Although the antimicrobial effects of silver salts were noticed long ago, the molecular mechanism of the bactericidal action of Ag(+) in low concentrations has not been elucidated. Here, we show that low concentrations of Ag(+) induce a massive proton leakage through the Vibrio cholerae membrane, which results in complete deenergization and, with a high degree of probability, cell death.
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http://dx.doi.org/10.1128/AAC.46.8.2668-2670.2002 | DOI Listing |
Nat Microbiol
January 2025
Biozentrum, University of Basel, Basel, Switzerland.
For any organism, survival is enhanced by the ability to sense and respond to threats in advance. For bacteria, danger sensing among kin cells has been observed, but the presence or impacts of general danger signals are poorly understood. Here we show that different bacterial species use exogenous peptidoglycan fragments, which are released by nearby kin or non-kin cell lysis, as a general danger signal.
View Article and Find Full Text PDFFront Microbiol
December 2024
Umeå Centre for Microbial Research (UCMR), Umeå University, Umeå, Sweden.
Lipoproteins are crucial for maintaining the structural integrity of bacterial membranes. In Gram-negative bacteria, the localization of lipoprotein (Lol) system facilitates the transport of these proteins from the inner membrane to the outer membrane. In , an ε-proteobacterium, lipoprotein transport differs significantly from the canonical and well-studied system in , particularly due to the absence of LolB and the use of a LolF homodimer instead of the LolCE heterodimer.
View Article and Find Full Text PDFNat Commun
January 2025
Department of Molecular, Cellular and Developmental Biology, Yale University, New Haven, CT, USA.
Biofilms are ubiquitous surface-associated bacterial communities embedded in an extracellular matrix. It is commonly assumed that biofilm cells are glued together by the matrix; however, how the specific biochemistry of matrix components affects the cell-matrix interactions and how these interactions vary during biofilm growth remain unclear. Here, we investigate cell-matrix interactions in Vibrio cholerae, the causative agent of cholera.
View Article and Find Full Text PDFJ Clin Microbiol
December 2024
Department of Pediatrics, University of Florida, Gainesville, Florida, USA.
Cholera rapid diagnostic tests (RDTs) are vulnerable to virulent bacteriophage predation. We hypothesized that an enhanced cholera RDT that detects the common virulent bacteriophage ICP1 might serve as a proxy for pathogen detection. We previously developed a monoclonal antibody (mAb) to the ICP1 major capsid protein.
View Article and Find Full Text PDFNucleic Acids Res
December 2024
Friedrich Schiller University, Institute of Microbiology, 07743 Jena, Germany.
Gene regulation at the post-transcriptional level is prevalent in all domains of life. In bacteria, ProQ-like proteins have emerged as important RNA chaperones facilitating RNA stability and RNA duplex formation. In the major human pathogen Vibrio cholerae, post-transcriptional gene regulation is key for virulence, biofilm formation, and antibiotic resistance, yet the role of ProQ has not been studied.
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