3HD7

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.40 Å
  • R-Value Free: 0.271 
  • R-Value Work: 0.239 
  • R-Value Observed: 0.241 

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Ligand Structure Quality Assessment 


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:  
    3IPD, 3HD7

  • 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-sensitive factor attachment protein receptor) family ...

    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
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Vesicle-associated membrane protein 2A, E91Rattus norvegicusMutation(s): 0 
Gene Names: Vamp2Syb2
Membrane Entity: Yes 
UniProt
Find proteins for P63045 (Rattus norvegicus)
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Go to UniProtKB:  P63045
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Syntaxin-1AB, F109Rattus norvegicusMutation(s): 0 
Gene Names: Stx1aSap
Membrane Entity: Yes 
UniProt
Find proteins for P32851 (Rattus norvegicus)
Explore P32851 
Go to UniProtKB:  P32851
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Synaptosomal-associated protein 25C, G80Rattus norvegicusMutation(s): 0 
Gene Names: Snap25Snap
Membrane Entity: Yes 
UniProt
Find proteins for P60881 (Rattus norvegicus)
Explore P60881 
Go to UniProtKB:  P60881
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  • Reference Sequence
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Synaptosomal-associated protein 25D, H68Rattus norvegicusMutation(s): 0 
Gene Names: Snap25Snap
Membrane Entity: Yes 
UniProt
Find proteins for P60881 (Rattus norvegicus)
Explore P60881 
Go to UniProtKB:  P60881
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.40 Å
  • R-Value Free: 0.271 
  • R-Value Work: 0.239 
  • R-Value Observed: 0.241 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 265.412α = 90
b = 135.49β = 96.34
c = 58.689γ = 90
Software Package:
Software NamePurpose
SHELXSphasing
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Ligand Structure Quality Assessment  



Entry History 

Deposition Data

Revision History  (Full details and data files)

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