4q98

Crystal structure of a fimbrilin (fimA) from Porphyromonas gingivalis W83 at 1.30 A resolution (PSI Community Target, Nakayama)

spinqualitylabelsall models 4q98, resolution 1.30Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4q98 is a 1 chain structure with sequence from Porphyromonas gingivalis W83. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.3Å Ligands: MSE, NA Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function FIMA_PORGI Fimbrillin is the structural subunit of the fimbriae, that are filamentous appendages on the cell surface. Fimbriae of P.gingivalis are recognized as a major virulence factor as they mediate cell adhesion and play an important role in invasion of periodontal tissues (By similarity). Publication Abstract from PubMed Pili are proteinaceous polymers of linked pilins that protrude from the cell surface of many bacteria and often mediate adherence and virulence. We investigated a set of 20 Bacteroidia pilins from the human microbiome whose structures and mechanism of assembly were unknown. Crystal structures and biochemical data revealed a diverse protein superfamily with a common Greek-key beta sandwich fold with two transthyretin-like repeats that polymerize into a pilus through a strand-exchange mechanism. The assembly mechanism of the central, structural pilins involves proteinase-assisted removal of their N-terminal beta strand, creating an extended hydrophobic groove that binds the C-terminal donor strands of the incoming pilin. Accessory pilins at the tip and base have unique structural features specific to their location, allowing initiation or termination of the assembly. The Bacteroidia pilus, therefore, has a biogenesis mechanism that is distinct from other known pili and likely represents a different type of bacterial pilus. A Distinct Type of Pilus from the Human Microbiome.,Xu Q, Shoji M, Shibata S, Naito M, Sato K, Elsliger MA, Grant JC, Axelrod HL, Chiu HJ, Farr CL, Jaroszewski L, Knuth MW, Deacon AM, Godzik A, Lesley SA, Curtis MA, Nakayama K, Wilson IA Cell. 2016 Apr 21;165(3):690-703. doi: 10.1016/j.cell.2016.03.016. Epub 2016 Apr , 7. PMID:27062925 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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