Abstract:
:Reversible phase variation between the rugose and smooth colony variants is predicted to be important for the survival of Vibrio cholerae in natural aquatic habitats. Microarray expression profiling studies of the rugose and smooth variants of the same strain led to the identification of 124 differentially regulated genes. Further expression profiling experiments showed how these genes are regulated by the VpsR and HapR transcription factors, which, respectively, positively and negatively regulate production of VPS(El Tor), a rugose-associated extracellular polysaccharide. The study of mutants of rpoN and rpoS demonstrated the effects of these alternative sigma factors on phase variation-specific gene expression. Bioinformatics analysis of these expression data shows that 'rugosity' and 'smoothness' are determined by a complex hierarchy of positive and negative regulators, which also affect the biofilm, surface hydrophobicity and motility phenotypes of the organism.
journal_name
Mol Microbioljournal_title
Molecular microbiologyauthors
Yildiz FH,Liu XS,Heydorn A,Schoolnik GKdoi
10.1111/j.1365-2958.2004.04154.xsubject
Has Abstractpub_date
2004-07-01 00:00:00pages
497-515issue
2eissn
0950-382Xissn
1365-2958pii
MMI4154journal_volume
53pub_type
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