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https://hdl.handle.net/2440/28177
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Type: | Journal article |
Title: | Reactivity of convalescent-phase hemolytic-uremic syndrome patient sera with the megaplasmid-encoded TagA protein of Shiga toxigenic Escherichia coli O157 |
Author: | Paton, A. Paton, J. |
Citation: | Journal of Clinical Microbiology, 2002; 40(4):1395-1399 |
Publisher: | Amer Soc Microbiology |
Issue Date: | 2002 |
ISSN: | 0095-1137 1098-660X |
Statement of Responsibility: | Adrienne W. Paton and James C. Paton |
Abstract: | A cosmid library of Shiga toxigenic Escherichia coli (STEC) O157:H7 strain EDL933 DNA was screened for clones capable of reacting with convalescent-phase serum from a patient with hemolytic-uremic syndrome (HUS), in an attempt to identify candidate virulence genes. One of the immunoreactive clones contained a portion of the large plasmid pO157, and the immunoreactive gene product was identified as TagA. The function of this 898-amino-acid protein is unknown, but it exhibits 42% amino acid sequence identity and 63% similarity to a 312-amino-acid region of a ToxR-regulated lipoprotein of Vibrio cholerae. Antibodies to E. coli O157 TagA were detected in sera from other HUS patients with O157 STEC infection but not in those from patients whose illnesses were caused by other STEC types or in healthy controls. These data demonstrate that TagA is expressed in vivo and provide circumstantial evidence for a role in the pathogenesis of the disease. The tagA gene is present only in STEC strains belonging to serogroup O157, and so antibodies to TagA are a potentially useful serological marker for infections due to such strains. |
Keywords: | Humans Escherichia coli O157 Escherichia coli Infections Hemolytic-Uremic Syndrome Convalescence Lipoproteins Bacterial Proteins Shiga Toxin Immune Sera Antibodies, Bacterial Virulence Cosmids Plasmids |
Description: | Copyright © 2002, American Society for Microbiology. All Rights Reserved |
DOI: | 10.1128/JCM.40.4.1395-1399.2002 |
Published version: | http://jcm.asm.org/cgi/content/abstract/40/4/1395 |
Appears in Collections: | Aurora harvest 6 Molecular and Biomedical Science publications |
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