نتایج جستجو برای: vibrio fischeri

تعداد نتایج: 15592  

Journal: :molecular biology research communications 2015
mohammed z al-khayyat

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...

Journal: :Evolution; international journal of organic evolution 2012
W Soto E B Punke M K Nishiguchi

The symbiosis between marine bioluminescent Vibrio bacteria and the sepiolid squid Euprymna is a model for studying animal-bacterial Interactions. Vibrio symbionts native to particular Euprymna species are competitively dominant, capable of outcompeting foreign Vibrio strains from other Euprymna host species. Despite competitive dominance, secondary colonization events by invading nonnative Vib...

Journal: :Journal of bacteriology 1994
K A Reich G K Schoolnik

A cross-hybridizing DNA fragment to Vibrio cholerae toxR was cloned from the nonpathogenic light organ symbiont Vibrio fischeri, and three proteins homologous to V. cholerae ToxR, ToxS, and HtpG were deduced from its DNA sequence. V. fischeri ToxR was found to activate a V. cholerae ToxR-regulated promoter, and an antiserum raised against the amino-terminal domain of V. cholerae ToxR cross-reac...

Journal: :Applied and environmental microbiology 2008
Dawn M Adin Nancy J Phillips Bradford W Gibson Michael A Apicella Edward G Ruby Margaret J McFall-Ngai Daniel B Hall Eric V Stabb

Bacterial lipid A is an important mediator of bacterium-host interactions, and secondary acylations added by HtrB and MsbB can be critical for colonization and virulence in pathogenic infections. In contrast, Vibrio fischeri lipid A stimulates normal developmental processes in this bacterium's mutualistic host, Euprymna scolopes, although the importance of lipid A structure in this symbiosis is...

2003
Deborah S. Millikan Edward G. Ruby

Flagellum-mediated motility of Vibrio fischeri is an essential factor in the bacterium’s ability to colonize its host, the Hawaiian squid Euprymna scolopes. To begin characterizing the nature of the flagellar regulon, we have cloned a gene, designated flrA, from V. fischeri that encodes a putative -dependent transcriptional activator. Genetic arrangement of the flrA locus in V. fischeri is simi...

Journal: :Canadian journal of microbiology 2012
Cindy R Deloney-Marino Karen L Visick

Upon hatching, the Hawaiian squid Euprymna scolopes is rapidly colonized by its symbiotic partner, the bioluminescent marine bacterium Vibrio fischeri . Vibrio fischeri cells present in the seawater enter the light organ of juvenile squid in a process that requires bacterial motility. In this study, we investigated the role chemotaxis may play in establishing this symbiotic colonization. Pre...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2005
E G Ruby M Urbanowski J Campbell A Dunn M Faini R Gunsalus P Lostroh C Lupp J McCann D Millikan A Schaefer E Stabb A Stevens K Visick C Whistler E P Greenberg

Vibrio fischeri belongs to the Vibrionaceae, a large family of marine gamma-proteobacteria that includes several dozen species known to engage in a diversity of beneficial or pathogenic interactions with animal tissue. Among the small number of pathogenic Vibrio species that cause human diseases are Vibrio cholerae, Vibrio parahaemolyticus, and Vibrio vulnificus, the only members of the Vibrion...

Journal: :Molecular microbiology 2003
Carol M Miyamoto Paul V Dunlap Edward G Ruby Edward A Meighen

Quorum-sensing control of luminescence in Vibrio harveyi, which involves an indirect autoinducer-mediated phosphorelay signal transduction system, contrasts with the prototypical quorum-sensing system of Vibrio fischeri, in which the autoinducer and the transcriptional activator LuxR directly activate lux operon expression. In V. harveyi, a regulator not homologous to V. fischeri LuxR and also ...

2015
Nur Izzati Mohamad Wai-Fong Yin Kok-Gan Chan

Vibrio tubiashii strain T33 was isolated from the coastal waters of Morib, Malaysia, and was shown to possess quorum-sensing activity similar to that of its famous relative Vibrio fischeri. Here, the assembly and annotation of its genome are presented.

Journal: :Environmental microbiology 2010
Amber Pollack-Berti Michael S Wollenberg Edward G Ruby

Recent evidence has indicated that natural genetic transformation occurs in Vibrio cholerae, and that it requires both induction by chitin oligosaccharides, like chitohexaose, and expression of a putative regulatory gene designated tfoX. Using sequence and phylogenetic analyses we have found two tfoX paralogues in all sequenced genomes of the genus Vibrio. Like V. cholerae, when grown in chitoh...

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