1G31

GP31 CO-CHAPERONIN FROM BACTERIOPHAGE T4


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.225 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Structural adaptations in the specialized bacteriophage T4 co-chaperonin Gp31 expand the size of the Anfinsen cage.

Hunt, J.F.van der Vies, S.M.Henry, L.Deisenhofer, J.

(1997) Cell 90: 361-371


  • PubMed Abstract: 
  • The Gp31 protein from bacteriophage T4 functionally substitutes for the bacterial co-chaperonin GroES in assisted protein folding reactions both in vitro and in vivo. But Gp31 is required for the folding and/or assembly of the T4 major capsid protein ...

    The Gp31 protein from bacteriophage T4 functionally substitutes for the bacterial co-chaperonin GroES in assisted protein folding reactions both in vitro and in vivo. But Gp31 is required for the folding and/or assembly of the T4 major capsid protein Gp23, and this requirement cannot be satisfied by GroES. The 2.3 A crystal structure of Gp31 shows that its tertiary and quaternary structures are similar to those of GroES despite the existence of only 14% sequence identity between the two proteins. However, Gp31 shows a series of structural adaptations which will increase the size and the hydrophilicity of the "Anfinsen cage," the enclosed cavity within the GroEL/GroES complex that is the location of the chaperonin-assisted protein folding reaction.


    Related Citations: 
    • Bacteriophage T4 Encodes a Co-Chaperonin that Can Substitute for Escherichia Coli Groes in Protein Folding
      Van Der Vies, S.M.,Gatenby, A.A.,Georgopoulos, C.
      (1994) Nature 368: 654
    • Interplay of Structure and Disorder in Cochaperonin Mobile Loops
      Landry, S.J.,Taher, A.,Georgopoulos, C.,Van Der Vies, S.M.
      (1996) Proc.Natl.Acad.Sci.USA 93: 11622
    • A Factor Preventing the Major Head Protein of Bacteriophage T4 from Random Aggregation
      Laemmli, U.K.,Beguin, F.,Gujer-Kellenberger, G.
      (1970) J.Mol.Biol. 47: 69


    Organizational Affiliation

    Howard Hughes Medical Institute and Department of Biochemistry, The University of Texas Southwestern Medical Center, Dallas 75235-9050, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
GP31
A, B, C, D, E, F, G
111Enterobacteria phage T4Gene Names: 31
Find proteins for P17313 (Enterobacteria phage T4)
Go to UniProtKB:  P17313
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
K
Query on K

Download SDF File 
Download CCD File 
A, B, C, D, E, F, G
POTASSIUM ION
K
NPYPAHLBTDXSSS-UHFFFAOYSA-N
 Ligand Interaction
PO4
Query on PO4

Download SDF File 
Download CCD File 
A, B, C, D, E, F, G
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.225 
  • Space Group: P 42 21 2
Unit Cell:
Length (Å)Angle (°)
a = 157.677α = 90.00
b = 157.677β = 90.00
c = 90.932γ = 90.00
Software Package:
Software NamePurpose
X-PLORphasing
X-PLORrefinement
DENZOdata reduction
SCALEPACKdata scaling
X-PLORmodel building

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1998-08-26
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-11-29
    Type: Derived calculations, Other