1K24

Crystal Structure of the OpcA Outer Membrane Adhesin/Invasin from Neisseria meningitidis


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.03 Å
  • R-Value Free: 0.274 
  • R-Value Work: 0.235 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of the OpcA integral membrane adhesin from Neisseria meningitidis.

Prince, S.M.Achtman, M.Derrick, J.P.

(2002) Proc.Natl.Acad.Sci.USA 99: 3417-3421

  • DOI: 10.1073/pnas.062630899
  • Also Cited By: 2VDF

  • PubMed Abstract: 
  • OpcA is an integral outer membrane protein from Neisseria meningitidis, the causative agent of meningococcal meningitis and septicemia. It mediates the adhesion of N. meningitidis to epithelial and endothelial cells by binding to vitronectin and prot ...

    OpcA is an integral outer membrane protein from Neisseria meningitidis, the causative agent of meningococcal meningitis and septicemia. It mediates the adhesion of N. meningitidis to epithelial and endothelial cells by binding to vitronectin and proteoglycan cell-surface receptors. Here, we report the determination of the crystal structure of OpcA to 2.0 A resolution. OpcA adopts a 10-stranded beta-barrel structure with extensive loop regions that protrude above the predicted surface of the membrane. The second external loop adopts an unusual conformation, traversing the axis of the beta-barrel and apparently blocking formation of a pore through the membrane. Loops 2, 3, 4, and 5 associate to form one side of a crevice in the external surface of the structure, the other side being formed by loop 1. The crevice is lined by positively charged residues and would form an ideal binding site for proteoglycan polysaccharide. The structure, therefore, suggests a model for how adhesion of this important human pathogen to proteoglycan is mediated at the molecular level.


    Related Citations: 
    • Projection Structure of Reconstituted Opc Outer Membrane Protein from Neisseria meningitidis
      Collins, R.,Achtman, M.,Ford, R.,Bullough, P.,Derrick, J.
      (1999) MOL.MICROBIOL. 32: 217
    • Purification and Characterization of Eight Class 5 outer Membrane Protein Variants from a Clone of Neisseria meningitidis Serogroup A
      Achtman, M.,Neilbert, M.,Crowe, B.A.,Strittmatter, W.,Kusecek, B.,Weyse, E.,Walsh, M.J.,Slawig, B.,Morelli, G.,Moll, A.,Blake, M.
      (1988) J.EXP.MED. 168: 507
    • Two-dimensional Structure of the Opc Invasin from Neisseria meningitidis
      Merker, P.,Tommassen, J.,Kusacek, B.,Virji, M.,Sesardic, D.,Achtman, M.
      (1997) MOL.MICROBIOL. 23: 281
    • Expression, Refolding and Crystallization of the OpcA Invasin from Neisseria meningitidis
      Prince, S.M.,Feron, C.,Janssens, D.,Lobet, Y.,Achtman, M.,Kusecek, B.,Bullough, P.A.,Derrick, J.P.
      (2001) Acta Crystallogr.,Sect.D 57: 1164


    Organizational Affiliation

    Department of Biomolecular Sciences, University of Manchester Institute of Science and Technology, Sackville Street, Manchester M60 1QD, United Kingdom.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
outer membrane protein
A
253Neisseria meningitidisGene Names: opc (opcA)
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: BETA-BARREL
Sub Group: 
Beta-Barrel Membrane Proteins: Monomeric/Dimeric
Protein: 
OpcA adhesin protein
Find proteins for Q51227 (Neisseria meningitidis)
Go to UniProtKB:  Q51227
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
1PE
Query on 1PE

Download SDF File 
Download CCD File 
A
PENTAETHYLENE GLYCOL
PEG400
C10 H22 O6
JLFNLZLINWHATN-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.03 Å
  • R-Value Free: 0.274 
  • R-Value Work: 0.235 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 96.859α = 90.00
b = 46.346β = 90.00
c = 73.977γ = 90.00
Software Package:
Software NamePurpose
MOSFLMdata reduction
REFMACrefinement
CCP4data scaling
SHARPphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-03-27
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance