4IN3

Crystal Structure of the Chs5-Bch1 Exomer Cargo Adaptor Complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.94 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.237 
  • R-Value Observed: 0.240 

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This is version 1.2 of the entry. See complete history


Literature

The exomer cargo adaptor features a flexible hinge domain.

Richardson, B.C.Fromme, J.C.

(2013) Structure 21: 486-492

  • DOI: 10.1016/j.str.2013.01.003
  • Primary Citation of Related Structures:  
    4IN3

  • PubMed Abstract: 
  • Exomer is a cargo adaptor that mediates the sorting of specific plasma membrane proteins into vesicles at the trans-Golgi network. Cargo adaptors must bind to multiple partners, including their cargo, regulatory proteins, and the membrane surface. During biogenesis of a vesicle, the membrane makes a transition from a relatively flat surface to one of high curvature, requiring cargo adaptors to somehow maintain protein-protein and protein-membrane interactions on a changing membrane environment ...

    Exomer is a cargo adaptor that mediates the sorting of specific plasma membrane proteins into vesicles at the trans-Golgi network. Cargo adaptors must bind to multiple partners, including their cargo, regulatory proteins, and the membrane surface. During biogenesis of a vesicle, the membrane makes a transition from a relatively flat surface to one of high curvature, requiring cargo adaptors to somehow maintain protein-protein and protein-membrane interactions on a changing membrane environment. Here, we present the crystal structure of a tetrameric Chs5/Bch1 exomer complex and use small-angle X-ray scattering to demonstrate its flexibility in solution. The structural data suggest that the complex flexes primarily around the dimeric N-terminal domain of the Chs5 subunits, which adopts a noncanonical β sandwich fold. We propose that this flexible hinge domain enables exomer to maintain interactions in the context of a dynamic membrane environment.


    Organizational Affiliation

    Department of Molecular Biology and Genetics, Weill Institute for Cell and Molecular Biology, Cornell University, Ithaca, NY 14853, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Chitin biosynthesis protein CHS5A, C82Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: CHS5CAL3YLR330WL8543.18
UniProt
Find proteins for Q12114 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore Q12114 
Go to UniProtKB:  Q12114
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ12114
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Protein BCH1B, D739Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: BCH1YMR237WYM9959.19
UniProt
Find proteins for Q05029 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore Q05029 
Go to UniProtKB:  Q05029
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ05029
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.94 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.237 
  • R-Value Observed: 0.240 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 141.391α = 90
b = 155.686β = 95.34
c = 99.054γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PHASERphasing
RESOLVEphasing
PHENIXrefinement
PDB_EXTRACTdata extraction
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-03-06
    Type: Initial release
  • Version 1.1: 2013-03-27
    Changes: Database references
  • Version 1.2: 2017-11-15
    Changes: Refinement description