2V26

Myosin VI (MD) pre-powerstroke state (Mg.ADP.VO4)

• PDB DOI: https://doi.org/10.2210/pdb2V26/pdb

• Classification: STRUCTURAL PROTEIN
• Organism(s): Sus scrofa
• Expression System: Spodoptera frugiperda
• Mutation(s): No 


• Deposited: 2007-06-03 Released: 2007-11-20 
• Deposition Author(s): Menetrey, J., Llinas, P., Mukherjea, M., Sweeney, H.L., Houdusse, A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.75 Å
• R-Value Free: 0.227 
• R-Value Work: 0.202 
• R-Value Observed: 0.205 

Literature

The Structural Basis for the Large Powerstroke of Myosin Vi.

Menetrey, J., Llinas, P., Mukherjea, M., Sweeney, H.L., Houdusse, A.

(2007) Cell 131: 300

• PubMed: 17956731 
• DOI: https://doi.org/10.1016/j.cell.2007.08.027
• Primary Citation of Related Structures:  
  2V26


• PubMed Abstract: 
  

  Due to a unique addition to the lever arm-positioning region (converter), class VI myosins move in the opposite direction (toward the minus-end of actin filaments) compared to other characterized myosin classes. However, the large size of the myosin VI lever arm swing (powerstroke) cannot be explained by our current view of the structural transitions that occur within the myosin motor. We have solved the crystal structure of a fragment of the myosin VI motor in the structural state that represents the starting point for movement on actin; the pre-powerstroke state. Unexpectedly, the converter itself rearranges to achieve a conformation that has not been seen for other myosins. This results in a much larger powerstroke than is achievable without the converter rearrangement. Moreover, it provides a new mechanism that could be exploited to increase the powerstroke of yet to be characterized plus-end-directed myosin classes.

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Organizational Affiliation: 

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

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors and generated by PQS (software)

Macromolecule Content

• Total Structure Weight: 90.63 kDa 
• Atom Count: 6,665 
• Modelled Residue Count: 747 
• Deposited Residue Count: 784 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
MYOSIN VI	A	784	Sus scrofa	Mutation(s): 0
UniProt
Find proteins for Q29122 (Sus scrofa) Explore Q29122  Go to UniProtKB:  Q29122

Small Molecules

Ligands 5 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ADP	B [auth A]	ADENOSINE-5'-DIPHOSPHATE C10 H15 N5 O10 P2 XTWYTFMLZFPYCI-KQYNXXCUSA-N
VO4	C [auth A]	VANADATE ION O4 V LSGOVYNHVSXFFJ-UHFFFAOYSA-N
SO4	K [auth A], L [auth A]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
EDO	D [auth A], E [auth A], F [auth A], G [auth A], H [auth A], I [auth A], J [auth A]	1,2-ETHANEDIOL C2 H6 O2 LYCAIKOWRPUZTN-UHFFFAOYSA-N
MG	M [auth A]	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.75 Å
• R-Value Free: 0.227 
• R-Value Work: 0.202 
• R-Value Observed: 0.205 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 93.512	α = 90
b = 93.845	β = 90
c = 100.976	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
MOSFLM	data reduction
SCALA	data scaling
AMoRE	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2007-11-20 
Deposition Author(s): Menetrey, J., Llinas, P., Mukherjea, M., Sweeney, H.L., Houdusse, A.

Revision History  

• Version 1.0: 2007-11-20
  Type: Initial release
  
• Version 1.1: 2011-05-08
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2023-12-13
  Changes: Data collection, Database references, Derived calculations, Other, Refinement description