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Laboratory evolution in enables rapid catabolism of a model lignin-derived aromatic dimer.
Appl Environ Microbiol
January 2025
Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA.
Lignin contains a variety of interunit linkages, leading to a range of potential decomposition products that can be used as carbon and energy sources by microbes. β-O-4 linkages are the most common in native lignin, and associated catabolic pathways have been well characterized. However, the fate of the mono-aromatic intermediates that result from β-O-4 dimer cleavage has not been fully elucidated.
View Article and Find Full Text PDFYgiV promoter mutations cause resistance to cystobactamids and reduced virulence factor expression in Escherichia coli.
NPJ Antimicrob Resist
November 2024
Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre for Infection Research (HZI) and Saarland University Department of Pharmacy, Campus Building E8.1, 66123, Saarbrücken, Germany.
Antimicrobial resistance is one of the major health threats of the modern world. Thus, new structural classes of antimicrobial compounds are needed in order to overcome existing resistance. Cystobactamids represent one such new compound class that inhibit the well-established target bacterial type II topoisomerases while exhibiting superior antibacterial and resistance-breaking properties.
View Article and Find Full Text PDFAdvances in understanding dietary fiber: Classification, structural characterization, modification, and gut microbiome interactions.
Compr Rev Food Sci Food Saf
January 2025
Department of Food Science and Technology, Virginia Tech, Blacksburg, Virginia, USA.
Gut microbiota and their metabolites profoundly impact host physiology. Targeted modulation of gut microbiota has been a long-term interest in the scientific community. Numerous studies have investigated the feasibility of utilizing dietary fibers (DFs) to modulate gut microbiota and promote the production of health-beneficial bacterial metabolites.
View Article and Find Full Text PDFGut Microbiota Metabolites Sensed by Host GPR41/43 Protect Against Hypertension.
Circ Res
January 2025
Hypertension Research Laboratory, School of Biological Sciences (R.R.M., T.Z., E.D., L.X., A.B.-W., H.A.J., M.N., M.P., K.C.L., W.Q., J.A.O.D., F.Z.M.).
Background: Fermentation of dietary fiber by the gut microbiota leads to the production of metabolites called short-chain fatty acids, which lower blood pressure and exert cardioprotective effects. Short-chain fatty acids activate host signaling responses via the functionally redundant receptors GPR41 and GPR43, which are highly expressed by immune cells. Whether and how these receptors protect against hypertension or mediate the cardioprotective effects of dietary fiber remains unknown.
View Article and Find Full Text PDFHighly Potent New Probiotic Strains from Traditional Turkish Fermented Foods.
Curr Microbiol
January 2025
Department of Nanotechnology Engineering, Abdullah Gul University, Kayseri, Türkiye.
Traditional Turkish fermented foods like boza, pickles, and tarhana are recognized for their nutritional and health benefits, yet the probiotic potential of lactic acid bacteria (LAB) strains isolated from them remains underexplored. Sixty-six LAB strains were isolated from fermented foods using bacterial morphology, Gram staining, and catalase activity. The isolates were differentiated at strain level by RAPD-PCR (Random Amplification of Polymorphic DNA-Polymerase Chain Reaction) and twenty-five strains were selected for further evaluation of acid and bile salt tolerance.
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