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 1.1 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 ...

    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
Vamp2A37Homo sapiensMutation(s): 0 
Gene Names: VAMP2SYB2
Find proteins for P63027 (Homo sapiens)
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PHAROS  P63027
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Syntaxin 1aB65Rattus norvegicusMutation(s): 0 
Gene Names: Stx1aSap
Find proteins for P32851 (Rattus norvegicus)
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Go to UniProtKB:  P32851
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
SNAP25C81Homo sapiensMutation(s): 0 
Gene Names: SNAP25SNAP
Find proteins for P60880 (Homo sapiens)
Explore P60880 
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PHAROS  P60880
Protein Feature View
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  • Reference Sequence
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
SNAP25D65Homo sapiensMutation(s): 0 
Gene Names: SNAP25SNAP
Find proteins for P60880 (Homo sapiens)
Explore P60880 
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PHAROS  P60880
Protein Feature View
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  • Reference Sequence
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
Complexin-1E63Homo sapiensMutation(s): 3 
Gene Names: CPLX1
Find proteins for O14810 (Homo sapiens)
Explore O14810 
Go to UniProtKB:  O14810
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PHAROS  O14810
Protein Feature View
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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

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-07-27
    Type: Initial release
  • Version 1.1: 2011-08-24
    Changes: Database references