6jzj

Structure of FimA type-2 (FimA2) prepilin of the type V major fimbrium

spinqualitylabelsall models 6jzj, resolution 1.60Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 6jzj is a 1 chain structure with sequence from Porphyromonas gingivalis TDC60. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.6Å Ligands: SO4 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function Q4W6Y8_PORGN Publication Abstract from PubMed Bacterial adhesion is a general strategy for host-microbe and microbe-microbe interactions. Adhesive pili are essential for colonization, biofilm formation, virulence and pathogenesis of many environmental and pathogenic bacteria(1,2). Members of the class Bacteroidia have unique type V pili, assembled by protease-mediated polymerization(3). Porphyromonas gingivalis is the main contributor to periodontal disease and its type V pili are a key factor for its virulence(4). However, the structure of the polymerized pilus and its assembly mechanism are unknown. Here we show structures of polymerized and monomeric states of FimA stalk pilin from P. gingivalis, determined by cryo-electron microscopy and crystallography. The atomic model of assembled FimA shows that the C-terminal strand of a donor subunit is inserted into a groove in the beta-sheet of an acceptor subunit after N-terminal cleavage by the protease RgpB. The C terminus of the donor strand is essential for polymerization. We propose that type V pili assemble via a sequential polar assembly mechanism at the cell surface, involving protease-mediated strand exchange, employed by various Gram-negative species belonging to the class Bacteroidia. Our results reveal functional surfaces related to pathogenic properties of polymerized FimA. These insights may facilitate development of antibacterial drugs. Structure of polymerized type V pilin reveals assembly mechanism involving protease-mediated strand exchange.,Shibata S, Shoji M, Okada K, Matsunami H, Matthews MM, Imada K, Nakayama K, Wolf M Nat Microbiol. 2020 Apr 13. pii: 10.1038/s41564-020-0705-1. doi:, 10.1038/s41564-020-0705-1. PMID:32284566 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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