2WZP

Structures of Lactococcal Phage p2 Baseplate Shed Light on a Novel Mechanism of Host Attachment and Activation in Siphoviridae


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.208 
  • R-Value Work: 0.179 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of Lactococcal Phage P2 Baseplate and its Mechanism of Activation.

Sciara, G.Bebeacua, C.Bron, P.Tremblay, D.Ortiz-Lombardia, M.Lichiere, J.Van Heel, M.Campanacci, V.Moineau, S.Cambillau, C.

(2010) Proc.Natl.Acad.Sci.USA 107: 6852

  • DOI: 10.1073/pnas.1000232107
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Siphoviridae is the most abundant viral family on earth which infects bacteria as well as archaea. All known siphophages infecting gram+ Lactococcus lactis possess a baseplate at the tip of their tail involved in host recognition and attachment. Here ...

    Siphoviridae is the most abundant viral family on earth which infects bacteria as well as archaea. All known siphophages infecting gram+ Lactococcus lactis possess a baseplate at the tip of their tail involved in host recognition and attachment. Here, we report analysis of the p2 phage baseplate structure by X-ray crystallography and electron microscopy and propose a mechanism for the baseplate activation during attachment to the host cell. This approximately 1 MDa, Escherichia coli-expressed baseplate is composed of three protein species, including six trimers of the receptor-binding protein (RBP). RBPs host-recognition domains point upwards, towards the capsid, in agreement with the electron-microscopy map of the free virion. In the presence of Ca(2+), a cation mandatory for infection, the RBPs rotated 200 degrees downwards, presenting their binding sites to the host, and a channel opens at the bottom of the baseplate for DNA passage. These conformational changes reveal a novel siphophage activation and host-recognition mechanism leading ultimately to DNA ejection.


    Related Citations: 
    • Lactococcal Bacteriophage P2 Receptor-Binding Protein Structure Suggests a Common Ancestor Gene with Bacterial and Mammalian Viruses.
      Spinelli, S.,Desmyter, A.,Verrips, C.T.,De Haard, H.J.W.,Moineau, S.,Cambillau, C.
      (2006) Nat.Struct.Mol.Biol. 13: 85


    Organizational Affiliation

    Architecture et Fonction des Macromolécules Biologiques, UMR 6098 Centre National de la Recherche Scientifique 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
PUTATIVE RECEPTOR BINDING PROTEIN
A, B, C, G, H, I
266Lactococcus phage p2Mutation(s): 0 
Gene Names: rbp
Find proteins for Q71AW2 (Lactococcus phage p2)
Go to UniProtKB:  Q71AW2
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
CAMELID VHH5
D, E, F, J, K, L
123N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
LACTOCOCCAL PHAGE P2 ORF15
P, Q
326Lactococcus phage p2Mutation(s): 0 
Find proteins for D3WAD3 (Lactococcus phage p2)
Go to UniProtKB:  D3WAD3
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
LACTOCOCCAL PHAGE P2 ORF16
R
375Lactococcus phage p2Mutation(s): 0 
Find proteins for D3KFX4 (Lactococcus phage p2)
Go to UniProtKB:  D3KFX4
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.208 
  • R-Value Work: 0.179 
  • Space Group: H 3 2
Unit Cell:
Length (Å)Angle (°)
a = 202.881α = 90.00
b = 202.881β = 90.00
c = 760.520γ = 120.00
Software Package:
Software NamePurpose
PHASERphasing
BUSTERrefinement
SCALAdata scaling
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-02-16
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance