5WLZ

Crystal Structure of Amino Acids 1677-1758 of Human Beta Cardiac Myosin Fused to Xrcc4


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.5 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.213 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Design considerations in coiled-coil fusion constructs for the structural determination of a problematic region of the human cardiac myosin rod.

Andreas, M.P.Ajay, G.Gellings, J.A.Rayment, I.

(2017) J. Struct. Biol. 200: 219-228

  • DOI: 10.1016/j.jsb.2017.07.006
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • X-ray structural determination of segments of the myosin rod has proved difficult because of the strong salt-dependent aggregation properties and repeating pattern of charges on the surface of the coiled-coil that lead to the formation of paracrystal ...

    X-ray structural determination of segments of the myosin rod has proved difficult because of the strong salt-dependent aggregation properties and repeating pattern of charges on the surface of the coiled-coil that lead to the formation of paracrystals. This problem has been resolved in part through the use of globular assembly domains that improve protein folding and prevent aggregation. The primary consideration now in designing coiled-coil fusion constructs for myosin is deciding where to truncate the coiled-coil and which amino acid residues to include from the folding domain. This is especially important for myosin that contains numerous regions of low predicted coiled-coil propensity. Here we describe the strategy adopted to determine the structure of the region that extends from Arg1677 - Leu1797 that included two areas that do not show a strong sequence signature of a conventional left-handed coiled coil or canonical heptad repeat. This demonstrates again that, with careful choice of fusion constructs, overlapping structures exhibit very similar conformations for the myosin rod fragments in the canonical regions. However, conformational variability is seen around Leu1706 which is a hot spot for cardiomyopathy mutations suggesting that this might be important for function.


    Organizational Affiliation

    Department of Biochemistry, University of Wisconsin-Madison, WI 53706, USA. Electronic address: ivan_rayment@biochem.wisc.edu.,Department of Biochemistry, University of Wisconsin-Madison, WI 53706, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
DNA repair protein XRCC4,Myosin-7
C, D, A, B
216Homo sapiensMutation(s): 9 
Gene Names: XRCC4, MYH7 (MYHCB)
Find proteins for Q13426 (Homo sapiens)
Go to Gene View: XRCC4
Go to UniProtKB:  Q13426
Find proteins for P12883 (Homo sapiens)
Go to Gene View: MYH7
Go to UniProtKB:  P12883
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.5 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.213 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 85.290α = 90.00
b = 102.940β = 90.00
c = 136.457γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data scaling
PHENIXrefinement
HKL-2000data reduction
PHASERphasing

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 Institute (NIH/NHLBI)United StatesR21 HL111237

Revision History 

  • Version 1.0: 2017-08-23
    Type: Initial release
  • Version 1.1: 2017-12-27
    Type: Database references
  • Version 1.2: 2019-12-04
    Type: Author supporting evidence