P. H. Viollier

Regulation of the transcription factor CdnL promotes adaptation to nutrient stress in Caulobacter

This study shows that CdnL is downregulated during the stringent response in Caulobacter, and its clearance is essential for adaptation to nutrient fluctuations.

Interconversion of tripartite and bipartite systems for site-specific O-sialylation of flagellin in Gram-negative and Gram-positive bacteria

The paper reconstitutes two Maf-type fGT systems for flagellin sialylation, showing that Maf-1 is sufficient while Maf-2 requires GlfM, and identifies convergent evolution in bacterial glycosylation systems.

Co-chaperone-mediated post-translational control of efflux pump induction underlies adaptive β-lactam resistance in Caulobacter crescentus.

Genetic glyco-profiling and rewiring of insulated flagellin glycosylation pathways

The paper identifies two modular determinants in FlmG glycosyltransferases that govern flagellin glycosylation specificity through distinct glycosyltransferase and flagellin-binding domains.

The CTPase activity of ParB acts as a timing mechanism to control the dynamics and function of prokaryotic DNA partition complexes

This study identifies how ParB's CTPase activity regulates DNA partition complex dynamics and function by controlling clamp sliding time and spreading.

Cryptosporulation in Kurthia spp. forces a rethinking of asporogenesis in Firmicutes

The paper demonstrates endosporulation in the genus Kurthia, previously considered asporogenic, and proposes a revised understanding of sporulation in Firmicutes.

Bacterial cell cycle control by citrate synthase independent of enzymatic activity

The paper identifies CitA, a citrate synthase in Caulobacter crescentus, as a checkpoint regulator of the G1-to-S transition independent of its enzymatic activity.

Loss of Bacterial Cell Pole Stabilization in Caulobacter crescentus Sensitizes to Outer Membrane Stress and Peptidoglycan-Directed Antibiotics

This study shows that TipN in Caulobacter crescentus stabilizes cell envelope weak points and influences antibiotic resistance by modulating the ChvIG two-component system.

Molecular architecture of the DNA-binding sites of the P-loop ATPases MipZ and ParA from Caulobacter crescentus

This study identifies the DNA-binding residues of MipZ and ParA from Caulobacter crescentus, revealing sequence-independent electrostatic interactions and conserved binding mechanisms across ParA-like ATPases.

Bypass of an epigenetic S-phase transcriptional module by convergent nutrient stress signals

The paper shows that phosphate deprivation and (p)ppGpp stress signals bypass the GcrA/CcrM module to activate S-phase transcription in Caulobacter crescentus.

Bacterial cell cycle and growth phase switch by the essential transcriptional regulator CtrA

The paper identifies a conserved determinant in CtrA that controls promoter switching during the bacterial cell cycle, linking it to growth phase transitions and virulence.

A bifunctional ATPase drives tad pilus extension and retraction

This study identifies a bifunctional ATPase, CpaF, that drives both extension and retraction of tad pili in Caulobacter crescentus through ATP hydrolysis.

Cell Cycle Constraints and Environmental Control of Local DNA Hypomethylation in Alpha-Proteobacteria

The paper identifies how cell cycle regulators and environmental factors influence DNA hypomethylation patterns in alpha-proteobacteria.