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© Pierre Gounon
Entrée de Listeria dans une cellule épithéliale (Grossissement X 10000). Image colorisée.
Publication : FEMS microbiology letters

Characterization of a large motility gene cluster containing the cheR, motAB genes of Listeria monocytogenes and evidence that PrfA downregulates motility genes

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in FEMS microbiology letters - 15 Dec 1998

Michel E, Mengaud J, Galsworthy S, Cossart P

Link to Pubmed [PMID] – 9868779

FEMS Microbiol. Lett. 1998 Dec;169(2):341-7

Through the analysis of a non-motile mutant of Listeria monocytogenes, we identified and characterized a locus containing the cheR, motA and motB genes. These three genes are homologous to the cheR, and motA/B genes of Bacillus subtilis which in this organism are 954 kb apart. The gene organization in Listeria is also not similar either to that of Escherichia coli in which cheR and motAB are 5.9 kb apart. CheR and motA/B, as previously reported for flaA, the flagellin gene, are thermoregulated with a higher expression at 25 degrees C and low expression at 37 degrees C. In a delta prfA strain, motA expression was derepressed at 37 degrees C, suggesting that PrfA, the transcriptional activator of virulence genes, downregulates motility genes in Listeria at 37 degrees C.

http://www.ncbi.nlm.nih.gov/pubmed/9868779