2vs0

Structural analysis of homodimeric staphylococcal aureus virulence factor EsxA

spinqualitylabelsall models 2vs0, resolution 1.40Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2vs0 is a 2 chain structure with sequence from "micrococcus_aureus"_(rosenbach_1884)_zopf_1885 "micrococcus aureus" (rosenbach 1884) zopf 1885. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: CAC, ZN NonStd Res: MSE Related: 2vrz Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [ESXA_STAAM] Virulence factor that is important for the establishment of infection in the host (By similarity). Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed Staphylococcus aureus pathogenesis depends on a specialized protein secretion system (ESX-1) that delivers a range of virulence factors to assist infectivity. We report the characterization of two such factors, EsxA and EsxB, small acidic dimeric proteins carrying a distinctive WXG motif. EsxA crystallized in triclinic and monoclinic forms and high-resolution structures were determined. The asymmetric unit of each crystal form is a dimer. The EsxA subunit forms an elongated cylindrical structure created from side-by-side alpha-helices linked with a hairpin bend formed by the WXG motif. Approximately 25% of the solvent accessible surface area of each subunit is involved in interactions, predominantly hydrophobic, with the partner subunit. Secondary-structure predictions suggest that EsxB displays a similar structure. The WXG motif helps to create a shallow cleft at each end of the dimer, forming a short beta-sheet-like feature with an N-terminal segment of the partner subunit. Structural and sequence comparisons, exploiting biological data on related proteins found in Mycobacterium tuberculosis, suggest that this family of proteins may contribute to pathogenesis by transporting protein cargo through the ESX-1 system exploiting a C-terminal secretion signal and/or are capable of acting as adaptor proteins to facilitate interactions with host receptor proteins. Structure of Staphylococcus aureus EsxA suggests a contribution to virulence by action as a transport chaperone and/or adaptor protein.,Sundaramoorthy R, Fyfe PK, Hunter WN J Mol Biol. 2008 Nov 14;383(3):603-14. Epub 2008 Aug 27. PMID:18773907 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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