pbp2229-mediated nisin resistance mechanism in Listeria monocytogenes confers cross-protection to class IIa bacteriocins and affects virulence gene expression

Article Abstract:

A mechanistic understanding of nisin resistance is provided, and an assessment of whether the development of bacteriocin resistance can concomitantly confer reduced sensitivity to other bacteriocins or changes in virulence, is made. The role in the nisin resistance mechanism of three genes that showed increased expression in certain nisin-resistant mutants is determined.

Microbiological research, Bacteriocins

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Restriction fragment differential display of pediocin-resistant Listeria monocytogenes 412 mutants shows consistent overexpression of a putative beta-glucoside-specific PTS system

Article Abstract:

Results demonstrate that restriction fragment differential display coupled with polymerase chain reaction analysis of the gene expression in Listeria reveal gene fragments exhibiting homology to beta-glucoside-specific phosphoenolpyruvate-dependent phosphotransferase systems from pediocin-resistant mutants.

United States, Analysis, Physiological aspects, Drug resistance in microorganisms, Microbial drug resistance, Microbial metabolism

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Development of a Listeria monocytogenes EGDe partial proteome reference map and comparison with the protein profiles of food isolates

Article Abstract:

Research has been conducted on molecular constituents of Listeria monocytogenes. The authors describe the construction of protein 2-D reference map of abundant proteins in exponentially dividing cells under optimal growth conditions carried out via the use pf L. monocytogenes EGDe as a model organism.

Germany, South Africa, Environmental aspects, Cells (Biology), Growth, Microbiology, Cells, Bacterial proteins, Microbial populations, Company growth, Microbial ecology

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