection affect membership, activity, stability and chemical productivity of herbivore gut microbiomes.

Whole-genome sequencing, transcriptome-wide association and fine-mapping analyses in over 7,000 individuals with critical COVID-19 are used to identify 16 independent variants that are associated with severe illness in COVID-19.

The authors generate a genome-wide dataset of 102 individuals who lived in Crete, the Greek mainland and the Aegean islands between the Neolithic and the Iron Age, identifying high levels of biological and cultural connectedness within the ancient Aegean.

Wastewater treatment plants are important reservoirs of antibiotic resistance genes (ARGs). Here, the authors analyze ARGs in a global collection of samples from wastewater treatment plants across six continents, providing insights into biotic and abiotic mechanisms that appear to control ARG diversity and distribution.

Mutations in LRRK2 kinase are associated with Parkinson’s disease. Here the authors show that LRRK2 modulates propagation of α-synuclein, using rodent and C. elegans models, and show that this is dependent on phosphorylation of one of its substrates, RAB35.

Genotype and exome sequencing of 150,000 participants and whole-genome sequencing of 9,950 selected individuals recruited into the Mexico City Prospective Study constitute a valuable, publicly available resource of non-European sequencing data.

Chemical and structural imaging of Komodo dragon teeth reveals that they maintain their sharp cutting edges through iron-enriched coatings, a unique adaptation compared with theropod dinosaurs (for which they have previously been used as an extant model).

Plasma turbulence is the main driver to deteriorate the performance of fusion power plants. This work presents an unprecedented comparison of plasma turbulence between experiment and simulation, proving that the gyrokinetic model GENE reached a high level of maturity to predict core turbulence.

The Human Microbiome Project Consortium has established a population-scale framework to study a variety of microbial communities that exist throughout the human body, enabling the generation of a range of quality-controlled data as well as community resources.

Analysis of lower respiratory tract microbiome of mechanically ventilated COVID-19 patients rules out a role for secondary respiratory infections as drivers of increased mortality.

The missense TLR7^Y264H gain-of-function genetic variation causes systemic lupus erythematosus in humans and mice.

In a mouse model of Huntington's disease, synaptic activation of NMDA receptors induces the formation of huntingtin-containing inclusions, rendering neurons more resistant to death in vivo and in vitro. In contrast, stimulation of extrasynaptic NMDA receptors increases neuronal vulnerability by preventing inclusion formation.

The Human Microbiome Project Consortium reports the first results of their analysis of microbial communities from distinct, clinically relevant body habitats in a human cohort; the insights into the microbial communities of a healthy population lay foundations for future exploration of the epidemiology, ecology and translational applications of the human microbiome.

Enrichment of oral microbiota in the bronchoalveolar lavage of apparently healthy people is associated with a pro-inflammatory phenotype, suggesting that aspiration-derived microbiota play a role in regulating basal inflammatory status.

Dimethyl fumarate (DMF) is an anti-inflammatory drug proposed as a treatment for COVID19. Here the results are reported from a randomised trial testing DMF treatment in 713 patients hospitalised with COVID-19. DMF was not associated with any improvement in day 5 outcomes.

The effect of diet-induced obesity on intestinal B cell populations is not well understood despite emerging evidence of a critical role for the intestinal immune system in contributing to insulin resistance. Here, the authors show important functions of IgA in regulating metabolic disease and for intestinal immunity in modulating systemic glucose metabolism.

Implantable cardiac defibrillators (ICD) are effective in reducing mortality in patient populations at risk for sudden cardiac death, but transvenous ICDs are associated with complications such as infections, pneumothorax, venous thrombosis, lead dislodgement, lead malfunction, and haemopericardium. In this Review, Lewis and Gold describe a novel design of entirely subcutaneous ICDs that avoid some of the complications of transvenous systems, and explore the advantages and disadvantages of both ICD systems.

Whole-genome sequencing of individuals from 125 populations provides insight into patterns of genetic diversity, natural selection and human demographic history during the peopling of Eurasia and finds evidence for genetic vestiges of an early expansion of modern humans out of Africa in Papuans.

Global sampling of microbial communities associated with wastewater treatment plants and application of ecological theory revealed a small, core bacterial community associated with performance and provides insights into the community dynamics in this environment.

Nanoparticles coated with autoantigenic peptides bound to MHC class II molecules suppress established autoimmune disease by inducing antigen-specific T_R1-like regulatory T cells in mouse and humanized mouse models.

Roy, Zhang et al. discuss how modern neuroscience is revealing underappreciated heterogeneity in thalamic cell types, which leads to the idea that ‘thalamic subnetworks’ provide a more appropriate level of functional description than thalamic nuclei.

The mechanisms of Z-ring assembly and regulation in bacteria are poorly understood, particularly in non-model organisms. Here, Sogues et al. study the interaction between FtsZ and SepF in Corynebacterium glutamicum, showing an essential interdependence of these proteins for formation of a functional Z-ring.

This study shows that neuroligin-1, a trans-synaptic cell adhesion molecule for excitatory synapses, is directly phosphorylated by Ca²⁺/CaM kinase II in a neuronal activity–dependent manner in vitro and in vivo. The authors also show that this post-translational modification of neuroligin-1 regulates excitatory synaptic potentiation.

An in vitro system that generates three-dimensional cultures of extraembryonic fetal trophoblast cells that differentiate into the two main types of trophoblast can be used to study human placental development.

In an inter-laboratory study, the authors compare the accuracy and performance of three optical density calibration protocols (colloidal silica, serial dilution of silica microspheres, and colony-forming unit (CFU) assay). They demonstrate that serial dilution of silica microspheres is the best of these tested protocols, allowing precise and robust calibration that is easily assessed for quality control and can also evaluate the effective linear range of an instrument.