4I2Z

Crystal structure of the myosin chaperone UNC-45 from C.elegans in complex with a Hsp90 peptide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.237 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

The myosin chaperone UNC-45 is organized in tandem modules to support myofilament formation in C. elegans.

Gazda, L.Pokrzywa, W.Hellerschmied, D.Lowe, T.Forne, I.Mueller-Planitz, F.Hoppe, T.Clausen, T.

(2013) Cell 152: 183-195

  • DOI: 10.1016/j.cell.2012.12.025
  • Primary Citation of Related Structures:  
  • Also Cited By: 5MZU

  • PubMed Abstract: 
  • The UCS (UNC-45/CRO1/She4) chaperones play an evolutionarily conserved role in promoting myosin-dependent processes, including cytokinesis, endocytosis, RNA transport, and muscle development. To investigate the protein machinery orchestrating myosin ...

    The UCS (UNC-45/CRO1/She4) chaperones play an evolutionarily conserved role in promoting myosin-dependent processes, including cytokinesis, endocytosis, RNA transport, and muscle development. To investigate the protein machinery orchestrating myosin folding and assembly, we performed a comprehensive analysis of Caenorhabditis elegans UNC-45. Our structural and biochemical data demonstrate that UNC-45 forms linear protein chains that offer multiple binding sites for cooperating chaperones and client proteins. Accordingly, Hsp70 and Hsp90, which bind to the TPR domain of UNC-45, could act in concert and with defined periodicity on captured myosin molecules. In vivo analyses reveal the elongated canyon of the UCS domain as a myosin-binding site and show that multimeric UNC-45 chains support organization of sarcomeric repeats. In fact, expression of transgenes blocking UNC-45 chain formation induces dominant-negative defects in the sarcomere structure and function of wild-type worms. Together, these findings uncover a filament assembly factor that directly couples myosin folding with myofilament formation.


    Organizational Affiliation

    Research Institute of Molecular Pathology, Dr. Bohrgasse 7, 1030 Vienna, Austria.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Protein UNC-45
A
961Caenorhabditis elegansMutation(s): 0 
Gene Names: unc-45
Find proteins for G5EG62 (Caenorhabditis elegans)
Go to UniProtKB:  G5EG62
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Heat shock protein 90
B
10Caenorhabditis elegansMutation(s): 0 
Gene Names: daf-21
Find proteins for Q18688 (Caenorhabditis elegans)
Go to UniProtKB:  Q18688
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: 2.9 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.237 
  • Space Group: P 61 2 2
Unit Cell:
Length (Å)Angle (°)
a = 86.633α = 90.00
b = 86.633β = 90.00
c = 815.015γ = 120.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
SHARPphasing
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-03-13
    Type: Initial release