Chemotaxis inVibrio cholerae
نویسندگان
چکیده
منابع مشابه
Chemotaxis in Vibrio cholerae.
The ability of motile bacteria to swim toward or away from specific environmental stimuli, such as nutrients, oxygen, or light provides cells with a survival advantage, especially under nutrient-limiting conditions. This behavior, called chemotaxis, is mediated by the bacteria changing direction by briefly reversing the direction of rotation of the flagellar motors. A sophisticated signal trans...
متن کاملBoth chemotaxis and net motility greatly influence the infectivity of Vibrio cholerae.
The role of chemotaxis in the virulence of gastrointestinal pathogens is ill defined. Counterintuitively, nonchemotactic mutants of the polarly flagellated pathogen Vibrio cholerae greatly out-compete the wild-type strain during infection of the small intestine. We show that the out-competition phenotype is dependent on the direction of flagellar rotation and independent of Toxin Co-regulated P...
متن کاملAnalyses of the roles of the three cheA homologs in chemotaxis of Vibrio cholerae.
The Vibrio cholerae genome revealed the presence of multiple sets of chemotaxis genes, including three cheA gene homologs. We found that the cheA-2, but not cheA-1 or cheA-3, gene is essential for chemotaxis under standard conditions. Loss of chemotaxis had no effect on virulence factor expression in vitro.
متن کاملThe Vibrio cholerae ToxR Regulon Encodes Host-Specific Chemotaxis Proteins that Function in Intestinal Colonization.
Virulence gene regulation in Vibrio cholerae is under the control of the ToxR-ToxT regulatory cascade. Chemotaxis and net motility have been shown to influence the infectivity of Vibrio cholerae. V. cholerae toxR mutants do not synthesize proteins required for chemotaxis towards mucus. The inability of the toxR mutant strain to recognize and swim towards mucus is due to their failure to synthes...
متن کاملIn silico structural analysis of quorum sensing genes inVibrio fischeri
Quorum sensing controls the luminescence of Vibrio fischeri through the transcriptional activator LuxR and the specific autoinducer signal produced by luxI. Amino acid sequences of these two genes were analyzed using bioinformatics tools. LuxI consists of 193 amino acids and appears to contain five α-helices and six ß-sheets when analyzed by SSpro8. LuxI belongs to the autoinducer synthetase fa...
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ژورنال
عنوان ژورنال: FEMS Microbiology Letters
سال: 2004
ISSN: 0378-1097,1574-6968
DOI: 10.1016/j.femsle.2004.08.039