3RK2

Truncated SNARE complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.227 

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:  

  • 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

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Vesicle-associated membrane protein 2
A, E
37Homo sapiensMutation(s): 0 
Gene Names: VAMP2 (SYB2)
Find proteins for P63027 (Homo sapiens)
Go to Gene View: VAMP2
Go to UniProtKB:  P63027
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Syntaxin-1A
B, F
65Rattus norvegicusMutation(s): 0 
Gene Names: Stx1a (Sap)
Find proteins for P32851 (Rattus norvegicus)
Go to UniProtKB:  P32851
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Synaptosomal-associated protein 25
C, G
81Homo sapiensMutation(s): 0 
Gene Names: SNAP25 (SNAP)
Find proteins for P60880 (Homo sapiens)
Go to Gene View: SNAP25
Go to UniProtKB:  P60880
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
Synaptosomal-associated protein 25
D, H
65Homo sapiensMutation(s): 0 
Gene Names: SNAP25 (SNAP)
Find proteins for P60880 (Homo sapiens)
Go to Gene View: SNAP25
Go to UniProtKB:  P60880
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download SDF File 
Download CCD File 
B, C
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.227 
  • 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
REFMACrefinement
HKL-2000data reduction
SCALEPACKdata scaling
HKL-2000data collection
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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