3RK3

Truncated SNARE complex with complexin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.50 Å
  • R-Value Free: 0.316 
  • R-Value Work: 0.270 
  • R-Value Observed: 0.272 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Complexin cross-links prefusion SNAREs into a zigzag array.

Kummel, D.Krishnakumar, S.S.Radoff, D.T.Li, F.Giraudo, C.G.Pincet, F.Rothman, J.E.Reinisch, K.M.

(2011) Nat Struct Mol Biol 18: 927-933

  • DOI: https://doi.org/10.1038/nsmb.2101
  • Primary Citation of Related Structures:  
    3RK2, 3RK3, 3RL0

  • PubMed Abstract: 

    Complexin prevents SNAREs from releasing neurotransmitters until an action potential arrives at the synapse. To understand the mechanism for this inhibition, we determined the structure of complexin bound to a mimetic of a prefusion SNAREpin lacking the portion of the v-SNARE that zippers last to trigger fusion. The 'central helix' of complexin is anchored to one SNARE complex, while its 'accessory helix' extends away at ~45° and bridges to a second complex, occupying the vacant v-SNARE binding site to inhibit fusion. We expected the accessory helix to compete with the v-SNARE for t-SNARE binding but found instead that the interaction occurs intermolecularly. Thus, complexin organizes the SNAREs into a zigzag topology that, when interposed between the vesicle and plasma membranes, is incompatible with fusion.


  • Organizational Affiliation

    Department of Cell Biology, Yale University School of Medicine, New Haven, Connecticut, USA.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Vamp237Homo sapiensMutation(s): 0 
Gene Names: VAMP2SYB2
UniProt & NIH Common Fund Data Resources
Find proteins for P63027 (Homo sapiens)
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Go to UniProtKB:  P63027
PHAROS:  P63027
GTEx:  ENSG00000220205 
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UniProt GroupP63027
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Syntaxin 1a65Rattus norvegicusMutation(s): 0 
Gene Names: Stx1aSap
UniProt
Find proteins for P32851 (Rattus norvegicus)
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UniProt GroupP32851
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  • Reference Sequence
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
SNAP2581Homo sapiensMutation(s): 0 
Gene Names: SNAP25SNAP
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Find proteins for P60880 (Homo sapiens)
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PHAROS:  P60880
GTEx:  ENSG00000132639 
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UniProt GroupP60880
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  • Reference Sequence
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
SNAP2565Homo sapiensMutation(s): 0 
Gene Names: SNAP25SNAP
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Find proteins for P60880 (Homo sapiens)
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Go to UniProtKB:  P60880
PHAROS:  P60880
GTEx:  ENSG00000132639 
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UniProt GroupP60880
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  • Reference Sequence
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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
Complexin-163Homo sapiensMutation(s): 3 
Gene Names: CPLX1
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Find proteins for O14810 (Homo sapiens)
Explore O14810 
Go to UniProtKB:  O14810
PHAROS:  O14810
GTEx:  ENSG00000168993 
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UniProt GroupO14810
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.50 Å
  • R-Value Free: 0.316 
  • R-Value Work: 0.270 
  • R-Value Observed: 0.272 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 75.861α = 90
b = 52.729β = 95.21
c = 128.712γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
PHASERphasing
REFMACrefinement
HKL-2000data reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-07-27
    Type: Initial release
  • Version 1.1: 2011-08-24
    Changes: Database references
  • Version 1.2: 2023-09-13
    Changes: Data collection, Database references, Refinement description