3UQZ

X-ray structure of DNA processing protein A (DprA) from Streptococcus pneumoniae


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.219 
  • R-Value Observed: 0.221 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structure-function analysis of pneumococcal DprA protein reveals that dimerization is crucial for loading RecA recombinase onto DNA during transformation.

Quevillon-Cheruel, S.Campo, N.Mirouze, N.Mortier-Barriere, I.Brooks, M.A.Boudes, M.Durand, D.Soulet, A.L.Lisboa, J.Noirot, P.Martin, B.van Tilbeurgh, H.Noirot-Gros, M.F.Claverys, J.P.Polard, P.

(2012) Proc Natl Acad Sci U S A 109: E2466-E2475

  • DOI: 10.1073/pnas.1205638109
  • Primary Citation of Related Structures:  
    3UQZ

  • PubMed Abstract: 
  • Transformation promotes genome plasticity in bacteria via RecA-driven homologous recombination. In the gram-positive human pathogen Streptococcus pneumoniae, the transformasome a multiprotein complex, internalizes, protects, and processes transforming DNA to generate chromosomal recombinants ...

    Transformation promotes genome plasticity in bacteria via RecA-driven homologous recombination. In the gram-positive human pathogen Streptococcus pneumoniae, the transformasome a multiprotein complex, internalizes, protects, and processes transforming DNA to generate chromosomal recombinants. Double-stranded DNA is internalized as single strands, onto which the transformation-dedicated DNA processing protein A (DprA) ensures the loading of RecA to form presynaptic filaments. We report that the structure of DprA consists of the association of a sterile alpha motif domain and a Rossmann fold and that DprA forms tail-to-tail dimers. The isolation of DprA self-interaction mutants revealed that dimerization is crucial for the formation of nucleocomplexes in vitro and for genetic transformation. Residues important for DprA-RecA interaction also were identified and mutated, establishing this interaction as equally important for transformation. Positioning of key interaction residues on the DprA structure revealed an overlap of DprA-DprA and DprA-RecA interaction surfaces. We propose a model in which RecA interaction promotes rearrangement or disruption of the DprA dimer, enabling the subsequent nucleation of RecA and its polymerization onto ssDNA.


    Organizational Affiliation

    Institut de Biochimie et de Biophysique Moléculaire et Cellulaire, Université de Paris-Sud, Centre National de la Recherche Scientifique, Unité Mixte de Recherche 8619, Bât 430, 91405 Orsay Cedex, France. sophie.quevillon-cheruel@u-psud.fr



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
DNA processing protein DprAA, B, C288Streptococcus pneumoniaeMutation(s): 0 
Gene Names: SP_1266
UniProt
Find proteins for A0A0H2UQA6 (Streptococcus pneumoniae serotype 4 (strain ATCC BAA-334 / TIGR4))
Explore A0A0H2UQA6 
Go to UniProtKB:  A0A0H2UQA6
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A0H2UQA6
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, B, C L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.219 
  • R-Value Observed: 0.221 
  • Space Group: I 41 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 300.24α = 90
b = 300.24β = 90
c = 78.34γ = 90
Software Package:
Software NamePurpose
ADSCdata collection
SHELXSphasing
BUSTERrefinement
XDSdata reduction
XSCALEdata scaling

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-08-29
    Type: Initial release
  • Version 1.1: 2012-09-26
    Changes: Database references