Genomic-sequence comparison of two unrelated isolates of the human gastric pathogen Helicobacter pylori - PubMed (original) (raw)
Comparative Study
. 1999 Jan 14;397(6715):176-80.
doi: 10.1038/16495.
L S Ling, D T Moir, B L King, E D Brown, P C Doig, D R Smith, B Noonan, B C Guild, B L deJonge, G Carmel, P J Tummino, A Caruso, M Uria-Nickelsen, D M Mills, C Ives, R Gibson, D Merberg, S D Mills, Q Jiang, D E Taylor, G F Vovis, T J Trust
Affiliations
- PMID: 9923682
- DOI: 10.1038/16495
Comparative Study
Genomic-sequence comparison of two unrelated isolates of the human gastric pathogen Helicobacter pylori
R A Alm et al. Nature. 1999.
Erratum in
- Nature 1999 Feb 25;397(6721):719
Abstract
Helicobacter pylori, one of the most common bacterial pathogens of humans, colonizes the gastric mucosa, where it appears to persist throughout the host's life unless the patient is treated. Colonization induces chronic gastric inflammation which can progress to a variety of diseases, ranging in severity from superficial gastritis and peptic ulcer to gastric cancer and mucosal-associated lymphoma. Strain-specific genetic diversity has been proposed to be involved in the organism's ability to cause different diseases or even be beneficial to the infected host and to participate in the lifelong chronicity of infection. Here we compare the complete genomic sequences of two unrelated H. pylori isolates. This is, to our knowledge, the first such genomic comparison. H. pylori was believed to exhibit a large degree of genomic and allelic diversity, but we find that the overall genomic organization, gene order and predicted proteomes (sets of proteins encoded by the genomes) of the two strains are quite similar. Between 6 to 7% of the genes are specific to each strain, with almost half of these genes being clustered in a single hypervariable region.
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