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          Institute: MPI für Entwicklungsbiologie     Collection: Abteilung 1 - Protein Evolution (A. Lupas)     Display Documents

ID: 591408.0, MPI für Entwicklungsbiologie / Abteilung 1 - Protein Evolution (A. Lupas)
The structure of E. coli IgG-binding protein D suggests a general model for bending and binding in trimeric autotransporter adhesins
Authors:Leo, J. C.; Lyskowski, A.; Hattula, K.; Hartmann, M. D.; Schwarz, H.; Butcher, S. J.; Linke, D.; Lupas, A. N.; Goldman, A.
Date of Publication (YYYY-MM-DD):2011-07-13
Title of Journal:Structure
Issue / Number:7
Start Page:1021
End Page:1030
Review Status:not specified
Audience:Not Specified
Abstract / Description:The Escherichia coli Ig-binding (Eib) proteins are trimeric autotransporter adhesins (TAAs) and receptors for IgG Fc. We present the structure of a large fragment of the passenger domain of EibD, the first TAA structure to have both a YadA-like head domain and the entire coiled-coil stalk. The stalk begins as a right-handed superhelix, but switches handedness halfway down. An unexpected beta-minidomain joins the two and inserts a approximately 120 degrees rotation such that there is no net twist between the beginning and end of the stalk. This may be important in folding and autotransport. The surprisingly large cavities we found in EibD and other TAAs may explain how TAAs bend to bind their ligands. We identified how IgA and IgG bind and modeled the EibD-IgG Fc complex. We further show that EibD promotes autoagglutination and biofilm formation and forms a fibrillar layer covering the cell surface making zipper-like contacts between cells.
Free Keywords:Adhesins, Bacterial/*chemistry/immunology/metabolism; Agglutination; Amino Acid Sequence; Bacterial Adhesion; Binding Sites; Carrier Proteins/*chemistry/immunology/metabolism; Cloning, Molecular; Crystallization; Crystallography, X-Ray; Escherichia coli/*chemistry/immunology/metabolism; Escherichia coli Proteins/*chemistry/immunology/metabolism; Immunoglobulin Fc Fragments/*chemistry/immunology/metabolism; Immunoglobulin G/*chemistry/immunology/metabolism; Models, Molecular; Molecular Sequence Data; Plasmids; Protein Binding; Protein Structure, Tertiary; Recombinant Fusion Proteins/*chemistry/genetics/metabolism; Transfection
External Publication Status:published
Document Type:Article
Affiliations:MPI für Entwicklungsbiologie/Abteilung 1 - Proteinevolution (Andrei Lupas)
External Affiliations:%G eng
Identifiers:ISSN:1878-4186 (Electronic) 0969-2126 (Linking) %R S096... [ID No:1]
URL:http://www.ncbi.nlm.nih.gov/pubmed/21742268 [ID No:2]
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