| Crystal structure of enterotoxigenic Escherichia coli colonization factor CS6 reveals a novel type of functional assembly. | |
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MedLine Citation:
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PMID: 23046340 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Coli surface antigen 6 (CS6) is a widely expressed enterotoxigenic Escherichia coli (ETEC) colonization factor that mediates bacterial attachment to the small intestinal epithelium. CS6 is a polymer of two protein subunits CssA and CssB, which are secreted and assembled on the cell surface via the CssC/CssD chaperone usher (CU) pathway. Here, we present an atomic resolution model for the structure of CS6 based on the results of X-ray crystallographic, spectroscopic and biochemical studies, and suggest a mechanism for CS6-mediated adhesion. We show that the CssA and CssB subunits are assembled alternately in linear fibres by the principle of donor strand complementation. This type of fibre assembly is novel for CU assembled adhesins. We also show that both subunits in the fibre bind to receptors on epithelial cells, and that CssB, but not CssA, specifically recognizes the extracellular matrix protein fibronectin. Taken together, structural and functional results suggest that CS6 is an adhesive organelle of a novel type, a hetero-polyadhesin that is capable of polyvalent attachment to different receptors. |
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Authors:
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Saumendra P Roy; Mohammad M Rahman; Xiao Di Yu; Minna Tuittila; Stefan D Knight; Anton V Zavialov |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-10-10 |
Journal Detail:
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Title: Molecular microbiology Volume: - ISSN: 1365-2958 ISO Abbreviation: Mol. Microbiol. Publication Date: 2012 Oct |
Date Detail:
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Created Date: 2012-10-10 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8712028 Medline TA: Mol Microbiol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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© 2012 Blackwell Publishing Ltd. |
Affiliation:
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Department of Molecular Biology, Uppsala BioCenter, Swedish University of Agricultural Sciences, BMC, Box 590, SE-753 24, Uppsala, Sweden; Department of Chemistry, University of Turku, Turku, JBL, BioCity 6A, FIN-20520, Turku, Finland. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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