3MKR

Crystal structure of yeast alpha/epsilon-COP subcomplex of the COPI vesicular coat


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.222 
  • R-Value Observed: 0.222 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structure of coatomer cage proteins and the relationship among COPI, COPII, and clathrin vesicle coats.

Lee, C.Goldberg, J.

(2010) Cell 142: 123-132

  • DOI: https://doi.org/10.1016/j.cell.2010.05.030
  • Primary Citation of Related Structures:  
    3MKQ, 3MKR

  • PubMed Abstract: 

    COPI-coated vesicles form at the Golgi apparatus from two cytosolic components, ARF G protein and coatomer, a heptameric complex that can polymerize into a cage to deform the membrane into a bud. Although coatomer shares a common evolutionary origin with COPII and clathrin vesicle coat proteins, the architectural relationship among the three cages is unclear. Strikingly, the alphabeta'-COP core of coatomer crystallizes as a triskelion in which three copies of a beta'-COP beta-propeller domain converge through their axial ends. We infer that the trimer constitutes the vertex of the COPI cage. Our model proposes that the COPI cage is intermediate in design between COPII and clathrin: COPI shares with clathrin an arrangement of three curved alpha-solenoid legs radiating from a common center, and COPI shares with COPII highly similar vertex interactions involving the axial ends of beta-propeller domains.


  • Organizational Affiliation

    Howard Hughes Medical Institute, Memorial Sloan-Kettering Cancer Center, 1275 York Avenue, New York, NY 10065, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Coatomer subunit epsilon291Bos taurusMutation(s): 1 
Gene Names: COPECOPE1
UniProt
Find proteins for Q28104 (Bos taurus)
Explore Q28104 
Go to UniProtKB:  Q28104
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ28104
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Coatomer subunit alpha320Bos taurusMutation(s): 0 
Gene Names: COPA
UniProt
Find proteins for Q27954 (Bos taurus)
Explore Q27954 
Go to UniProtKB:  Q27954
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ27954
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.222 
  • R-Value Observed: 0.222 
  • Space Group: I 4 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 176.629α = 90
b = 176.629β = 90
c = 141.177γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
SOLVEphasing
CNSrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-07-14
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2024-02-21
    Changes: Data collection, Database references