1W9R

Solution Structure of Choline Binding Protein A, Domain R2, the Major Adhesin of Streptococcus pneumoniae


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 19 
  • Selection Criteria: LEAST ENERGY 

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This is version 1.2 of the entry. See complete history


Literature

Solution Structure of Choline Binding Protein A, the Major Adhesin of Streptococcus Pneumoniae

Luo, R.Mann, B.Lewis, W.S.Rowe, A.Heath, R.Stewart, M.L.Hamburger, A.E.Sivakolundu, S.Lacy, E.R.Bjorkman, P.J.Tuomanen, E.Kriwacki, R.W.

(2005) EMBO J 24: 34

  • DOI: 10.1038/sj.emboj.7600490
  • Primary Citation of Related Structures:  
    1W9R

  • PubMed Abstract: 
  • Streptococcus pneumoniae (pneumococcus) remains a significant health threat worldwide, especially to the young and old. While some of the biomolecules involved in pneumococcal pathogenesis are known and understood in mechanistic terms, little is known about the molecular details of bacterium/host interactions ...

    Streptococcus pneumoniae (pneumococcus) remains a significant health threat worldwide, especially to the young and old. While some of the biomolecules involved in pneumococcal pathogenesis are known and understood in mechanistic terms, little is known about the molecular details of bacterium/host interactions. We report here the solution structure of the 'repeated' adhesion domains (domains R1 and R2) of the principal pneumococcal adhesin, choline binding protein A (CbpA). Further, we provide insights into the mechanism by which CbpA binds its human receptor, polymeric immunoglobulin receptor (pIgR). The R domains, comprised of 12 imperfect copies of the leucine zipper heptad motif, adopt a unique 3-alpha-helix, raft-like structure. Each pair of alpha-helices is antiparallel and conserved residues in the loop between Helices 1 and 2 exhibit a novel 'tyrosine fork' structure that is involved in binding pIgR. This and other structural features that we show are conserved in most pneumococcal strains appear to generally play an important role in bacterial adhesion to pIgR. Interestingly, pneumococcus is the only bacterium known to adhere to and invade human cells by binding to pIgR.


    Organizational Affiliation

    Department of Structural Biology, St Jude Children's Research Hospital, Memphis, TN 38105, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
CHOLINE BINDING PROTEIN AA119Streptococcus pneumoniae TIGR4Mutation(s): 0 
Gene Names: cbpASP_2190
UniProt
Find proteins for A0A0H2US50 (Streptococcus pneumoniae serotype 4 (strain ATCC BAA-334 / TIGR4))
Explore A0A0H2US50 
Go to UniProtKB:  A0A0H2US50
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 19 
  • Selection Criteria: LEAST ENERGY 
  • OLDERADO: 1W9R Olderado

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-02-22
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance