This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Reprints and Permissions Copyright Information Books from ASM Press MicrobeWorld Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Small, P L Articles by Falkow, S Search for Related Content PubMed PubMed Citation Articles by Small, P L Articles by Falkow, S

 Previous Article  |  Next Article 

Infect Immun. 1988 January; 56(1): 225-229

Identification of regions on a 230-kilobase plasmid from enteroinvasive Escherichia coli that are required for entry into HEp-2 cells.

Department of Medical Microbiology, Stanford University Medical School, California 94305.

ABSTRACT

Certain strains of Escherichia coli can cause an invasive diarrheal disease in humans which clinically resembles shigellosis. These strains share with Shigella species the ability to enter and replicate within colonic epithelial cells and the ability to bind Congo red dye in vitro when grown at 37 degrees C. Like shigellae, they contain a large plasmid essential for virulence. A 230-kilobase (kb) plasmid from enteroinvasive E. coli was genetically marked with a transposon and mobilized into an E. coli K-12 background. This plasmid conferred upon E. coli K-12 the ability to enter and multiply within cultured epithelial cells, as well as the ability to bind Congo red. Expression of these phenotypes required growth at 37 degrees C. Transposon mutagenesis was used to identify regions on the 230-kb plasmid required for virulence. All transposon insertions which resulted in loss of the ability to enter epithelial cells, as well as the ability to bind Congo red dye, were mapped to a single 25-kb BamHI fragment. Subclones from this 25-kb region were tested for the ability to complement invasion in noninvasive derivatives. A subclone containing about 8 kb of the left end of the 25-kb BamHI fragment was capable of complementing noninvasive mutants with Tn5 insertions in this region and restored to these noninvasive mutants the ability to enter epithelial cells.

This article has been cited by other articles:

• Torres, A. G., Zhou, X., Kaper, J. B. (2005). Adherence of Diarrheagenic Escherichia coli Strains to Epithelial Cells. Infect. Immun. 73: 18-29 [Full Text]  
• Boudeau, J., Glasser, A.-L., Masseret, E., Joly, B., Darfeuille-Michaud, A. (1999). Invasive Ability of an Escherichia coli Strain Isolated from the Ileal Mucosa of a Patient with Crohn's Disease. Infect. Immun. 67: 4499-4509 [Abstract] [Full Text]  
• Nataro, J. P., Kaper, J. B. (1998). Diarrheagenic Escherichia coli. Clin. Microbiol. Rev. 11: 142-201 [Abstract] [Full Text]