3BAS

Crystal structure of the N-terminal region of the scallop myosin rod, monoclinic (C2) form


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.246 
  • R-Value Observed: 0.246 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

An unstable head-rod junction may promote folding into the compact off-state conformation of regulated myosins.

Brown, J.H.Yang, Y.Reshetnikova, L.Gourinath, S.Suveges, D.Kardos, J.Hobor, F.Reutzel, R.Nyitray, L.Cohen, C.

(2008) J Mol Biol 375: 1434-1443

  • DOI: 10.1016/j.jmb.2007.11.071
  • Primary Citation of Related Structures:  
    3BAS, 3BAT

  • PubMed Abstract: 
  • The N-terminal region of myosin's rod-like subfragment 2 (S2) joins the two heads of this dimeric molecule and is key to its function. Previously, a crystal structure of this predominantly coiled-coil region was determined for a short fragment (51 residues plus a leucine zipper) of the scallop striated muscle myosin isoform ...

    The N-terminal region of myosin's rod-like subfragment 2 (S2) joins the two heads of this dimeric molecule and is key to its function. Previously, a crystal structure of this predominantly coiled-coil region was determined for a short fragment (51 residues plus a leucine zipper) of the scallop striated muscle myosin isoform. In that study, the N-terminal 10-14 residues were found to be disordered. We have now determined the structure of the same scallop peptide in three additional crystal environments. In each of two of these structures, improved order has allowed visualization of the entire N-terminus in one chain of the dimeric peptide. We have also compared the melting temperatures of this scallop S2 peptide with those of analogous peptides from three other isoforms. Taken together, these experiments, along with examination of sequences, point to a diminished stability of the N-terminal region of S2 in regulated myosins, compared with those myosins whose regulation is thin filament linked. It seems plain that this isoform-specific instability promotes the off-state conformation of the heads in regulated myosins. We also discuss how myosin isoforms with varied thermal stabilities share the basic capacity to transmit force efficiently in order to produce contraction in their on states.


    Related Citations: 
    • Visualization of an unstable coiled coil from the scallop myosin rod.
      Li, Y., Brown, J.H., Reshetnikova, L., Blazsek, A., Farkas, L., Nyitray, L., Cohen, C.
      (2003) Nature 424: 341
    • Crystal structures of human cardiac beta-myosin II S2-Delta provide insight into the functional role of the S2 subfragment.
      Blankenfeldt, W., Thoma, N.H., Wray, J.S., Gautel, M., Schlichting, I.
      (2006) Proc Natl Acad Sci U S A 103: 17713

    Organizational Affiliation

    Rosenstiel Basic Medical Sciences Research Center, Brandeis University, Waltham, MA 02454-9110, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Myosin heavy chain, striated muscle/General control protein GCN4 chimeraA, B89Argopecten irradiansSaccharomyces cerevisiae
This entity is chimeric
Mutation(s): 0 
Gene Names: -/GCN4AAS3ARG9YEL009C
UniProt
Find proteins for P03069 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P03069 
Go to UniProtKB:  P03069
Find proteins for P24733 (Argopecten irradians)
Explore P24733 
Go to UniProtKB:  P24733
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
IOD
Query on IOD

Download Ideal Coordinates CCD File 
C [auth B]IODIDE ION
I
XMBWDFGMSWQBCA-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.246 
  • R-Value Observed: 0.246 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 123.335α = 90
b = 44.912β = 95.18
c = 39.878γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
CNSrefinement
PDB_EXTRACTdata extraction
AMoREphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

  • Deposited Date: 2007-11-08 
  • Released Date: 2008-01-08 
  • Deposition Author(s): Brown, J.H., Cohen, C.

Revision History  (Full details and data files)

  • Version 1.0: 2008-01-08
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2017-08-02
    Changes: Source and taxonomy
  • Version 1.3: 2017-10-25
    Changes: Refinement description