Molecular analysis of urease genes from a newly identified uncultured species of Helicobacter

61Citations
Citations of this article
9Readers
Mendeley users who have this article in their library.

This article is free to access.

Abstract

'Gastrospirillum hominis' is an uncultured gastric spiral bacterium that has recently been shown by 16S rDNA sequence analysis to be a newly recognized species of Helicobacter that infects humans, and it has been provisionally designated 'Helicobacter heilmannii.' We used PCR to directly amplify the urease structural genes of 'H. heilmannii' from infected gastric tissue. DNA sequence analysis identified two open reading frames, ureA and ureB, which code for polypeptides with predicted molecular weights of 25,729 and 61,831, respectively. The urease subunit genes from 'H. heilmannii' were cloned and expressed in Escherichia coli. Western blot (immunoblot) analysis showed that antiserum directed against the ureA and ureB gene products from H. pylori was cross-reactive with the corresponding polypeptides from 'H. heilmannii.' Analysis of the derived amino acid sequences of 'H. heilmannii' UreA and UreB demonstrated that 'H. heilmannii' urease is more highly related to the urease from H. felis (found in the stomachs of cats and dogs) than to the urease from H. pylori. These data are consistent with 16S rDNA sequence analysis and suggest that 'H. heilmannii' is phylogenetically most closely related to H. felis.

Cite

CITATION STYLE

APA

Solnick, J. V., O’Rourke, J., Lee, A., & Tompkins, L. S. (1994). Molecular analysis of urease genes from a newly identified uncultured species of Helicobacter. Infection and Immunity, 62(5), 1631–1638. https://doi.org/10.1128/iai.62.5.1631-1638.1994

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free