6BNV

CryoEM structure of MyosinVI-actin complex in the rigor (nucleotide-free) state, backbone-averaged with side chains truncated to alanine


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.6 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Cryo-EM structures reveal specialization at the myosin VI-actin interface and a mechanism of force sensitivity.

Gurel, P.S.Kim, L.Y.Ruijgrok, P.V.Omabegho, T.Bryant, Z.Alushin, G.M.

(2017) Elife 6: --

  • DOI: 10.7554/eLife.31125
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Despite extensive scrutiny of the myosin superfamily, the lack of high-resolution structures of actin-bound states has prevented a complete description of its mechanochemical cycle and limited insight into how sequence and structural diversification ...

    Despite extensive scrutiny of the myosin superfamily, the lack of high-resolution structures of actin-bound states has prevented a complete description of its mechanochemical cycle and limited insight into how sequence and structural diversification of the motor domain gives rise to specialized functional properties. Here we present cryo-EM structures of the unique minus-end directed myosin VI motor domain in rigor (4.6 Å) and Mg-ADP (5.5 Å) states bound to F-actin. Comparison to the myosin IIC-F-actin rigor complex reveals an almost complete lack of conservation of residues at the actin-myosin interface despite preservation of the primary sequence regions composing it, suggesting an evolutionary path for motor specialization. Additionally, analysis of the transition from ADP to rigor provides a structural rationale for force sensitivity in this step of the mechanochemical cycle. Finally, we observe reciprocal rearrangements in actin and myosin accompanying the transition between these states, supporting a role for actin structural plasticity during force generation by myosin VI.


    Related Citations: 
    • Controllable molecular motors engineered from myosin and RNA.
      Omabegho, T.,Gurel, P.S.,Cheng, C.Y.,Kim, L.Y.,Ruijgrok, P.V.,Das, R.,Alushin, G.M.,Bryant, Z.
      (2017) Nat Nanotechnol --: --


    Organizational Affiliation

    Laboratory of Structural Biophysics and Mechanobiology, The Rockefeller University, New York, United States.,Department of Structural Biology, Stanford University, Stanford, United States.,Department of Bioengineering, Stanford University, Stanford, United States.,Cell Biology and Physiology Center, National Heart, Blood, and Lung Institute, National Institutes of Health, Bethesda, United States.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Unconventional myosin-VI
I, J, K, L, M, N
816Sus scrofaMutation(s): 0 
Gene Names: MYO6
Find proteins for Q29122 (Sus scrofa)
Go to Gene View: MYO6
Go to UniProtKB:  Q29122
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Actin, alpha skeletal muscle
A, B, C, D, E, F, G, H
373Oryctolagus cuniculusMutation(s): 0 
Gene Names: ACTA1 (ACTA)
Find proteins for P68135 (Oryctolagus cuniculus)
Go to Gene View: ACTA1
Go to UniProtKB:  P68135
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Calmodulin
O, P, Q, R, S, T
145Gallus gallusMutation(s): 0 
Gene Names: CALM (CAM)
Find proteins for P62149 (Gallus gallus)
Go to UniProtKB:  P62149
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.6 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/Office of the DirectorUnited States5DP5OD017885

Revision History 

  • Version 1.0: 2018-01-10
    Type: Initial release
  • Version 1.1: 2018-01-17
    Type: Author supporting evidence