2NPS

Crystal Structure of the Early Endosomal SNARE Complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.247 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Early endosomal SNAREs form a structurally conserved SNARE complex and fuse liposomes with multiple topologies

Zwilling, D.Cypionka, A.Pohl, W.H.Fasshauer, D.Walla, P.J.Wahl, M.C.Jahn, R.

(2007) Embo J. 26: 9-18

  • DOI: 10.1038/sj.emboj.7601467

  • PubMed Abstract: 
  • SNARE proteins mediate membrane fusion in eukaryotic cells. They contain conserved SNARE motifs that are usually located adjacent to a C-terminal transmembrane domain. SNARE motifs spontaneously assemble into four helix bundles, with each helix belon ...

    SNARE proteins mediate membrane fusion in eukaryotic cells. They contain conserved SNARE motifs that are usually located adjacent to a C-terminal transmembrane domain. SNARE motifs spontaneously assemble into four helix bundles, with each helix belonging to a different subfamily. Liposomes containing SNAREs spontaneously fuse with each other, but it is debated how the SNAREs are distributed between the membranes. Here, we report that the SNAREs mediating homotypic fusion of early endosomes fuse liposomes in five out of seven possible combinations, in contrast to previously studied SNAREs involved in heterotypic fusion events. The crystal structure of the early endosomal SNARE complex resembles that of the neuronal and late endosomal complexes, but differs in surface side-chain interactions. We conclude that homotypic fusion reactions may proceed with multiple SNARE topologies, suggesting that the conserved SNARE structure allows for flexibility in the initial interactions needed for fusion.


    Organizational Affiliation

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




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Vesicle-associated membrane protein 4
A
74Mus musculusMutation(s): 0 
Gene Names: Vamp4
Find proteins for O70480 (Mus musculus)
Go to UniProtKB:  O70480
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Syntaxin 13
B
71Rattus norvegicusMutation(s): 0 
Gene Names: Stx12 (Stx13)
Find proteins for G3V7P1 (Rattus norvegicus)
Go to UniProtKB:  G3V7P1
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Vesicle transport through interaction with t-SNAREs homolog 1A
C
81Rattus norvegicusMutation(s): 0 
Gene Names: Vti1a (Vti1l2)
Find proteins for Q9JI51 (Rattus norvegicus)
Go to UniProtKB:  Q9JI51
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
Syntaxin-6
D
82Homo sapiensMutation(s): 0 
Gene Names: STX6
Find proteins for O43752 (Homo sapiens)
Go to Gene View: STX6
Go to UniProtKB:  O43752
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.247 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 252.882α = 90.00
b = 28.657β = 98.25
c = 41.887γ = 90.00
Software Package:
Software NamePurpose
MOLREPphasing
CNSrefinement
SCALEPACKdata scaling
MAR345data collection
MAR345dtbdata collection
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-12-26
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-10-18
    Type: Advisory, Refinement description