In:
Proceedings of the National Academy of Sciences, Proceedings of the National Academy of Sciences, Vol. 89, No. 13 ( 1992-07), p. 5976-5980
Abstract:
Penetration of intestinal epithelial cells is an important step in the pathogenesis of Salmonella infections. We have characterized a gene, invE, that is necessary for Salmonella invasion of cultured epithelial cells. The predicted amino acid sequence of InvE showed significant homology to the Yersinia outer membrane protein YopN (LcrE). Strains of Salmonella carrying mutations in invE were unable to penetrate Henle-407 human intestinal cells and Madin-Darby canine kidney cells, although they were fully capable of attaching to the same cells. Unlike wild-type Salmonella typhimurium, invE mutants failed to change the intracellular free calcium levels or the distribution of polymerized actin in cultured epithelial cells; neither did they alter the normal architecture of the microvilli of polarized Madin-Darby canine kidney cells. Wild-type S. typhimurium was able to rescue the invasive phenotype of the invE mutants in simultaneous infections of cultured epithelial cells although it did not rescue the Escherichia coli strain RDEC-1. We hypothesize that invE mutants are deficient in triggering the intracellular events that lead to bacterial internalization.
Type of Medium:
Online Resource
ISSN:
0027-8424
,
1091-6490
DOI:
10.1073/pnas.89.13.5976
Language:
English
Publisher:
Proceedings of the National Academy of Sciences
Publication Date:
1992
detail.hit.zdb_id:
209104-5
detail.hit.zdb_id:
1461794-8
SSG:
11
SSG:
12
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