6VKL

Negative stain reconstruction of the yeast exocyst octameric complex.

  • Classification: EXOCYTOSIS
  • Organism(s): Saccharomyces cerevisiae S288C
  • Mutation(s): No 

  • Deposited: 2020-01-21 Released: 2020-07-29 
  • Deposition Author(s): Frost, A., Munson, M.
  • Funding Organization(s): National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 15.0 Å
  • Resolution: 15.0 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report



Literature

Exocyst structural changes associated with activation of tethering downstream of Rho/Cdc42 GTPases.

Rossi, G.Lepore, D.Kenner, L.Czuchra, A.B.Plooster, M.Frost, A.Munson, M.Brennwald, P.

(2020) J Cell Biol 219

  • DOI: 10.1083/jcb.201904161
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • The exocyst complex plays a critical role in determining both temporal and spatial dynamics of exocytic vesicle tethering and fusion with the plasma membrane. However, the mechanism by which the exocyst functions and how it is regulated remain poorly ...

    The exocyst complex plays a critical role in determining both temporal and spatial dynamics of exocytic vesicle tethering and fusion with the plasma membrane. However, the mechanism by which the exocyst functions and how it is regulated remain poorly understood. Here we describe a novel biochemical assay for the examination of exocyst function in vesicle tethering. Importantly, the assay is stimulated by gain-of-function mutations in the Exo70 component of the exocyst, selected for their ability to bypass Rho/Cdc42 activation in vivo. Single-particle electron microscopy and 3D reconstructions of negatively stained exocyst complexes reveal a structural change in the mutant exocyst that exposes a binding site for the v-SNARE. We demonstrate a v-SNARE requirement in our tethering assay and increased v-SNARE binding to exocyst gain-of-function complexes. Together, these data suggest an allosteric mechanism for activation involving a conformational change in one subunit of the complex, which is relayed through the complex to regulate its biochemical activity in vitro, as well as overall function in vivo.


    Related Citations: 
    • Cryo-EM structure of the exocyst complex.
      Mei, K., Li, Y., Wang, S., Shao, G., Wang, J., Ding, Y., Luo, G., Yue, P., Liu, J.J., Wang, X., Dong, M.Q., Wang, H.W., Guo, W.
      (2018) Nat Struct Mol Biol 25: 139
    • Subunit connectivity, assembly determinants and architecture of the yeast exocyst complex.
      Heider, M.R., Gu, M., Duffy, C.M., Mirza, A.M., Marcotte, L.L., Walls, A.C., Farrall, N., Hakhverdyan, Z., Field, M.C., Rout, M.P., Frost, A., Munson, M.
      (2016) Nat Struct Mol Biol 23: 59

    Organizational Affiliation

    Department of Cell Biology and Physiology, University of North Carolina School of Medicine, Chapel Hill, NC.



Macromolecules

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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Exocyst complex component SEC3A1336Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: SEC3PSL1YER008C
Find proteins for P33332 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Go to UniProtKB:  P33332
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  • Reference Sequence

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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Exocyst complex component SEC5B971Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: SEC5YDR166CYD8358.20CYD9489.01C
Find proteins for P89102 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Go to UniProtKB:  P89102
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  • Reference Sequence

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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Exocyst complex component SEC6C805Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: SEC6YIL068C
Find proteins for P32844 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Go to UniProtKB:  P32844
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  • Reference Sequence

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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
Exocyst complex component SEC8D1065Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: SEC8YPR055WYP9499.11
Find proteins for P32855 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Go to UniProtKB:  P32855
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  • Reference Sequence

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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetails
Exocyst complex component SEC10E871Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: SEC10YLR166CL9362.12
Find proteins for Q06245 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Go to UniProtKB:  Q06245
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Entity ID: 6
MoleculeChainsSequence LengthOrganismDetails
Exocyst complex component SEC15F910Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: SEC15YGL233W
Find proteins for P22224 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Go to UniProtKB:  P22224
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  • Reference Sequence

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Entity ID: 7
MoleculeChainsSequence LengthOrganismDetails
Exocyst complex component EXO70G623Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: EXO70YJL085WJ0932
Find proteins for P19658 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Go to UniProtKB:  P19658
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Entity ID: 8
MoleculeChainsSequence LengthOrganismDetails
Exocyst complex component EXO84H753Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: EXO84USA3YBR102CYBR0831
Find proteins for P38261 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P38261 
Go to UniProtKB:  P38261
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 15.0 Å
  • Resolution: 15.0 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data

  • Deposited Date: 2020-01-21 
  • Released Date: 2020-07-29 
  • Deposition Author(s): Frost, A., Munson, M.

Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United States2R01GM068803

Revision History 

  • Version 1.0: 2020-07-29
    Type: Initial release