3GQH

Crystal Structure of the Bacteriophage phi29 gene product 12 C-terminal fragment


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.228 
  • R-Value Observed: 0.229 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Crystallographic insights into the autocatalytic assembly mechanism of a bacteriophage tail spike.

Xiang, Y.Leiman, P.G.Li, L.Grimes, S.Anderson, D.L.Rossmann, M.G.

(2009) Mol Cell 34: 375-386

  • DOI: 10.1016/j.molcel.2009.04.009
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • The tailed bacteriophage phi29 has 12 "appendages" (gene product 12, gp12) attached to its neck region that participate in host cell recognition and entry. In the cell, monomeric gp12 undergoes proteolytic processing that releases the C-terminal doma ...

    The tailed bacteriophage phi29 has 12 "appendages" (gene product 12, gp12) attached to its neck region that participate in host cell recognition and entry. In the cell, monomeric gp12 undergoes proteolytic processing that releases the C-terminal domain during assembly into trimers. We report here crystal structures of the protein before and after catalytic processing and show that the C-terminal domain of gp12 is an "autochaperone" that aids trimerization. We also show that autocleavage of the C-terminal domain is a posttrimerization event that is followed by a unique ATP-dependent release. The posttranslationally modified N-terminal part has three domains that function to attach the appendages to the phage, digest the cell wall teichoic acids, and bind irreversibly to the host, respectively. Structural and sequence comparisons suggest that some eukaryotic and bacterial viruses as well as bacterial adhesins might have a similar maturation mechanism as is performed by phi29 gp12 for Bacillus subtilis.


    Organizational Affiliation

    Department of Biological Sciences, Purdue University, West Lafayette, IN 47907, USA.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Preneck appendage protein
A, B, C
163Bacillus virus phi29Mutation(s): 0 
Gene Names: 12gene product 12
Find proteins for P20345 (Bacillus phage phi29)
Go to UniProtKB:  P20345
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.228 
  • R-Value Observed: 0.229 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 81.144α = 90
b = 84.158β = 90
c = 86.228γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
PDB_EXTRACTdata extraction
HKL-2000data reduction
HKL-2000data scaling
SHARPphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-05-26
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2012-03-21
    Changes: Database references