4XA6

Crystal Structure of the coiled-coil surrounding Skip 4 of MYH7


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.42 Å
  • R-Value Free: 0.297 
  • R-Value Work: 0.239 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Skip residues modulate the structural properties of the myosin rod and guide thick filament assembly.

Taylor, K.C.Buvoli, M.Korkmaz, E.N.Buvoli, A.Zheng, Y.Heinze, N.T.Cui, Q.Leinwand, L.A.Rayment, I.

(2015) Proc.Natl.Acad.Sci.USA 112: E3806-E3815

  • DOI: 10.1073/pnas.1505813112
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The rod of sarcomeric myosins directs thick filament assembly and is characterized by the insertion of four skip residues that introduce discontinuities in the coiled-coil heptad repeats. We report here that the regions surrounding the first three sk ...

    The rod of sarcomeric myosins directs thick filament assembly and is characterized by the insertion of four skip residues that introduce discontinuities in the coiled-coil heptad repeats. We report here that the regions surrounding the first three skip residues share high structural similarity despite their low sequence homology. Near each of these skip residues, the coiled-coil transitions to a nonclose-packed structure inducing local relaxation of the superhelical pitch. Moreover, molecular dynamics suggest that these distorted regions can assume different conformationally stable states. In contrast, the last skip residue region constitutes a true molecular hinge, providing C-terminal rod flexibility. Assembly of myosin with mutated skip residues in cardiomyocytes shows that the functional importance of each skip residue is associated with rod position and reveals the unique role of the molecular hinge in promoting myosin antiparallel packing. By defining the biophysical properties of the rod, the structures and molecular dynamic calculations presented here provide insight into thick filament formation, and highlight the structural differences occurring between the coiled-coils of myosin and the stereotypical tropomyosin. In addition to extending our knowledge into the conformational and biological properties of coiled-coil discontinuities, the molecular characterization of the four myosin skip residues also provides a guide to modeling the effects of rod mutations causing cardiac and skeletal myopathies.


    Organizational Affiliation

    Department of Biochemistry, University of Wisconsin, Madison, WI 53706;




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Gp7-MYH7(1777-1855)-EB1 chimera protein
A, B, C, D
175Bacillus phage phi29Homo sapiens
This entity is chimeric
Mutation(s): 0 
Gene Names: 7, MAPRE1, MYH7 (MYHCB)
Find proteins for P13848 (Bacillus phage phi29)
Go to UniProtKB:  P13848
Find proteins for Q15691 (Homo sapiens)
Go to Gene View: MAPRE1
Go to UniProtKB:  Q15691
Find proteins for P12883 (Homo sapiens)
Go to Gene View: MYH7
Go to UniProtKB:  P12883
Small Molecules
Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, B, C, D
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
MLY
Query on MLY
A, B, C, D
L-PEPTIDE LINKINGC8 H18 N2 O2LYS
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.42 Å
  • R-Value Free: 0.297 
  • R-Value Work: 0.239 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 155.546α = 90.00
b = 46.889β = 94.50
c = 169.055γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-3000data reduction
PHENIXphasing
HKL-3000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Heart, Lung, and Blood InstituteUnited StatesHL111237

Revision History 

  • Version 1.0: 2015-07-01
    Type: Initial release
  • Version 1.1: 2015-07-15
    Type: Database references
  • Version 1.2: 2015-07-29
    Type: Database references
  • Version 1.3: 2017-09-27
    Type: Author supporting evidence, Database references, Derived calculations, Source and taxonomy