3PHS

Crystal Structure of GBS52, the minor pilin in gram-positive pathogen Streptococcus agalactiae


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.199 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

An IgG-like domain in the minor pilin GBS52 of Streptococcus agalactiae mediates lung epithelial cell adhesion.

Krishnan, V.Gaspar, A.H.Ye, N.Mandlik, A.Ton-That, H.Narayana, S.V.

(2007) Structure 15: 893-903

  • DOI: 10.1016/j.str.2007.06.015
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Streptococcus agalactiae is the leading cause of neonatal pneumonia, sepsis, and meningitis. The pathogen assembles heterotrimeric pilus structures on its surface; however, their function in pathogenesis is poorly understood. We report here the cryst ...

    Streptococcus agalactiae is the leading cause of neonatal pneumonia, sepsis, and meningitis. The pathogen assembles heterotrimeric pilus structures on its surface; however, their function in pathogenesis is poorly understood. We report here the crystal structure of the pilin GBS52, which reveals two IgG-like fold domains, N1 and N2. Each domain is comprised of seven antiparallel beta strands, an arrangement similar to the fold observed in the Staphylococcus aureus adhesin Cna. Consistent with its role as an adhesin, deletion of gbs52 gene significantly reduces bacterial adherence to pulmonary epithelial cells. Moreover, latex beads linked to the GBS52 protein adhere to pulmonary but not to many other epithelial cells; binding to the former is specifically inhibited by antibodies against GBS52. Nonetheless, substantial binding is only observed with N2 domain-conjugated beads. This study presents the structure of a Gram-positive pilin that utilizes a distinct IgG fold variant to mediate pathogen adherence to a specific tissue.


    Organizational Affiliation

    School of Optometry and Center for Biophysical Sciences and Engineering, University of Alabama at Birmingham, AL 35294, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Cell wall surface anchor family protein
A
249Streptococcus agalactiae serotype V (strain ATCC BAA-611 / 2603 V/R)Mutation(s): 0 
Find proteins for Q8E0S8 (Streptococcus agalactiae serotype V (strain ATCC BAA-611 / 2603 V/R))
Go to UniProtKB:  Q8E0S8
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.199 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 41.481α = 90.00
b = 52.222β = 101.79
c = 61.006γ = 90.00
Software Package:
Software NamePurpose
d*TREKdata reduction
d*TREKdata scaling
SOLVEphasing
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-11-17
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance