4R8G

Crystal Structure of Myosin-1c tail in complex with Calmodulin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.50 Å
  • R-Value Free: 0.304 
  • R-Value Work: 0.242 
  • R-Value Observed: 0.245 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structure of myosin-1c tail bound to calmodulin provides insights into calcium-mediated conformational coupling.

Lu, Q.Li, J.Ye, F.Zhang, M.

(2015) Nat Struct Mol Biol 22: 81-88

  • DOI: 10.1038/nsmb.2923
  • Primary Citation of Related Structures:  
    4R8G

  • PubMed Abstract: 
  • Class I myosins can sense cellular mechanical forces and function as tension-sensitive anchors or transporters. How mechanical load is transduced from the membrane-binding tail to the force-generating head in myosin-1 is unknown. Here we determined the crystal structure of the entire tail of mouse myosin-1c in complex with apocalmodulin, showing that myosin-1c adopts a stable monomer conformation suited for force transduction ...

    Class I myosins can sense cellular mechanical forces and function as tension-sensitive anchors or transporters. How mechanical load is transduced from the membrane-binding tail to the force-generating head in myosin-1 is unknown. Here we determined the crystal structure of the entire tail of mouse myosin-1c in complex with apocalmodulin, showing that myosin-1c adopts a stable monomer conformation suited for force transduction. The lever-arm helix and the C-terminal extended PH domain of the motor are coupled by a stable post-IQ domain bound to calmodulin in a highly unusual mode. Ca(2+) binding to calmodulin induces major conformational changes in both IQ motifs and the post-IQ domain and increases flexibility of the myosin-1c tail. Our study provides a structural blueprint for the neck and tail domains of myosin-1 and expands the target binding modes of the master Ca(2+)-signal regulator calmodulin.


    Organizational Affiliation

    1] Division of Life Science, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China. [2] Center of Systems Biology and Human Health, School of Science and Institute for Advanced Study, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China. [3] State Key Laboratory of Molecular Neuroscience, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Unconventional myosin-IcA [auth E]335Mus musculusMutation(s): 0 
Gene Names: Myo1c
Find proteins for Q9WTI7 (Mus musculus)
Explore Q9WTI7 
Go to UniProtKB:  Q9WTI7
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
CalmodulinC [auth A], B, D [auth H]148Xenopus laevisMutation(s): 0 
Gene Names: calm1calm2
Find proteins for P0DP33 (Xenopus laevis)
Explore P0DP33 
Go to UniProtKB:  P0DP33
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download Ideal Coordinates CCD File 
E, F [auth E], G [auth E]SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.50 Å
  • R-Value Free: 0.304 
  • R-Value Work: 0.242 
  • R-Value Observed: 0.245 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 105.447α = 90
b = 105.447β = 90
c = 288.068γ = 90
Software Package:
Software NamePurpose
SHARPphasing
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-12-03
    Type: Initial release
  • Version 1.1: 2019-12-18
    Changes: Database references