2WKC

Crystal structure from a single-stranded DNA binding protein from the lactococcal phage p2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.192 
  • R-Value Observed: 0.197 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structure and Function of Phage P2 Orf34(P2), a New Type of Single-Stranded DNA Binding Protein.

Scaltriti, E.Tegoni, M.Rivetti, C.Launay, H.Masson, J.Y.Magadan, A.H.Tremblay, D.Moineau, S.Ramoni, R.Lichiere, J.Campanacci, V.Cambillau, C.Ortiz-Lombardia, M.

(2009) Mol Microbiol 73: 1156

  • DOI: 10.1111/j.1365-2958.2009.06844.x
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Lactococcus lactis, a Gram-positive bacterium widely used by the dairy industry, is subject to infection by a diverse population of virulent phages, predominantly by those of the 936 group, including the siphovirus phage p2. Confronted with the negat ...

    Lactococcus lactis, a Gram-positive bacterium widely used by the dairy industry, is subject to infection by a diverse population of virulent phages, predominantly by those of the 936 group, including the siphovirus phage p2. Confronted with the negative impact of phage infection on milk fermentation, the study of the biology of lactococcal provides insight from applied and fundamental perspectives. We decided to characterize the product of the orf34 gene from lactococcus phage p2, which was considered as a candidate single-stranded DNA binding protein (SSB) due to its localization downstream of a gene coding for a single-strand annealing protein. Two-dimensional gel electrophoresis showed that ORF34(p2) is expressed in large amounts during the early phases of phage infection, suggesting an important role in this process. Gel-shift assays, surface plasmon resonance and atomic force microscopy demonstrated that ORF34(p2) interacts with single-strand DNA with nanomolar affinity. We also determined the crystal structure of ORF34(p2) and showed that it bears a variation of the typical oligonucleotide/oligosaccharide binding-fold of SSBs. Finally, we found that ORF34(p2) is able to stimulate Escherichia coli RecA-mediated homologous recombination. The specific structural and biochemical properties that distinguish ORF34(p2) from other SSB proteins are discussed.


    Organizational Affiliation

    Architecture et Fonction des Macromolécules Biologiques, UMR 6098 CNRS and Universités d'Aix-Marseille I and II, Campus de Luminy, Marseille Cedex 09, France.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ORF34P2
A, B, C, D
119LACTOCOCCUS PHAGE P2Mutation(s): 0 
Find proteins for Q09WL7 (Lactococcus virus jj50)
Go to UniProtKB:  Q09WL7
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.192 
  • R-Value Observed: 0.197 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 48.28α = 90
b = 71.71β = 90
c = 109.73γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
TRUNCATEdata scaling
MOLREPphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-09-15
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.2: 2019-05-29
    Changes: Data collection, Experimental preparation, Other