4npf

High-resolution structure of two tandem B domains of staphylococcal protein A connected by the conserved linker

spinqualitylabelsall models 4npf, resolution 1.49Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4npf is a 2 chain structure with sequence from Staphylococcus aureus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function SPA_STAAU Publication Abstract from PubMed The Staphylococcus aureus virulence factor staphylococcal protein A (SpA) is a major contributor to bacterial evasion of the host immune system, through high-affinity binding to host proteins such as antibodies. SpA includes five small three-helix-bundle domains (E-D-A-B-C) separated by conserved flexible linkers. Prior attempts to crystallize individual domains in the absence of a binding partner have apparently been unsuccessful. There have also been no previous structures of tandem domains. Here we report the high-resolution crystal structures of a single C domain, and of two B domains connected by the conserved linker. Both structures exhibit extensive multiscale conformational heterogeneity, which required novel modeling protocols. Comparison of domain structures shows that helix1 orientation is especially heterogeneous, coordinated with changes in side chain conformational networks and contacting protein interfaces. This represents the kind of structural plasticity that could enable SpA to bind multiple partners. Multiscale conformational heterogeneity in staphylococcal protein a: possible determinant of functional plasticity.,Deis LN, Pemble CW 4th, Qi Y, Hagarman A, Richardson DC, Richardson JS, Oas TG Structure. 2014 Oct 7;22(10):1467-77. doi: 10.1016/j.str.2014.08.014. PMID:25295398 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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