6A30

Crystal Structure of Munc13-1 MUN Domain and Synaptobrevin-2 Juxtamembrane Linker Region


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.79 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.209 

wwPDB Validation   3D Report Full Report


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Literature

Munc18 and Munc13 serve as a functional template to orchestrate neuronal SNARE complex assembly.

Wang, S.Li, Y.Gong, J.H.Ye, S.Yang, X.F.Zhang, R.G.Ma, C.

(2019) Nat Commun 10: 69-69

  • DOI: 10.1038/s41467-018-08028-6
  • Primary Citation of Related Structures:  
    6A30

  • PubMed Abstract: 
  • The transition of the Munc18-1/syntaxin-1 complex to the SNARE complex, a key step involved in exocytosis, is regulated by Munc13-1, SNAP-25 and synaptobrevin-2, but the underlying mechanism remains elusive. Here, we identify an interaction between Munc13-1 and the membrane-proximal linker region of synaptobrevin-2, and reveal its essential role in transition and exocytosis ...

    The transition of the Munc18-1/syntaxin-1 complex to the SNARE complex, a key step involved in exocytosis, is regulated by Munc13-1, SNAP-25 and synaptobrevin-2, but the underlying mechanism remains elusive. Here, we identify an interaction between Munc13-1 and the membrane-proximal linker region of synaptobrevin-2, and reveal its essential role in transition and exocytosis. Upon this interaction, Munc13-1 not only recruits synaptobrevin-2-embedded vesicles to the target membrane but also renders the synaptobrevin-2 SNARE motif more accessible to the Munc18-1/syntaxin-1 complex. Afterward, the entry of SNAP-25 leads to a half-zippered SNARE assembly, which eventually dissociates the Munc18-1/syntaxin-1 complex to complete SNARE complex formation. Our data suggest that Munc18-1 and Munc13-1 together serve as a functional template to orchestrate SNARE complex assembly.


    Organizational Affiliation

    Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, and the Collaborative Innovation Center for Brain Science, Huazhong University of Science and Technology, 430074, Wuhan, China. cong.ma@hust.edu.cn.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Protein unc-13 homolog AA537Rattus norvegicusMutation(s): 0 
Gene Names: Unc13aUnc13h1
UniProt
Find proteins for Q62768 (Rattus norvegicus)
Explore Q62768 
Go to UniProtKB:  Q62768
Protein Feature View
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  • Reference Sequence
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Synaptobrevin-2 juxtamembrane linker peptideB [auth P]6Rattus norvegicusMutation(s): 0 
Gene Names: Vamp2Syb2
UniProt
Find proteins for P63045 (Rattus norvegicus)
Explore P63045 
Go to UniProtKB:  P63045
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.79 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.209 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 114.481α = 90
b = 270.967β = 90
c = 47.915γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
PDB_EXTRACTdata extraction
HKL-2000data reduction
SCALAdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Natural Science Foundation of ChinaChina31670846
National Natural Science Foundation of ChinaChina31670850
National Natural Science Foundation of ChinaChina31721002
National Basic Research Program of China(973 Program)China2015CB910800

Revision History  (Full details and data files)

  • Version 1.0: 2019-01-30
    Type: Initial release