2NPS

Crystal Structure of the Early Endosomal SNARE Complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.247 
  • R-Value Observed: 0.251 

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
  • Primary Citation of Related Structures:  
    2NPS

  • 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
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Vesicle-associated membrane protein 4A74Mus musculusMutation(s): 0 
Gene Names: Vamp4_predictedVamp4
Find proteins for O70480 (Mus musculus)
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Go to UniProtKB:  O70480
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Syntaxin 13B71Rattus norvegicusMutation(s): 0 
Gene Names: syntaxin 13Stx12Stx13
Find proteins for G3V7P1 (Rattus norvegicus)
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Go to UniProtKB:  G3V7P1
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Vesicle transport through interaction with t-SNAREs homolog 1AC81Rattus norvegicusMutation(s): 0 
Gene Names: Vti1aVti1l2
Find proteins for Q9JI51 (Rattus norvegicus)
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Go to UniProtKB:  Q9JI51
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  • Reference Sequence
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Syntaxin-6D82Homo sapiensMutation(s): 0 
Gene Names: STX6
Find proteins for O43752 (Homo sapiens)
Explore O43752 
Go to UniProtKB:  O43752
NIH Common Fund Data Resources
PHAROS  O43752
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.247 
  • R-Value Observed: 0.251 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 252.882α = 90
b = 28.657β = 98.25
c = 41.887γ = 90
Software Package:
Software NamePurpose
MAR345dtbdata collection
MOLREPphasing
CNSrefinement
MAR345data collection
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History 

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