Journal Article

<i>Helicobacter pylori</i> strain ATCC700392 encodes a methyl-accepting chemotaxis receptor protein (MCP) for arginine and sodium bicarbonate

Oscar Cerda, Ana Rivas and Héctor Toledo

in FEMS Microbiology Letters

Volume 224, issue 2, pages 175-181
Published in print July 2003 |
Published online January 2006 | e-ISSN: 1574-6968 | DOI:

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Helicobacter pylori ATCC43504 responds chemotactically to aspartic acid and serine, but not to arginine, nor to sodium bicarbonate. In contrast, H. pylori ATCC700392 (strain 26695) shows chemotaxis to all four attractants. Open reading frame HP0099 from H. pylori 26695 is predicted to encode one of three methyl-accepting chemotaxis receptor proteins (MCPs). When Escherichia coli is transformed with a plasmid carrying HP0099 from strain 26695, the recombinants acquire chemotaxis to arginine, bicarbonate, and urea. In H. pylori 43504, the HP0099 gene is interrupted with a mini-IS605 insertion, which accounts for its inability to recognize arginine and bicarbonate as attractants. Together, these results argue that the H. pylori HP0099 gene encodes an MCP for arginine and bicarbonate.

Keywords: Chemotaxis; Signal transduction; HP0099; IS605; Helicobacter pylori

Journal Article.  3840 words.  Illustrated.

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