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 ...

    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 2AE37Homo sapiensMutation(s): 0 
Gene Names: VAMP2SYB2
Find proteins for P63027 (Homo sapiens)
Explore P63027 
Go to UniProtKB:  P63027
NIH Common Fund Data Resources
PHAROS  P63027
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Syntaxin-1ABF65Rattus norvegicusMutation(s): 0 
Gene Names: Stx1aSap
Find proteins for P32851 (Rattus norvegicus)
Explore P32851 
Go to UniProtKB:  P32851
Protein Feature View
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Synaptosomal-associated protein 25CG81Homo sapiensMutation(s): 0 
Gene Names: SNAP25SNAP
Find proteins for P60880 (Homo sapiens)
Explore P60880 
Go to UniProtKB:  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
Synaptosomal-associated protein 25DH65Homo sapiensMutation(s): 0 
Gene Names: SNAP25SNAP
Find proteins for P60880 (Homo sapiens)
Explore P60880 
Go to UniProtKB:  P60880
NIH Common Fund Data Resources
PHAROS  P60880
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download CCD File 
B, C
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
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 

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