5UE8

The crystal structure of Munc13-1 C1C2BMUN domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.35 Å
  • R-Value Free: 0.290 
  • R-Value Work: 0.252 
  • R-Value Observed: 0.254 

wwPDB Validation   3D Report Full Report


This is version 2.1 of the entry. See complete history


Literature

Mechanistic insights into neurotransmitter release and presynaptic plasticity from the crystal structure of Munc13-1 C1C2BMUN.

Xu, J.Camacho, M.Xu, Y.Esser, V.Liu, X.Trimbuch, T.Pan, Y.Z.Ma, C.Tomchick, D.R.Rosenmund, C.Rizo, J.

(2017) Elife 6

  • DOI: 10.7554/eLife.22567
  • Primary Citation of Related Structures:  
    5UE8, 5UF7

  • PubMed Abstract: 
  • Munc13-1 acts as a master regulator of neurotransmitter release, mediating docking-priming of synaptic vesicles and diverse presynaptic plasticity processes. It is unclear how the functions of the multiple domains of Munc13-1 are coordinated. The crystal structure of a Munc13-1 fragment including its C 1 , C 2 B and MUN domains (C 1 C 2 BMUN) reveals a 19 ...

    Munc13-1 acts as a master regulator of neurotransmitter release, mediating docking-priming of synaptic vesicles and diverse presynaptic plasticity processes. It is unclear how the functions of the multiple domains of Munc13-1 are coordinated. The crystal structure of a Munc13-1 fragment including its C 1 , C 2 B and MUN domains (C 1 C 2 BMUN) reveals a 19.5 nm-long multi-helical structure with the C 1 and C 2 B domains packed at one end. The similar orientations of the respective diacyglycerol- and Ca 2+ -binding sites of the C 1 and C 2 B domains suggest that the two domains cooperate in plasma-membrane binding and that activation of Munc13-1 by Ca 2+ and diacylglycerol during short-term presynaptic plasticity are closely interrelated. Electrophysiological experiments in mouse neurons support the functional importance of the domain interfaces observed in C 1 C 2 BMUN. The structure imposes key constraints for models of neurotransmitter release and suggests that Munc13-1 bridges the vesicle and plasma membranes from the periphery of the membrane-membrane interface.


    Related Citations: 
    • Functional synergy between the Munc13 C-terminal C1 and C2 domains.
      Liu, X., Seven, A.B., Camacho, M., Esser, V., Xu, J., Trimbuch, T., Quade, B., Su, L., Ma, C., Rosenmund, C., Rizo, J.
      (2016) Elife 5: --
    • Syntaxin opening by the MUN domain underlies the function of Munc13 in synaptic-vesicle priming.
      Yang, X., Wang, S., Sheng, Y., Zhang, M., Zou, W., Wu, L., Kang, L., Rizo, J., Zhang, R., Xu, T., Ma, C.
      (2015) Nat Struct Mol Biol 22: 547
    • The Crystal Structure of a Munc13 C-terminal Module Exhibits a Remarkable Similarity to Vesicle Tethering Factors
      Li, W., Ma, C., Guan, R., Xu, Y., Tomchick, D.R., Rizo, J.
      (2011) Structure 19: 1443

    Organizational Affiliation

    Department of Pharmacology, University of Texas Southwestern Medical Center, Dallas, United States.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Protein unc-13 homolog AA, B961Rattus norvegicusMutation(s): 1 
Gene Names: Unc13aUnc13h1
UniProt
Find proteins for Q62768 (Rattus norvegicus)
Explore Q62768 
Go to UniProtKB:  Q62768
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ62768
Protein Feature View
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.35 Å
  • R-Value Free: 0.290 
  • R-Value Work: 0.252 
  • R-Value Observed: 0.254 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 176.145α = 90
b = 86.351β = 115.54
c = 202.142γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-3000data scaling
PHASERphasing
PDB_EXTRACTdata extraction
HKL-3000data reduction
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2017-02-15
    Type: Initial release
  • Version 1.1: 2017-11-22
    Changes: Refinement description
  • Version 2.0: 2018-02-21
    Changes: Database references, Polymer sequence
  • Version 2.1: 2018-03-28
    Changes: Data collection, Database references