CagB and CagC genes of helicobacter pylori and related compositions

Abstract

A cagB gene of H. pylori is provided. This nucleic acid can be the nucleic acid consisting of nucleotides 193 through 1158 in the sequence set forth as SEQ ID NO:1, which is an example of a native coding sequence for CagB. This nucleic acid can also be in a vector suitable for expressing a polypeptide encoded by the nucleic acid. A cagC gene of H. pylori is provided. This nucleic acid can be the isolated nucleic acid consisting of nucleotides 1170 through 3830 in the sequence set forth as SEQ ID NO:3, which is an example of a native coding sequence for CagC. This nucleic acid can also be in a vector suitable for expressing a polypeptide encoded by the nucleic acid. Isolated nucleic acids that specifically hybridize with cagB and cagC are provided. CagB and CagC are associated with peptic ulceration and other clinical syndromes in humans infected with strains of H. pylori that express it.

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