8EKI

CryoEM structure of the Dsl1 complex bound to SNAREs Sec20 and Use1


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.50 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

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This is version 1.3 of the entry. See complete history


Literature

Structure of a membrane tethering complex incorporating multiple SNAREs.

DAmico, K.A.Stanton, A.E.Shirkey, J.D.Travis, S.M.Jeffrey, P.D.Hughson, F.M.

(2024) Nat Struct Mol Biol 31: 246-254

  • DOI: https://doi.org/10.1038/s41594-023-01164-8
  • Primary Citation of Related Structures:  
    8EKI, 8FTU

  • PubMed Abstract: 

    Most membrane fusion reactions in eukaryotic cells are mediated by multisubunit tethering complexes (MTCs) and SNARE proteins. MTCs are much larger than SNAREs and are thought to mediate the initial attachment of two membranes. Complementary SNAREs then form membrane-bridging complexes whose assembly draws the membranes together for fusion. Here we present a cryo-electron microscopy structure of the simplest known MTC, the 255-kDa Dsl1 complex of Saccharomyces cerevisiae, bound to the two SNAREs that anchor it to the endoplasmic reticulum. N-terminal domains of the SNAREs form an integral part of the structure, stabilizing a Dsl1 complex configuration with unexpected similarities to the 850-kDa exocyst MTC. The structure of the SNARE-anchored Dsl1 complex and its comparison with exocyst reveal what are likely to be common principles underlying MTC function. Our structure also implies that tethers and SNAREs can work together as a single integrated machine.


  • Organizational Affiliation

    Department of Molecular Biology, Princeton University, Princeton, NJ, USA.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Protein transport protein SEC20275Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: SEC20YDR498CD9719.4
UniProt
Find proteins for P28791 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Go to UniProtKB:  P28791
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UniProt GroupP28791
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Protein transport protein USE1212Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: USE1SLT1YGL098W
UniProt
Find proteins for P53146 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Go to UniProtKB:  P53146
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UniProt GroupP53146
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Protein transport protein TIP20701Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: TIP20TIP1YGL145W
UniProt
Find proteins for P33891 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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UniProt GroupP33891
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
Protein transport protein SEC39709Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: SEC39DSL3YLR440C
UniProt
Find proteins for Q12745 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Go to UniProtKB:  Q12745
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UniProt GroupQ12745
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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
Protein transport protein DSL1783Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: DSL1YNL258CN0842
UniProt
Find proteins for P53847 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Go to UniProtKB:  P53847
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UniProt GroupP53847
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Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.50 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
MODEL REFINEMENTPHENIX
RECONSTRUCTIONCoot0.8.9.1

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesR01GM071574
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesT32GM007388

Revision History  (Full details and data files)

  • Version 1.0: 2023-10-04
    Type: Initial release
  • Version 1.1: 2024-01-17
    Changes: Database references
  • Version 1.2: 2024-01-24
    Changes: Database references
  • Version 1.3: 2024-02-28
    Changes: Database references