2IX7

Structure of apo-calmodulin bound to unconventional myosin V


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.216 

wwPDB Validation 3D Report Full Report


This is version 1.2 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.USA 103: 19326

  • DOI: 10.1073/pnas.0609436103

  • 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 firs ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CALMODULIN
A, B
145Mus musculusMutation(s): 0 
Gene Names: Calm1 (Calm, Cam, Cam1)
Find proteins for P0DP26 (Mus musculus)
Go to UniProtKB:  P0DP26
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
MYOSIN-5A
C
58Mus musculusMutation(s): 0 
Gene Names: Myo5a (Dilute)
Find proteins for Q99104 (Mus musculus)
Go to UniProtKB:  Q99104
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
B, C
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
CYS
Query on CYS

Download SDF File 
Download CCD File 
C
CYSTEINE
C3 H7 N O2 S
XUJNEKJLAYXESH-REOHCLBHSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.216 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 112.000α = 90.00
b = 112.000β = 90.00
c = 102.340γ = 120.00
Software Package:
Software NamePurpose
MLPHAREphasing
MOSFLMdata reduction
CNSrefinement
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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