3HD7

HELICAL EXTENSION OF THE NEURONAL SNARE COMPLEX INTO THE MEMBRANE, spacegroup C 1 2 1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.4 Å
  • R-Value Free: 0.271 
  • R-Value Work: 0.239 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Helical extension of the neuronal SNARE complex into the membrane

Stein, A.Weber, G.Wahl, M.C.Jahn, R.

(2009) Nature 460: 525-528

  • DOI: 10.1038/nature08156
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Neurotransmission relies on synaptic vesicles fusing with the membrane of nerve cells to release their neurotransmitter content into the synaptic cleft, a process requiring the assembly of several members of the SNARE (soluble N-ethylmaleimide-sensit ...

    Neurotransmission relies on synaptic vesicles fusing with the membrane of nerve cells to release their neurotransmitter content into the synaptic cleft, a process requiring the assembly of several members of the SNARE (soluble N-ethylmaleimide-sensitive factor attachment protein receptor) family. SNAREs represent an evolutionarily conserved protein family that mediates membrane fusion in the secretory and endocytic pathways of eukaryotic cells. On membrane contact, these proteins assemble in trans between the membranes as a bundle of four alpha-helices, with the energy released during assembly being thought to drive fusion. However, it is unclear how the energy is transferred to the membranes and whether assembly is conformationally linked to fusion. Here, we report the X-ray structure of the neuronal SNARE complex, consisting of rat syntaxin 1A, SNAP-25 and synaptobrevin 2, with the carboxy-terminal linkers and transmembrane regions at 3.4 A resolution. The structure shows that assembly proceeds beyond the already known core SNARE complex, resulting in a continuous helical bundle that is further stabilized by side-chain interactions in the linker region. Our results suggest that the final phase of SNARE assembly is directly coupled to membrane merger.


    Organizational Affiliation

    Department of Neurobiology, Max Planck Institute for Biophysical Chemistry, 37077 Göttingen, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Vesicle-associated membrane protein 2
A, E
91Rattus norvegicusMutation(s): 0 
Gene Names: Vamp2 (Syb2)
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
SNARE Protein Family
Protein: 
Syntaxin 1A/SNAP-25/Synaptobrevin-2 Complex with transmembrane regions
Find proteins for P63045 (Rattus norvegicus)
Go to UniProtKB:  P63045
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Syntaxin-1A
B, F
109Rattus norvegicusMutation(s): 0 
Gene Names: Stx1a (Sap)
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
SNARE Protein Family
Protein: 
Syntaxin 1A/SNAP-25/Synaptobrevin-2 Complex with transmembrane regions
Find proteins for P32851 (Rattus norvegicus)
Go to UniProtKB:  P32851
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Synaptosomal-associated protein 25
C, G
80Rattus norvegicusMutation(s): 0 
Gene Names: Snap25 (Snap)
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
SNARE Protein Family
Protein: 
Syntaxin 1A/SNAP-25/Synaptobrevin-2 Complex with transmembrane regions
Find proteins for P60881 (Rattus norvegicus)
Go to UniProtKB:  P60881
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
Synaptosomal-associated protein 25
D, H
68Rattus norvegicusMutation(s): 0 
Gene Names: Snap25 (Snap)
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
SNARE Protein Family
Protein: 
Syntaxin 1A/SNAP-25/Synaptobrevin-2 Complex with transmembrane regions
Find proteins for P60881 (Rattus norvegicus)
Go to UniProtKB:  P60881
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
C, D, E, F, H
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
GGG
Query on GGG

Download SDF File 
Download CCD File 
A, E
glycylglycylglycine
C6 H11 N3 O4
XKUKSGPZAADMRA-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.4 Å
  • R-Value Free: 0.271 
  • R-Value Work: 0.239 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 265.412α = 90.00
b = 135.490β = 96.34
c = 58.689γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
SHELXSphasing
HKL-2000data scaling
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-07-14
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Non-polymer description, Version format compliance