The soxRS redox stress regulon of Escherichia coli is triggered in two stages, with the activated SoxR protein stimulating the soxS gene, whose product then triggers transcription of approximately 10 promoters. Genetic and biochemical experiments presented here show that SoxS protein also limits soxS transcription in vivo and binds the soxS promoter in vitro.
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http://dx.doi.org/10.1128/jb.175.22.7492-7494.1993 | DOI Listing |
Sci Rep
January 2025
Department of Biological Sciences, University of Calgary, Calgary, AB, T2N 1N4, Canada.
Metals have been used throughout history to manage disease. With the rising incidence of antibiotic-resistant bacterial strains, metal-based antimicrobials (MBAs) have re-emerged as an alternative to combat infections. Gallium nitrate has shown promising efficacy against several pathogens.
View Article and Find Full Text PDFSci Rep
January 2025
Department of Cell and Molecular Biology, Uppsala University, Uppsala, Sweden.
Antimicrobial resistance (AMR) is an increasing problem worldwide, and new treatment options for bacterial infections are direly needed. Engineered probiotics show strong potential in treating or preventing bacterial infections. However, one concern with the use of live bacteria is the risk of the bacteria acquiring genes encoding for AMR or virulence factors through horizontal gene transfer (HGT), and the transformation of the probiotic into a superbug.
View Article and Find Full Text PDFNat Commun
January 2025
Laboratory of Structural Biochemistry, Institute of Chemistry and Biochemistry, Freie Universität Berlin, Berlin, Germany.
Many bacteriophages modulate host transcription to favor expression of their own genomes. Phage satellite P4 polarity suppression protein, Psu, a building block of the viral capsid, inhibits hexameric transcription termination factor, ρ, by presently unknown mechanisms. Our cryogenic electron microscopy structures of ρ-Psu complexes show that Psu dimers clamp two inactive, open ρ rings and promote their expansion to higher-oligomeric states.
View Article and Find Full Text PDFNucleic Acids Res
January 2025
Institut de Mathématiques de Jussieu - Paris Rive Gauche (IMJ-PRG), UMR 7586, CNRS, Université Paris Diderot, 8, Pace Aurélie Nemours, 75013 Paris, France.
Accurate protein synthesis requires ribosomes to integrate signals from distant functional sites and execute complex dynamics. Despite advances in understanding ribosome structure and function, two key questions remain: how information is transmitted between these distant sites, and how ribosomal movements are synchronized? We recently highlighted the existence of ribosomal protein networks, likely evolved to participate in ribosome signaling. Here, we investigate the relationship between ribosomal protein networks and ribosome dynamics.
View Article and Find Full Text PDFJ Hosp Infect
January 2025
Infectious Diseases, Department of Internal Medicine I, University Hospital Tübingen, Tübingen, Germany; Infectious Diseases, Dept of Diagnostic and Public Health, University Hospital Verona, Verona, Italy; DZIF-Clinical Research Unit, Infectious Diseases, Department of Internal Medicine I, University Hospital Tübingen, Tübingen, Germany.
Background: ESBL-producing Enterobacterales (ESBL-PE) are highly prevalent in long-term healthcare (LTCF) settings. In order to estimate the acquisition rate of ESBL-producing Escherichia coli and Klebsiella pneumoniae in LTCF settings and identify clinical and environmental risk factors, a multicentric, prospective cohort study was conducted in six LTCFs in Germany, France, Spain and the Netherlands.
Methods: Longitudinal screening of residents was performed over 32 weeks, collecting epidemiological and clinical data and environmental samples.
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