2pil

Crystallographic Structure of Phosphorylated Pilin from Neisseria: Phosphoserine Sites Modify Type IV Pilus Surface Chemistry

spinqualitylabelsall models 2pil, resolution 2.60Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2pil is a 1 chain structure with sequence from Neisseria gonorrhoeae. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: HTO, PT, GLA, NAG NonStd Res: MEA, SEP Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [FMM1_NEIGO] This protein is the predominant Neisseria surface antigen, which allows adhesion of the bacterium to various host cells. 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 Understanding the structural biology of type IV pili, fibres responsible for the virulent attachment and motility of numerous bacterial pathogens, requires a detailed understanding of the three-dimensional structure and chemistry of the constituent pilin subunit. X-ray crystallographic refinement of Neisseria gonorrhoeae pilin against diffraction data to 2.6 A resolution, coupled with mass spectrometry of peptide fragments, reveals phosphoserine at residue 68. Phosphoserine is exposed on the surface of the modelled type IV pilus at the interface of neighbouring pilin molecules. The site-specific mutation of serine 68 to alanine showed that the loss of the phosphorylation alters the morphology of fibres examined by electron microscopy without a notable effect on adhesion, transformation, piliation or twitching motility. The structural and chemical characterization of protein phosphoserine in type IV pilin subunits is an important indication that this modification, key to numerous regulatory aspects of eukaryotic cell biology, exists in the virulence factor proteins of bacterial pathogens. These O-linked phosphate modifications, unusual in prokaryotes, thus merit study for possible roles in pilus biogenesis and modulation of pilin chemistry for optimal in vivo function. Crystallographic structure reveals phosphorylated pilin from Neisseria: phosphoserine sites modify type IV pilus surface chemistry and fibre morphology.,Forest KT, Dunham SA, Koomey M, Tainer JA Mol Microbiol. 1999 Feb;31(3):743-52. PMID:10048019 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Pilin 3D structures

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