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A novel polysaccharide in the envelope of influences the septal secretion of preproteins with a YSIRK/GXXS motif.
J Bacteriol
January 2025
Department of Microbiology, Howard Taylor Ricketts Laboratory, The University of Chicago, Chicago, Illinois, USA.
Unlabelled: Bacteria transport proteins across the plasma membrane to assemble their envelope, acquire nutrients, and establish appropriate interactions with their environment. The majority of these proteins are synthesized as precursors with a cleavable N-terminal signal sequence for recognition by the Sec machinery. In , a small subset of secreted precursors carries a YSIRK/GXXS motif.
View Article and Find Full Text PDFBicarbonate Within: A Hidden Modulator of Antibiotic Susceptibility.
Antibiotics (Basel)
January 2025
Departments of Medicine and Medical Microbiology & Immunology, University of Wisconsin School of Medicine and Public Health, Madison, WI 53705, USA.
Since its standardization, clinical antimicrobial susceptibility testing (AST) has relied upon a standard medium, Mueller-Hinton Broth/Agar (MHB/A), to determine antibiotic resistance. However, this microbiologic medium bears little resemblance to the host milieu, calling into question the physiological relevance of resistance phenotypes it reveals. Recent studies investigating antimicrobial susceptibility in mammalian cell culture media, a more host-mimicking environment, demonstrate that exposure to host factors significantly alters susceptibility profiles.
View Article and Find Full Text PDFRecognition of by the pattern recognition molecules langerin, mannan-binding lectin, and surfactant protein D: the influence of capsular polysaccharides and wall teichoic acid.
Front Immunol
January 2025
Department of Biomedicine, Aarhus University, Aarhus, Denmark.
The innate immune system plays a critical role in the rapid recognition and elimination of pathogens through pattern recognition receptors (PRRs). Among these PRRs are the C-type lectins (CTLs) langerin, mannan-binding lectin (MBL), and surfactant protein D (SP-D), which recognize carbohydrate patterns on pathogens. Each represents proteins from different compartments of the body and employs separate effector mechanisms.
View Article and Find Full Text PDFWall teichoic acid glycosylation of bovine-associated Staphylococcus aureus strains.
Vet Microbiol
January 2025
Department Population Health Sciences, Division Farm Animal Health, Utrecht University, Utrecht, the Netherlands. Electronic address:
Staphylococcus aureus (S. aureus) is one of the major causes of bovine mastitis, a disease with detrimental effects on health and wellbeing. Current control measures are costly, laborious and not always effective in eradicating S.
View Article and Find Full Text PDFPostbiotic studies of mixed cultures of and B-5P produced b rumen producing short-chain fatty acid.
Vet World
November 2024
Research Organization of Agriculture and Food, National Research and Innovation Agency, Bogor, 16911, Indonesia.
Background And Aim: Postbiotics are functional bioactive compounds or bioactive molecules with beneficial effects on health and functional activities in humans or livestock, produced by probiotic bacteria or yeast. Several postbiotics, including enzymes, short-chain fatty acids, amino acids, extracellular polysaccharides, microbial cell fragments, and teichoic acids, are currently being widely studied. This study aimed to explore the potential of secondary metabolites of and as lactic acid bacteria (LAB) and yeast isolated from Budu (fermented fish) which can act as postbiotics through rumen fermentation.
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