5MZU

Crystal structure of the myosin chaperone UNC-45 from C. elegans (alternative conformation)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.8 Å
  • R-Value Free: 0.319 
  • R-Value Work: 0.298 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

UFD-2 is an adaptor-assisted E3 ligase targeting unfolded proteins.

Hellerschmied, D.Roessler, M.Lehner, A.Gazda, L.Stejskal, K.Imre, R.Mechtler, K.Dammermann, A.Clausen, T.

(2018) Nat Commun 9: 484-484

  • DOI: 10.1038/s41467-018-02924-7

  • PubMed Abstract: 
  • Muscle development requires the coordinated activities of specific protein folding and degradation factors. UFD-2, a U-box ubiquitin ligase, has been reported to play a central role in this orchestra regulating the myosin chaperone UNC-45. Here, we a ...

    Muscle development requires the coordinated activities of specific protein folding and degradation factors. UFD-2, a U-box ubiquitin ligase, has been reported to play a central role in this orchestra regulating the myosin chaperone UNC-45. Here, we apply an integrative in vitro and in vivo approach to delineate the substrate-targeting mechanism of UFD-2 and elucidate its distinct mechanistic features as an E3/E4 enzyme. Using Caenorhabditis elegans as model system, we demonstrate that UFD-2 is not regulating the protein levels of UNC-45 in muscle cells, but rather shows the characteristic properties of a bona fide E3 ligase involved in protein quality control. Our data demonstrate that UFD-2 preferentially targets unfolded protein segments. Moreover, the UNC-45 chaperone can serve as an adaptor protein of UFD-2 to poly-ubiquitinate unfolded myosin, pointing to a possible role of the UFD-2/UNC-45 pair in maintaining proteostasis in muscle cells.


    Related Citations: 
    • The myosin chaperone UNC-45 is organized in tandem modules to support myofilament formation in C. elegans.
      Gazda, L.,Pokrzywa, W.,Hellerschmied, D.,Loewe, T.,Forne, I.,Mueller-Planitz, F.,Hoppe, T.,Clausen, T.
      (2013) Cell 152: 183


    Organizational Affiliation

    Research Institute of Molecular Pathology (IMP), Vienna BioCenter (VBC), Campus-Vienna-Biocenter 1, 1030, Vienna, Austria.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
UNC-45
A
961Caenorhabditis elegansMutation(s): 0 
Gene Names: unc-45
Find proteins for G5EG62 (Caenorhabditis elegans)
Go to UniProtKB:  G5EG62
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.8 Å
  • R-Value Free: 0.319 
  • R-Value Work: 0.298 
  • Space Group: P 61 2 2
Unit Cell:
Length (Å)Angle (°)
a = 86.149α = 90.00
b = 86.149β = 90.00
c = 716.465γ = 120.00
Software Package:
Software NamePurpose
HKL-2000data reduction
PHENIXrefinement
PDB_EXTRACTdata extraction
PHASERphasing
SCALEPACKdata scaling
HKLdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Austrian Science FundAustriaP22750

Revision History 

  • Version 1.0: 2018-02-14
    Type: Initial release