3RK2

Truncated SNARE complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.227 
  • R-Value Observed: 0.230 

wwPDB Validation   3D Report Full Report


This is version 1.1 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: 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 ...

    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
MoleculeChainsSequence LengthOrganismDetailsImage
Vesicle-associated membrane protein 2A, E37Homo 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
Protein Feature View
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Syntaxin-1AB, F65Rattus norvegicusMutation(s): 0 
Gene Names: Stx1aSap
UniProt
Find proteins for P32851 (Rattus norvegicus)
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Go to UniProtKB:  P32851
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UniProt GroupP32851
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Synaptosomal-associated protein 25C, G81Homo sapiensMutation(s): 0 
Gene Names: SNAP25SNAP
UniProt & NIH Common Fund Data Resources
Find proteins for P60880 (Homo sapiens)
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Go to UniProtKB:  P60880
PHAROS:  P60880
GTEx:  ENSG00000132639 
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UniProt GroupP60880
Protein Feature View
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  • Reference Sequence
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Synaptosomal-associated protein 25D, H65Homo sapiensMutation(s): 0 
Gene Names: SNAP25SNAP
UniProt & NIH Common Fund Data Resources
Find proteins for P60880 (Homo sapiens)
Explore P60880 
Go to UniProtKB:  P60880
PHAROS:  P60880
GTEx:  ENSG00000132639 
Entity Groups  
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UniProt GroupP60880
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  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.227 
  • R-Value Observed: 0.230 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 27.627α = 83.38
b = 39.769β = 89.94
c = 102.275γ = 89.87
Software Package:
Software NamePurpose
HKL-2000data collection
PHASERphasing
REFMACrefinement
HKL-2000data reduction
SCALEPACKdata scaling

Structure Validation

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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