5W5C

Crystal structure of the primed SNARE-Complexin-Synaptotagmin-1 C2AB complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.196 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

The primed SNARE-complexin-synaptotagmin complex for neuronal exocytosis.

Zhou, Q.Zhou, P.Wang, A.L.Wu, D.Zhao, M.Sudhof, T.C.Brunger, A.T.

(2017) Nature 548: 420-425

  • DOI: 10.1038/nature23484
  • Primary Citation of Related Structures:  
    5W5D, 5W5C

  • PubMed Abstract: 
  • Synaptotagmin, complexin, and neuronal SNARE (soluble N-ethylmaleimide sensitive factor attachment protein receptor) proteins mediate evoked synchronous neurotransmitter release, but the molecular mechanisms mediating the cooperation between these molecules remain unclear ...

    Synaptotagmin, complexin, and neuronal SNARE (soluble N-ethylmaleimide sensitive factor attachment protein receptor) proteins mediate evoked synchronous neurotransmitter release, but the molecular mechanisms mediating the cooperation between these molecules remain unclear. Here we determine crystal structures of the primed pre-fusion SNARE-complexin-synaptotagmin-1 complex. These structures reveal an unexpected tripartite interface between synaptotagmin-1 and both the SNARE complex and complexin. Simultaneously, a second synaptotagmin-1 molecule interacts with the other side of the SNARE complex via the previously identified primary interface. Mutations that disrupt either interface in solution also severely impair evoked synchronous release in neurons, suggesting that both interfaces are essential for the primed pre-fusion state. Ca 2+ binding to the synaptotagmin-1 molecules unlocks the complex, allows full zippering of the SNARE complex, and triggers membrane fusion. The tripartite SNARE-complexin-synaptotagmin-1 complex at a synaptic vesicle docking site has to be unlocked for triggered fusion to start, explaining the cooperation between complexin and synaptotagmin-1 in synchronizing evoked release on the sub-millisecond timescale.


    Organizational Affiliation

    Department of Neurology and Neurological Sciences, Department of Structural Biology, Department of Photon Science, Stanford University, Stanford, California 94305, USA.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Vesicle-associated membrane protein 2A40Rattus norvegicusMutation(s): 0 
Gene Names: Vamp2Syb2
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Syntaxin-1AB67Rattus norvegicusMutation(s): 0 
Gene Names: Stx1aSap
UniProt
Find proteins for P32851 (Rattus norvegicus)
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Synaptosomal-associated protein 25C77Rattus norvegicusMutation(s): 0 
Gene Names: Snap25Snap
UniProt
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Synaptosomal-associated protein 25D65Rattus norvegicusMutation(s): 0 
Gene Names: Snap25Snap
UniProt
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  • Reference Sequence
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
Complexin-1E83Rattus norvegicusMutation(s): 0 
Gene Names: Cplx1
UniProt
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Entity ID: 6
MoleculeChainsSequence LengthOrganismDetailsImage
Synaptotagmin-1F282Rattus norvegicusMutation(s): 0 
Gene Names: Syt1
UniProt
Find proteins for P21707 (Rattus norvegicus)
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.196 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 85.663α = 90
b = 89.683β = 90
c = 91.728γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
Aimlessdata scaling
PHASERphasing
PDB_EXTRACTdata extraction
XDSdata reduction

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2017-08-23
    Type: Initial release
  • Version 1.1: 2017-08-30
    Changes: Database references
  • Version 1.2: 2017-09-06
    Changes: Database references