crystal structure of the mouse CCT gamma apical domain (triclinic)

Experimental Data Snapshot

  • Resolution: 2.20 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.203 
  • R-Value Observed: 0.203 

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This is version 1.3 of the entry. See complete history


Crystal Structure of the Cct Gamma Apical Domain:: Implications for Substrate Binding to the Eukaryotic Cytosolic Chaperonin

Pappenberger, G.Wilsher, J.A.Roe, S.M.Counsell, D.J.Willison, K.R.Pearl, L.H.

(2002) J Mol Biol 318: 1367

  • DOI: https://doi.org/10.1016/s0022-2836(02)00190-0
  • Primary Citation of Related Structures:  
    1GML, 1GN1

  • PubMed Abstract: 

    The chaperonin containing TCP-1 (CCT, also known as TRiC) is the only member of the chaperonin family found in the cytosol of eukaryotes. Like other chaperonins, it assists the folding of newly synthesised proteins. It is, however, unique in its specificity towards only a small subset of non-native proteins. We determined two crystal structures of mouse CCTgamma apical domain at 2.2 A and 2.8 A resolution. They reveal a surface patch facing the inside of the torus that is highly evolutionarily conserved and specific for the CCTgamma apical domain. This putative substrate-binding region consists of predominantly positively charged side-chains. It suggests that the specificity of this apical domain towards its substrate, partially folded tubulin, is conferred by polar and electrostatic interactions. The site and nature of substrate interaction are thus profoundly different between CCT and its eubacterial homologue GroEL, consistent with their different functions in general versus specific protein folding assistance.

  • Organizational Affiliation

    Section of Structural Biology, The Institute of Cancer Research, London, UK.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B, C, D
178Mus musculusMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for P80318 (Mus musculus)
Explore P80318 
Go to UniProtKB:  P80318
IMPC:  MGI:104708
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP80318
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.20 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.203 
  • R-Value Observed: 0.203 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 51.74α = 89.97
b = 65.02β = 103.95
c = 65.47γ = 90.35
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-06-18
    Type: Initial release
  • Version 1.1: 2011-09-07
    Changes: Atomic model, Derived calculations, Non-polymer description, Other, Refinement description, Structure summary, Version format compliance
  • Version 1.2: 2019-05-08
    Changes: Data collection, Experimental preparation, Other
  • Version 1.3: 2023-12-13
    Changes: Data collection, Database references, Derived calculations, Other, Refinement description