6ZG5

COPII on membranes, outer coat right-handed rod, class1


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 40.0 Å
  • Aggregation State: 3D ARRAY 
  • Reconstruction Method: SUBTOMOGRAM AVERAGING 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structure of the complete, membrane-assembled COPII coat reveals a complex interaction network.

Hutchings, J.Stancheva, V.G.Brown, N.R.Cheung, A.C.M.Miller, E.A.Zanetti, G.

(2021) Nat Commun 12: 2034-2034

  • DOI: https://doi.org/10.1038/s41467-021-22110-6
  • Primary Citation of Related Structures:  
    6ZG5, 6ZG6, 6ZGA, 6ZL0

  • PubMed Abstract: 

    COPII mediates Endoplasmic Reticulum to Golgi trafficking of thousands of cargoes. Five essential proteins assemble into a two-layer architecture, with the inner layer thought to regulate coat assembly and cargo recruitment, and the outer coat forming cages assumed to scaffold membrane curvature. Here we visualise the complete, membrane-assembled COPII coat by cryo-electron tomography and subtomogram averaging, revealing the full network of interactions within and between coat layers. We demonstrate the physiological importance of these interactions using genetic and biochemical approaches. Mutagenesis reveals that the inner coat alone can provide membrane remodelling function, with organisational input from the outer coat. These functional roles for the inner and outer coats significantly move away from the current paradigm, which posits membrane curvature derives primarily from the outer coat. We suggest these interactions collectively contribute to coat organisation and membrane curvature, providing a structural framework to understand regulatory mechanisms of COPII trafficking and secretion.


  • Organizational Affiliation

    Institute of Structural and Molecular Biology, Birkbeck College, London, UK.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Protein transport protein SEC31
A, C
1,273Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: SEC31WEB1YDL195WD1229
Membrane Entity: Yes 
UniProt
Find proteins for P38968 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P38968 
Go to UniProtKB:  P38968
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP38968
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Protein transport protein SEC13297Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: SEC13ANU3YLR208WL8167.4
Membrane Entity: Yes 
UniProt
Find proteins for Q04491 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore Q04491 
Go to UniProtKB:  Q04491
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ04491
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Protein transport protein SEC13D [auth F]297Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: SEC13ANU3YLR208WL8167.4
Membrane Entity: Yes 
UniProt
Find proteins for Q04491 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore Q04491 
Go to UniProtKB:  Q04491
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ04491
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 40.0 Å
  • Aggregation State: 3D ARRAY 
  • Reconstruction Method: SUBTOMOGRAM AVERAGING 
EM Software:
TaskSoftware PackageVersion
RECONSTRUCTIONDynamo

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Biotechnology and Biological Sciences Research Council (BBSRC)United KingdomBB/T002670/1
European Research Council (ERC)United Kingdom852915 CRYTOCOP

Revision History  (Full details and data files)

  • Version 1.0: 2021-02-17
    Type: Initial release
  • Version 1.1: 2021-04-14
    Changes: Database references
  • Version 1.2: 2024-05-01
    Changes: Data collection, Database references, Refinement description