Structural Identification of a conserved appendage domain in the carboxyl-terminus of the COPI gamma-subunit.

Experimental Data Snapshot

  • Resolution: 2.31 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.199 
  • R-Value Observed: 0.199 

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Conserved Structural Motifs in Intracellular Trafficking Pathways. Structure of the gammaCOP Appendage Domain.

Hoffman, G.R.Rahl, P.B.Collins, R.N.Cerione, R.A.

(2003) Mol Cell 12: 615-625

  • DOI: https://doi.org/10.1016/j.molcel.2003.08.002
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The formation of coated vesicles is a fundamental step in many intracellular trafficking pathways. COPI and clathrin represent two important and distinct sets of vesicle coating machinery, involved primarily in mediating intra-Golgi and endocytic transport, respectively. Here we identify an important functional region at the carboxyl terminus of the gamma subunit of the COPI complex (gammaCOP) and describe the X-ray crystal structure of this domain at 2.3 A resolution. This domain of gammaCOP exhibits unexpected structural similarity to the carboxyl-terminal appendage domains of the alpha and beta subunits of the AP2 adaptor proteins, integral components of clathrin-coated vesicles. The remarkable structural conservation exhibited by the gammaCOP appendage domain, coupled with functional data and primary sequence analysis, supports a model of COPI function with significant structural and mechanistic parallels to vesicular transport by the clathrin/AP2 system.

  • Organizational Affiliation

    Department of Molecular Medicine, Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14853, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Coatomer gamma subunit322Bos taurusMutation(s): 0 
Gene Names: COPG
Find proteins for P53620 (Bos taurus)
Explore P53620 
Go to UniProtKB:  P53620
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP53620
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.31 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.199 
  • R-Value Observed: 0.199 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 49.57α = 90
b = 89.56β = 90
c = 98.6γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-10-14
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-10-11
    Changes: Refinement description
  • Version 1.4: 2018-01-31
    Changes: Experimental preparation
  • Version 1.5: 2024-02-14
    Changes: Data collection, Database references, Derived calculations