2IX7

Structure of apo-calmodulin bound to unconventional myosin V


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.216 
  • R-Value Observed: 0.216 

wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

Crystal Structure of Apo-Calmodulin Bound to the First Two Iq Motifs of Myosin V Reveals Essential Recognition Features.

Houdusse, A.Gaucher, J.F.Krementsova, E.Mui, S.Trybus, K.M.Cohen, C.

(2006) Proc Natl Acad Sci U S A 103: 19326

  • DOI: https://doi.org/10.1073/pnas.0609436103
  • Primary Citation of Related Structures:  
    2IX7

  • PubMed Abstract: 

    A 2.5-A resolution structure of calcium-free calmodulin (CaM) bound to the first two IQ motifs of the murine myosin V heavy chain reveals an unusual CaM conformation. The C-terminal lobe of each CaM adopts a semi-open conformation that grips the first part of the IQ motif (IQxxxR), whereas the N-terminal lobe adopts a closed conformation that interacts more weakly with the second part of the motif (GxxxR). Variable residues in the IQ motif play a critical role in determining the precise structure of the bound CaM, such that even the consensus residues of different motifs show unique interactions with CaM. This complex serves as a model for the lever arm region of many classes of unconventional myosins, as well as other IQ motif-containing proteins such as neuromodulin and IQGAPs.


  • Organizational Affiliation

    Motilité Structurale, Institut Curie, Centre National de la Recherche Scientifique, Unite Mixté de Recherche 144, 26 rue d'Ulm, 75248, Paris Cedex 05, France.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
CALMODULIN
A, B
145Mus musculusMutation(s): 0 
UniProt
Find proteins for P0DP26 (Mus musculus)
Explore P0DP26 
Go to UniProtKB:  P0DP26
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0DP26
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
MYOSIN-5A58Mus musculusMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for Q99104 (Mus musculus)
Explore Q99104 
Go to UniProtKB:  Q99104
IMPC:  MGI:105976
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ99104
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.216 
  • R-Value Observed: 0.216 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 112α = 90
b = 112β = 90
c = 102.34γ = 120
Software Package:
Software NamePurpose
CNSrefinement
MOSFLMdata reduction
SCALEPACKdata scaling
MLPHAREphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2006-12-13
    Type: Initial release
  • Version 1.1: 2013-12-04
    Changes: Data collection, Derived calculations, Non-polymer description, Other, Refinement description, Source and taxonomy, Version format compliance
  • Version 1.2: 2019-02-27
    Changes: Data collection, Derived calculations, Experimental preparation, Other
  • Version 1.3: 2023-11-08
    Changes: Data collection, Database references, Derived calculations, Other
  • Version 1.4: 2023-12-13
    Changes: Refinement description