Arbitrium is a communication system that helps bacteriophages decide between lysis and lysogeny via secreted peptides. In arbitrium, the AimP peptide binds its cognate AimR receptor to repress aimX ex...

The Helmholtz Institute for RNA-based Infection Researchopens a call for

As a leading research institution for microbial biotechnology the Institute of Bio- and Geosciences - Biotechnology (IBG-1, https://www.fz-juelich.de/de/ibg/ibg-1 ) at the Forschungszentrum Jülich foc...

This structure of an archaeal tailed virus (arTV) provides detailed insights into arTV assembly and infection mechanisms.

Structural RNAs exhibit a vast array of recurrent short three-dimensional (3D) elements found in loop regions involving non-Watson–Crick interactions that help arrange canonical double helices into tertiary structures. Here we present CaCoFold-R3D, a probabilistic grammar that predicts these RNA 3D motifs (also termed modules) jointly with RNA secondary structure over a sequence or alignment. CaCoFold-R3D uses evolutionary information present in an RNA alignment to reliably identify canonical helices (including pseudoknots) by covariation. Here we further introduce the R3D grammars, which also exploit helix covariation that constrains the positioning of the mostly noncovarying RNA 3D motifs. Our method runs predictions over an almost-exhaustive list of over 50 known RNA motifs (‘everything’). Motifs can appear in any nonhelical loop region (including three-way, four-way and higher junctions) (‘everywhere’). All structural motifs as well as the canonical helices are arranged into one single structure predicted by one single joint probabilistic grammar (‘all-at-once’). Our results demonstrate that CaCoFold-R3D is a valid alternative for predicting the all-residue interactions present in a RNA 3D structure. CaCoFold-R3D is fast and easily customizable for novel motif discovery and shows promising value both as a strong input for deep learning approaches to all-atom structure prediction as well as toward guiding RNA design as drug targets for therapeutic small molecules.

Adherent-invasive strains of E. coli are commonly isolated from patients with Crohn’s disease. Here, the authors show that an AIEC harbours a hybrid Type IV secretion system (T4SS) that mediates pilin polymerization and biofilm formation in vivo.

Kubota et al. show that bacteria can use their filamentous phage to outcompete other bacteria, but increased phage production enables the evolution of cheater miniphages with truncated genomes. Miniph...

The Panoptes antiphage system defends bacteria by detecting phage-encoded counter-defences that sequester cyclic nucleotide signals, triggering membrane disruption and highlighting a broader strategy of sensing immune evasion through second-messenger surveillance.

Humans and animals are ubiquitously colonized by Enterobacteriaceae , a bacterial family that contains both commensals and clinically significant pathogens. Here, we report Enterobacteriaceae megaplas...

Panoptes, an anti-phage defence system against virus-mediated immune suppression, is revealed.

CBASS systems trigger bacterial suicide via membrane disruption. Here, authors show that effector CapV relocates to the cell pole upon sensing 3’3’-cGAMP, where it cleaves phospholipids and ruptures membranes, revealing a filament-dependent activation mechanism for antiviral defense

The advent of system-wide proteomic approaches has largely expanded the number of RNA-binding proteins (RBPs). This review discusses how recent discoveries are transforming our understanding of biolog...

In this study, the authors determine the structure of a Type I-A retron from E. coli FORC82 and reveal the functional interplay between Reverse Transcriptases (RTs) and Structural Maintenance of Chromosomes (SMC) ATPases.’

Gene redundancy complicates systematic characterization of gene function as single-gene deletions may not produce discernible phenotypes. We report dual transposon sequencing (dual Tn-seq), a platform...

It is not only antibiotics but also certain viruses – known as bacteriophages – that can kill off pathogenic bacteria. However, Switzerland lacks the legal framework for the use of these viruses in th...