Literature DB >> 7479882

Cytoplasmic free-Ca2+ level rises with repellents and falls with attractants in Escherichia coli chemotaxis.

L S Tisa1, J Adler.   

Abstract

Cytoplasmic free-Ca2+ levels in Escherichia coli were measured by use of the fluorescent Ca(2+)-indicator dye fura-2. Chemotactically wild-type E. coli regulated cytoplasmic free Ca2+ at approximately 100 nM when no stimuli were encountered, but changes in bacterial behavior correlated with changes in cytoplasmic free-Ca2+ concentration. For chemotactically wild-type E. coli, addition of a repellent resulted in cells tumbling and a transient increase in cytoplasmic free-Ca2+ levels. Conversely, addition of an attractant to wild-type cells caused running and produced a transient decrease in cytoplasmic free-Ca2+ levels. Studies with mutant strains showed that the chemoreceptors were required for the observed changes in cytoplasmic free-Ca2+ levels in response to chemical stimuli.

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Year:  1995        PMID： 7479882      PMCID： PMC40695          DOI： 10.1073/pnas.92.23.10777

Source DB:  PubMed          Journal:  Proc Natl Acad Sci U S A        ISSN： 0027-8424            Impact factor:   11.205


  28 in total

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Journal:  J Bacteriol       Date:  1972-10       Impact factor: 3.490
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  20 in total

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7.  Effect of bile on Vibrio parahaemolyticus.

Authors:  J L Pace; T J Chai; H A Rossi; X Jiang
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8.  Calcium is required for swimming by the nonflagellated cyanobacterium Synechococcus strain WH8113.

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9.  Crystallization and preliminary X-ray diffraction studies of the calcium-binding protein CalD from Streptomyces coelicolor.

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10.  CabC, an EF-hand calcium-binding protein, is involved in Ca2+-mediated regulation of spore germination and aerial hypha formation in Streptomyces coelicolor.

Authors:  Sheng-Lan Wang; Ke-Qiang Fan; Xu Yang; Zeng-Xi Lin; Xin-Ping Xu; Ke-Qian Yang
Journal:  J Bacteriol       Date:  2008-03-28       Impact factor: 3.490
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