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Role of R5 Pyocin in the Predominance of High-Risk Isolates.
bioRxiv
October 2024
Department of BioSciences, Rice University, Houston, TX, United States.
Infections with antimicrobial resistant pathogens, such as are a frequent occurrence in healthcare settings. Human infections are predominantly caused by a small number of sequence types (ST), such as ST235, ST111, and ST175. Although ST111 is recognized as one of the most prevalent high-risk clones worldwide and frequently exhibits multidrug-resistant or extensively drug-resistant phenotypes, the basis for this dominance remains unclear.
View Article and Find Full Text PDFA pyocin-like T6SS effector mediates bacterial competition in .
Microbiol Spectr
June 2024
State Key Laboratory for Crop Stress Resistance and High-Efficiency Production, Shaanxi Key Laboratory of Agricultural and Environmental Microbiology, College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, China.
Article Synopsis
- - The text discusses bacteriocins, specifically colicin and pyocin, produced by Gram-negative bacteria, which exert toxicity through secretion and interaction with cell membrane receptors, primarily targeting closely related bacterial species.
- - The research focuses on YPK_0952, a newly identified pyocin-like effector associated with the Type VI secretion system (T6SS-3), which can enhance competitive advantages and intestinal colonization by degrading the nucleic acids of competing cells.
- - YPK_0952 exhibits DNase activity reliant on certain metal ions, and its corresponding immune protein, YPK_0953, protects it from self-damage, highlighting the complexity of bacterial competition and the potential for future studies on effector proteins in bacterial interactions
To kill or to be killed: pangenome analysis of Escherichia coli strains reveals a tailocin specific for pandemic ST131.
BMC Biol
June 2022
Genome Institute of Singapore (GIS), Agency for Science, Technology and Research (A*STAR), 60 Biopolis Street, Singapore, 138672, Republic of Singapore.
Background: Escherichia coli (E. coli) has been one of the most studied model organisms in the history of life sciences. Initially thought just to be commensal bacteria, E.
View Article and Find Full Text PDFGenomic Analysis of Carbapenem-Resistant Isolated From Urban Rivers Confirms Spread of Clone Sequence Type 277 Carrying Broad Resistome and Virulome Beyond the Hospital.
Front Microbiol
September 2021
Department of Clinical Analysis, School of Pharmacy, University of São Paulo, São Paulo, Brazil.
The dissemination of antibiotic-resistant priority pathogens beyond hospital settings is both a public health and an environmental problem. In this regard, high-risk clones exhibiting a multidrug-resistant (MDR) or extensively drug-resistant (XDR) phenotype have shown rapid adaptation at the human-animal-environment interface. In this study, we report genomic data and the virulence potential of the carbapenemase, São Paulo metallo-β-lactamase (SPM-1)-producing strains (Pa19 and Pa151) isolated from polluted urban rivers, in Brazil.
View Article and Find Full Text PDFHeterogenous Susceptibility to R-Pyocins in Populations of Pseudomonas aeruginosa Sourced from Cystic Fibrosis Lungs.
mBio
May 2021
Center for Microbial Dynamics & Infection, School of Biological Sciences, Georgia Institute of Technology, Atlanta, Georgia, USA
Bacteriocins are proteinaceous antimicrobials produced by bacteria that are active against other strains of the same species. R-type pyocins are phage tail-like bacteriocins produced by Due to their antipseudomonal activity, R-pyocins have potential as therapeutics in infection. is a Gram-negative opportunistic pathogen and is particularly problematic for individuals with cystic fibrosis (CF).
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