Crystal structure of the C1 domain of cardiac isoform of myosin binding protein-C at 1.3A

Experimental Data Snapshot

  • Resolution: 1.30 Å
  • R-Value Free: 0.209 
  • R-Value Observed: 0.164 

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This is version 1.3 of the entry. See complete history


An investigation into the protonation states of the C1 domain of cardiac myosin-binding protein C

Fisher, S.J.Helliwell, J.R.Khurshid, S.Govada, L.Redwood, C.Squire, J.M.Chayen, N.E.

(2008) Acta Crystallogr D Biol Crystallogr 64: 658-664

  • DOI: https://doi.org/10.1107/S0907444908008792
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Myosin-binding protein C (MyBP-C) is a myofibril-associated protein found in cardiac and skeletal muscle. The cardiac isoform (cMyBP-C) is subject to reversible phosphorylation and the surface-charge state of the protein is of keen interest with regard to understanding the inter-protein interactions that are implicated in its function. Diffraction data from the C1 domain of cMyBP-C were extended to 1.30 A resolution, where the of the diffraction data crosses 2.0, using intense synchrotron radiation. The protonation-state determinations were not above 2sigma (the best was 1.81sigma) and therefore an extrapolation is given, based on 100% data completeness and the average DPI, that a 3sigma determination could be possible if X-ray data could be measured to 1.02 A resolution. This might be possible via improved crystallization or multiple sample evaluation, e.g. using robotics or a yet more intense/collimated X-ray beam or combinations thereof. An alternative would be neutron protein crystallography at 2 A resolution, where it is estimated that for the unit-cell volume of the cMyBP-C C1 domain crystal a crystal volume of 0.10 mm3 would be needed with fully deuterated protein on LADI III. These efforts would optimally be combined in a joint X-ray and neutron model refinement.

  • Organizational Affiliation

    School of Chemistry, Brunswick Street, The University of Manchester, Manchester M13 9PL, England.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Myosin-binding protein C, cardiac-type108Homo sapiensMutation(s): 0 
Gene Names: MYBPC3
UniProt & NIH Common Fund Data Resources
Find proteins for Q14896 (Homo sapiens)
Explore Q14896 
Go to UniProtKB:  Q14896
PHAROS:  Q14896
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ14896
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.30 Å
  • R-Value Free: 0.209 
  • R-Value Observed: 0.164 
  • Space Group: I 41
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 48.848α = 90
b = 48.848β = 90
c = 95.132γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PDB_EXTRACTdata extraction
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-07-01
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2017-10-25
    Changes: Refinement description, Source and taxonomy
  • Version 1.3: 2023-08-30
    Changes: Data collection, Database references, Refinement description