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A plasmid-chromosome crosstalk in multidrug resistant enterobacteria.
Nat Commun
December 2024
Centro Nacional de Biotecnología (CNB-CSIC), Madrid, Spain.
Conjugative plasmids promote the dissemination and evolution of antimicrobial resistance in bacterial pathogens. However, plasmid acquisition can produce physiological alterations in the bacterial host, leading to potential fitness costs that determine the clinical success of bacteria-plasmid associations. In this study, we use a transcriptomic approach to characterize the interactions between a globally disseminated carbapenem resistance plasmid, pOXA-48, and a diverse collection of multidrug resistant (MDR) enterobacteria.
View Article and Find Full Text PDFBacteroides expand the functional versatility of a conserved transcription factor and transcribed DNA to program capsule diversity.
Nat Commun
December 2024
Department of Biochemistry, University of Wisconsin-Madison, Madison, WI, USA.
The genomes of human gut bacteria in the genus Bacteroides include numerous operons for biosynthesis of diverse capsular polysaccharides (CPSs). The first two genes of each CPS operon encode a locus-specific paralog of transcription elongation factor NusG (called UpxY), which enhances transcript elongation, and a UpxZ protein that inhibits noncognate UpxYs. This process, together with promoter inversions, ensures that a single CPS operon is transcribed in most cells.
View Article and Find Full Text PDFNeutral drift upon threshold-like selection promotes variation in antibiotic resistance phenotype.
Nat Commun
December 2024
Michael Smith Laboratories, University of British Columbia, Vancouver, V6T 1Z4, BC, Canada.
Heritable phenotypic variation plays a central role in evolution by conferring rapid adaptive capacity to populations. Mechanisms that can explain genetic diversity by describing connections between genotype and organismal fitness have been described. However, the difficulty of acquiring comprehensive data on genotype-phenotype-environment relationships has hindered the efforts to explain how the ubiquitously observed phenotypic variation in populations emerges and is maintained.
View Article and Find Full Text PDFEvaluation of the potential of multi-trait PGPR isolates as inoculants for maize () growth.
Iran J Microbiol
December 2024
Cellular and Molecular Research Center, School of Medicine, Guilan University of Medical Sciences, Rasht, Iran.
Background And Objectives: Plant growth-promoting rhizobacteria (PGPR) with a diverse set of traits can improve crop yield in agriculture. The current study aimed to evaluate the potential of multi-trait PGPR isolates as inoculants for maize growth.
Materials And Methods: In this study, 23 bacterial isolates were initially screened from maize plant rhizosphere.
Characterization and bioefficacy of grapevine bacterial endophytes against causing anthracnose disease.
Front Microbiol
December 2024
Indian Council of Agricultural Research-National Research Centre for Grapes, Pune, Maharashtra, India.
Introduction: Grapevine ( L.), one of the economically important fruit crops cultivated worldwide, harbours diverse endophytic bacteria (EBs) responsible for managing various fungal diseases. Anthracnose () (Penz.
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