3UQZ

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.219 

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.USA 109: E2466-E2475

  • DOI: 10.1073/pnas.1205638109

  • 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 transformin ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
DNA processing protein DprA
A, B, C
288Streptococcus pneumoniae serotype 4 (strain ATCC BAA-334 / TIGR4)N/A
Find proteins for A0A0H2UQA6 (Streptococcus pneumoniae serotype 4 (strain ATCC BAA-334 / TIGR4))
Go to UniProtKB:  A0A0H2UQA6
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, B, C
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
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: 2.7 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.219 
  • Space Group: I 41 2 2
Unit Cell:
Length (Å)Angle (°)
a = 300.240α = 90.00
b = 300.240β = 90.00
c = 78.340γ = 90.00
Software Package:
Software NamePurpose
ADSCdata collection
XDSdata reduction
XSCALEdata scaling
BUSTERrefinement
SHELXSphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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