Category Ranking

98%

Total Visits

921

Avg Visit Duration

2 minutes

Citations

20

Article Abstract

Histone-like nucleoid structuring (H-NS) and H-NS-like proteins coordinate host-associated behaviors in many pathogenic bacteria, often through forming silencer/counter-silencer pairs with signal-responsive transcriptional activators to tightly control gene expression. and related bacteria do not encode H-NS or homologs of known H-NS-like proteins, and it is unclear if they have other proteins that perform analogous functions during pathogenesis. In this work, we provide compelling evidence for the role of MucR as a novel H-NS-like protein in . We show that MucR possesses many of the known functions attributed to H-NS and H-NS-like proteins, including the formation of silencer/counter-silencer pairs to control virulence gene expression and global structuring of the nucleoid. These results uncover a new role for MucR as a nucleoid structuring protein and support the importance of temporal control of gene expression in and related bacteria.

Download full-text PDF

Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10746212PMC
http://dx.doi.org/10.1128/mbio.02201-23DOI Listing

Publication Analysis

Top Keywords

h-ns-like proteins
12
gene expression
12
h-ns-like protein
8
nucleoid structuring
8
h-ns h-ns-like
8
silencer/counter-silencer pairs
8
control gene
8
expression bacteria
8
role mucr
8
h-ns-like
5

Similar Publications

Background: Bacteria rely on an arsenal of weapons to challenge their opponents in highly competitive environments. To specifically counter closely related bacteria, specialized weapons with a narrow activity spectrum are deployed, particularly contractile phage tail-like particles or R-tailocins. Their production leads to the lysis of the producing cells, indicating that their expression must be carefully orchestrated so that only a small percentage of cells produce R-tailocins for the benefit of the entire population.

View Article and Find Full Text PDF

Conjugative plasmids are widespread among prokaryotes, highlighting their evolutionary success. Conjugation systems on most natural plasmids are repressed by default. The negative regulation of F-plasmid conjugation is partially mediated by the chromosomal nucleoid-structuring protein (H-NS).

View Article and Find Full Text PDF
Article Synopsis
  • MucR is a transcriptional regulator found in Brucella species that influences gene expression related to virulence by binding to AT-rich DNA regions.
  • MucR is part of the Ros/MucR family in α-proteobacteria and shares functional similarities with H-NS proteins, although they lack sequence homology.
  • This study uses cryo-EM and other methods to reveal that MucR and its homolog Ml5 form a unique circular structure that can condense DNA, linking nucleoid structure to transcription regulation.
View Article and Find Full Text PDF

Despite the ever-growing research interest in polyhydroxyalkanoates (PHAs) as green plastic alternatives, our understanding of the regulatory mechanisms governing PHA synthesis, storage, and degradation in the model organism Ralstonia eutropha remains limited. Given its importance for central carbon metabolism, PHA homeostasis is probably controlled by a complex network of transcriptional regulators. Understanding this fine-tuning is the key for developing improved PHA production strains thereby boosting the application of PHAs.

View Article and Find Full Text PDF
Article Synopsis
  • MucR is part of a protein family that plays a crucial role in regulating virulence and symbiosis genes in α-proteobacteria.
  • Recent research has redefined MucR from a classical transcriptional regulator to a unique Histone-like Nucleoid Structuring (H-NS) protein.
  • The review aims to compile genetic and biochemical evidence showing that MucR binds to AT-rich DNA regions, influencing gene expression differently than traditional regulators.
View Article and Find Full Text PDF