3MKR

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.222 

wwPDB Validation 3D Report Full Report


This is version 1.1 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: 10.1016/j.cell.2010.05.030
  • Primary Citation of Related Structures:  

  • 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 ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Coatomer subunit epsilon
A
291Bos taurusMutation(s): 0 
Gene Names: COPE (COPE1)
Find proteins for Q28104 (Bos taurus)
Go to Gene View: COPE
Go to UniProtKB:  Q28104
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Coatomer subunit alpha
B
320Bos taurusMutation(s): 0 
Gene Names: COPA
Find proteins for Q27954 (Bos taurus)
Go to Gene View: COPA
Go to UniProtKB:  Q27954
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.222 
  • Space Group: I 4 2 2
Unit Cell:
Length (Å)Angle (°)
a = 176.629α = 90.00
b = 176.629β = 90.00
c = 141.177γ = 90.00
Software Package:
Software NamePurpose
SOLVEphasing
HKL-2000data scaling
HKL-2000data collection
HKL-2000data reduction
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2010-04-15 
  • Released Date: 2010-07-14 
  • Deposition Author(s): Lee, C., Goldberg, J.

Revision History 

  • Version 1.0: 2010-07-14
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance