3MKQ

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

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.221 
  • R-Value Observed: 0.221 

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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:  
    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 ...

    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
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(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Coatomer beta'-subunitA, C, E814Saccharomyces cerevisiae YJM789Mutation(s): 1 
Gene Names: SEC27, SCY_1929
UniProt
Find proteins for A6ZU46 (Saccharomyces cerevisiae (strain YJM789))
Explore A6ZU46 
Go to UniProtKB:  A6ZU46
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA6ZU46
Protein Feature View
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  • Reference Sequence
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(by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Coatomer subunit alphaB, D, F177Saccharomyces cerevisiaeMutation(s): 2 
Gene Names: RET1, COP1, SEC33, YDL145C, D1578
UniProt
Find proteins for P53622 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P53622 
Go to UniProtKB:  P53622
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP53622
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.221 
  • R-Value Observed: 0.221 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 152.638α = 90
b = 152.638β = 90
c = 294.535γ = 120
Software Package:
Software NamePurpose
HKL-2000data collection
SOLVEphasing
CNSrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

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

Revision History  (Full details and data files)

  • Version 1.0: 2010-07-14
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Source and taxonomy, Version format compliance