3D8L

Crystal structure of ORF12 from the lactococcus lactis bacteriophage p2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.203 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of ORF12 from Lactococcus lactis phage p2 identifies a tape measure protein chaperone

Siponen, M.Sciara, G.Villion, M.Spinelli, S.Cambillau, C.Moineau, S.Campanacci, V.

(2009) J.Bacteriol. 191: 728-734

  • DOI: 10.1128/JB.01363-08

  • PubMed Abstract: 
  • We report here the characterization of the nonstructural protein ORF12 of the virulent lactococcal phage p2, which belongs to the Siphoviridae family. ORF12 was produced as a soluble protein, which forms large oligomers (6- to 15-mers) in solution. U ...

    We report here the characterization of the nonstructural protein ORF12 of the virulent lactococcal phage p2, which belongs to the Siphoviridae family. ORF12 was produced as a soluble protein, which forms large oligomers (6- to 15-mers) in solution. Using anti-ORF12 antibodies, we have confirmed that ORF12 is not found in the virion structure but is detected in the second half of the lytic cycle, indicating that it is a late-expressed protein. The structure of ORF12, solved by single anomalous diffraction and refined at 2.9-A resolution, revealed a previously unknown fold as well as the presence of a hydrophobic patch at its surface. Furthermore, crystal packing of ORF12 formed long spirals in which a hydrophobic, continuous crevice was identified. This crevice exhibited a repeated motif of aromatic residues, which coincided with the same repeated motif usually found in tape measure protein (TMP), predicted to form helices. A model of a complex between ORF12 and a repeated motif of the TMP of phage p2 (ORF14) was generated, in which the TMP helix fitted exquisitely in the crevice and the aromatic patches of ORF12. We suggest, therefore, that ORF12 might act as a chaperone for TMP hydrophobic repeats, maintaining TMP in solution during the tail assembly of the lactococcal siphophage p2.


    Organizational Affiliation

    Architecture et Fonction des Macromolécules Biologiques, UMR 6098 CNRS and Universités d'Aix-Marseille I & II, Campus de Luminy, case 932, 13288 Marseille cedex 09, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ORF12
A, B, C
91Lactococcus phage p2Mutation(s): 1 
Find proteins for D3WAD0 (Lactococcus phage p2)
Go to UniProtKB:  D3WAD0
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.203 
  • Space Group: H 3 2
Unit Cell:
Length (Å)Angle (°)
a = 158.318α = 90.00
b = 158.318β = 90.00
c = 99.524γ = 120.00
Software Package:
Software NamePurpose
SCALAdata scaling
ADSCdata collection
MOSFLMdata reduction
REFMACrefinement
SOLVEphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-04-14
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Version format compliance
  • Version 1.2: 2016-09-21
    Type: Database references, Source and taxonomy