4B2T

The crystal structures of the eukaryotic chaperonin CCT reveal its functional partitioning


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 5.5 Å
  • R-Value Free: 0.399 
  • R-Value Work: 0.340 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Re-refinement Note

This entry reflects an alternative modeling of the original data in: 

  • 2XSM - determined by Munoz, I.G., Yebenes, H., Zhou, M., Mesa, P., Serna, M., Bragado-Nilsson, E., Beloso, A., Robinson, C.V., Valpuesta, J.M., Montoya, G.  

Literature

The Crystal Structures of the Eukaryotic Chaperonin Cct Reveal its Functional Partitioning

Kalisman, N.Schroder, G.F.Levitt, M.

(2013) Structure 21: 540

  • DOI: 10.1016/j.str.2013.01.017
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • In eukaryotes, CCT is essential for the correct and efficient folding of many cytosolic proteins, most notably actin and tubulin. Structural studies of CCT have been hindered by the failure of standard crystallographic analysis to resolve its eight d ...

    In eukaryotes, CCT is essential for the correct and efficient folding of many cytosolic proteins, most notably actin and tubulin. Structural studies of CCT have been hindered by the failure of standard crystallographic analysis to resolve its eight different subunit types at low resolutions. Here, we exhaustively assess the R value fit of all possible CCT models to available crystallographic data of the closed and open forms with resolutions of 3.8 Å and 5.5 Å, respectively. This unbiased analysis finds the native subunit arrangements with overwhelming significance. The resulting structures provide independent crystallographic proof of the subunit arrangement of CCT and map major asymmetrical features of the particle onto specific subunits. The actin and tubulin substrates both bind around subunit CCT6, which shows other structural anomalies. CCT is thus clearly partitioned, both functionally and evolutionary, into a substrate-binding side that is opposite to the ATP-hydrolyzing side.


    Related Citations: 
    • Crystal Structure of the Open Conformation of the Mammalian Chaperonin Cct in Complex with Tubulin.
      Munoz, I.G.,Yebenes, H.,Zhou, M.,Mesa, P.,Serna, M.,Park, A.Y.,Bragado-Nilsson, E.,Beloso, A.,De Carcer, G.,Malumbres, M.,Robinson, C.V.,Valpuesta, J.M.,Montoya, G.
      (2011) Nat.Struct.Mol.Biol. 18: 14


    Organizational Affiliation

    Department of Structural Biology, Stanford University School of Medicine, Stanford, CA 94305, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
T-COMPLEX PROTEIN 1 SUBUNIT ALPHA
A, a
556Bos taurusMutation(s): 0 
Gene Names: TCP1 (CCT1)
Find proteins for Q32L40 (Bos taurus)
Go to Gene View: TCP1
Go to UniProtKB:  Q32L40
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
T-COMPLEX PROTEIN 1 SUBUNIT BETA
B, b
535Bos taurusMutation(s): 0 
Gene Names: CCT2
Find proteins for Q3ZBH0 (Bos taurus)
Go to Gene View: CCT2
Go to UniProtKB:  Q3ZBH0
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
T-COMPLEX PROTEIN 1 SUBUNIT DELTA
D, d
542Bos taurusMutation(s): 0 
Gene Names: CCT4
Find proteins for Q2T9X2 (Bos taurus)
Go to Gene View: CCT4
Go to UniProtKB:  Q2T9X2
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
T-COMPLEX PROTEIN 1 SUBUNIT EPSILON
E, e
541Bos taurusMutation(s): 0 
Gene Names: CCT5
Find proteins for F1MWD3 (Bos taurus)
Go to Gene View: CCT5
Go to UniProtKB:  F1MWD3
Entity ID: 5
MoleculeChainsSequence LengthOrganismDetails
T-COMPLEX PROTEIN 1 SUBUNIT GAMMA
G, g
545Bos taurusMutation(s): 0 
Gene Names: CCT3
Find proteins for Q3T0K2 (Bos taurus)
Go to Gene View: CCT3
Go to UniProtKB:  Q3T0K2
Entity ID: 6
MoleculeChainsSequence LengthOrganismDetails
T-COMPLEX PROTEIN 1 SUBUNIT ETA
H, h
543Bos taurusMutation(s): 0 
Gene Names: CCT7
Find proteins for Q2NKZ1 (Bos taurus)
Go to Gene View: CCT7
Go to UniProtKB:  Q2NKZ1
Entity ID: 7
MoleculeChainsSequence LengthOrganismDetails
T-COMPLEX PROTEIN 1 SUBUNIT THETA
Q, q
548Bos taurusMutation(s): 0 
Gene Names: CCT8
Find proteins for Q3ZCI9 (Bos taurus)
Go to Gene View: CCT8
Go to UniProtKB:  Q3ZCI9
Entity ID: 8
MoleculeChainsSequence LengthOrganismDetails
T-COMPLEX PROTEIN 1 SUBUNIT ZETA
Z, z
531Bos taurusMutation(s): 0 
Gene Names: CCT6A
Find proteins for Q3MHL7 (Bos taurus)
Go to Gene View: CCT6A
Go to UniProtKB:  Q3MHL7
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 5.5 Å
  • R-Value Free: 0.399 
  • R-Value Work: 0.340 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 272.700α = 90.00
b = 313.500β = 90.00
c = 158.300γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-03-20
    Type: Initial release
  • Version 1.1: 2013-04-03
    Type: Database references
  • Version 1.2: 2013-04-17
    Type: Database references
  • Version 1.3: 2013-06-05
    Type: Other, Structure summary