1DFK

NUCLEOTIDE-FREE SCALLOP MYOSIN S1-NEAR RIGOR STATE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.2 Å
  • R-Value Free: 0.410 
  • R-Value Work: 0.415 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Three conformational states of scallop myosin S1.

Houdusse, A.Szent-Gyorgyi, A.G.Cohen, C.

(2000) Proc.Natl.Acad.Sci.USA 97: 11238-11243

  • DOI: 10.1073/pnas.200376897
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • We have determined the structure of the intact scallop myosin head, containing both the motor domain and the lever arm, in the nucleotide-free state and in the presence of MgADP.V04, corresponding to the transition state. These two new structures, to ...

    We have determined the structure of the intact scallop myosin head, containing both the motor domain and the lever arm, in the nucleotide-free state and in the presence of MgADP.V04, corresponding to the transition state. These two new structures, together with the previously determined structure of scallop S1 complexed with MgADP (which we interpret as a detached ATP state), reveal three conformations of an intact S1 obtained from a single isoform. These studies, together with new crystallization results, show how the conformation of the motor depends on the nucleotide content of the active site. The resolution of the two new structures ( approximately 4 A) is sufficient to establish the relative positions of the subdomains and the overall conformation of the joints within the motor domain as well as the position of the lever arm. Comparison of available crystal structures from different myosin isoforms and truncated constructs in either the nucleotide-free or transition states indicates that the major features within the motor domain are relatively invariant in both these states. In contrast, the position of the lever arm varies significantly between different isoforms. These results indicate that the heavy-chain helix is pliant at the junction between the converter and the lever arm and that factors other than the precise position of the converter can influence the position of the lever arm. It is possible that this pliant junction in the myosin head contributes to the compliance known to be present in the crossbridge.


    Related Citations: 
    • Structure of the regulatory domain of scallop myosin at 2 A resolution: implications for regulation.
      Houdusse, A.,Cohen, C.
      (1996) Structure 4: 21
    • Atomic structure of scallop myosin subfragment S1 complexed with MgADP: a novel conformation of the myosin head.
      Houdusse, A.,Kalabokis, V.N.,Himmel, D.,Szent-Gyorgyi, A.G.,Cohen, C.
      (1999) Cell 97: 459


    Organizational Affiliation

    Rosenstiel Basic Medical Sciences Research Center, and Biology Department, Brandeis University, Waltham, MA 02254-9110, USA. Anne.Houdusse@curie.fr




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
MYOSIN HEAD
A
830Argopecten irradiansMutation(s): 0 
Find proteins for P24733 (Argopecten irradians)
Go to UniProtKB:  P24733
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
MYOSIN HEAD
Y
139Argopecten irradiansMutation(s): 0 
Find proteins for P13543 (Argopecten irradians)
Go to UniProtKB:  P13543
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
MYOSIN HEAD
Z
152Argopecten irradiansMutation(s): 0 
Find proteins for P07291 (Argopecten irradians)
Go to UniProtKB:  P07291
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download SDF File 
Download CCD File 
Z
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.2 Å
  • R-Value Free: 0.410 
  • R-Value Work: 0.415 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 86.500α = 90.00
b = 52.100β = 100.30
c = 164.600γ = 90.00
Software Package:
Software NamePurpose
CCP4data scaling
AMoREphasing
CNSrefinement
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-10-25
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2018-01-31
    Type: Experimental preparation