2BKI

Myosin VI nucleotide-free (MDinsert2-IQ) crystal structure


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.304 
  • R-Value Work: 0.264 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

The Structure of the Myosin Vi Motor Reveals the Mechanism of Directionality Reversal

Menetrey, J.Bahloul, A.Wells, A.Yengo, C.Morris, C.Sweeney, H.L.Houdusse, A.

(2005) Nature 435: 779

  • DOI: 10.1038/nature03592
  • Primary Citation of Related Structures:  2BKH

  • PubMed Abstract: 
  • Here we solve a 2.4-A structure of a truncated version of the reverse-direction myosin motor, myosin VI, that contains the motor domain and binding sites for two calmodulin molecules. The structure reveals only minor differences in the motor domain f ...

    Here we solve a 2.4-A structure of a truncated version of the reverse-direction myosin motor, myosin VI, that contains the motor domain and binding sites for two calmodulin molecules. The structure reveals only minor differences in the motor domain from that in plus-end directed myosins, with the exception of two unique inserts. The first is near the nucleotide-binding pocket and alters the rates of nucleotide association and dissociation. The second unique insert forms an integral part of the myosin VI converter domain along with a calmodulin bound to a novel target motif within the insert. This serves to redirect the effective 'lever arm' of myosin VI, which includes a second calmodulin bound to an 'IQ motif', towards the pointed (minus) end of the actin filament. This repositioning largely accounts for the reverse directionality of this class of myosin motors. We propose a model incorporating a kinesin-like uncoupling/docking mechanism to provide a full explanation of the movements of myosin VI.


    Organizational Affiliation

    Structural Motility, Institut Curie CNRS, UMR144, 26 rue d'Ulm, 75248 Paris cedex 05, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
UNCONVENTIONAL MYOSIN
A
858Sus scrofaGene Names: MYO6
Find proteins for Q29122 (Sus scrofa)
Go to Gene View: MYO6
Go to UniProtKB:  Q29122
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
CALMODULIN
B, D
149Gallus gallusGene Names: CALM (CAM)
Find proteins for P62149 (Gallus gallus)
Go to UniProtKB:  P62149
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
CA
Query on CA

Download SDF File 
Download CCD File 
B
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.304 
  • R-Value Work: 0.264 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 104.781α = 90.00
b = 250.167β = 90.00
c = 67.274γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
AMoREphasing
SCALAdata scaling
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-06-07
    Type: Initial release
  • Version 1.1: 2015-09-16
    Type: Database references, Derived calculations, Non-polymer description, Other, Source and taxonomy, Structure summary, Version format compliance