4WJW

Crystal Structure of the Chs5-Chs6 Exomer Cargo Adaptor Complex Bound to portion of Chs3


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.59 Å
  • R-Value Free: 0.211 
  • R-Value Work: 0.180 
  • R-Value Observed: 0.181 

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This is version 1.1 of the entry. See complete history


Literature

Distinct N-terminal regions of the exomer secretory vesicle cargo Chs3 regulate its trafficking itinerary.

Weiskoff, A.M.Fromme, J.C.

(2014) Front Cell Dev Biol 2: 47-47

  • DOI: 10.3389/fcell.2014.00047
  • Primary Citation of Related Structures:  
    4WJW

  • PubMed Abstract: 
  • Cells transport integral membrane proteins between organelles by sorting them into vesicles. Cargo adaptors act to recognize sorting signals in transmembrane cargos and to interact with coat complexes that aid in vesicle biogenesis. No coat proteins have yet been identified that generate secretory vesicles from the trans-Golgi network (TGN) to the plasma membrane, but the exomer complex has been identified as a cargo adaptor complex that mediates transport of several proteins in this pathway ...

    Cells transport integral membrane proteins between organelles by sorting them into vesicles. Cargo adaptors act to recognize sorting signals in transmembrane cargos and to interact with coat complexes that aid in vesicle biogenesis. No coat proteins have yet been identified that generate secretory vesicles from the trans-Golgi network (TGN) to the plasma membrane, but the exomer complex has been identified as a cargo adaptor complex that mediates transport of several proteins in this pathway. Chs3, the most well-studied exomer cargo, cycles between the TGN and the plasma membrane in synchrony with the cell cycle, providing an opportunity to study regulation of proteins that cycle in response to signaling. Here we show that different segments of the Chs3 N-terminus mediate distinct trafficking steps. Residues 10-27, known to mediate retention, also appear to play a role in internalization. Residues 28-52 are involved in transport to the plasma membrane and recycling out of endosomes to prevent degradation in the vacuole. We also present the crystal structure of residues 10-27 bound to the exomer complex, suggesting different cargo adaptors could compete for binding to this segment, providing a potential mechanism for regulation.


    Organizational Affiliation

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



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Chitin biosynthesis protein CHS5A77Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: CHS5CAL3YLR330WL8543.18
Find proteins for Q12114 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Go to UniProtKB:  Q12114
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Chitin biosynthesis protein CHS6B761Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: CHS6CSD3YJL099WJ0838
Find proteins for P40955 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Go to UniProtKB:  P40955
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
CHITIN SYNTHASE 3C [auth P]19Saccharomyces cerevisiaeMutation(s): 0 
EC: 2.4.1.16
Find proteins for P29465 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P29465 
Go to UniProtKB:  P29465
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.59 Å
  • R-Value Free: 0.211 
  • R-Value Work: 0.180 
  • R-Value Observed: 0.181 
  • Space Group: P 63 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 218.613α = 90
b = 218.613β = 90
c = 137.848γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-10-15
    Type: Initial release
  • Version 1.1: 2014-12-03
    Changes: Database references