1B7T

MYOSIN DIGESTED BY PAPAIN


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.297 
  • R-Value Work: 0.224 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

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: 459-470

  • Also Cited By: 3DTP, 3JAX

  • PubMed Abstract: 
  • The crystal structure of a proteolytic subfragment from scallop striated muscle myosin, complexed with MgADP, has been solved at 2.5 A resolution and reveals an unusual conformation of the myosin head. The converter and the lever arm are in very diff ...

    The crystal structure of a proteolytic subfragment from scallop striated muscle myosin, complexed with MgADP, has been solved at 2.5 A resolution and reveals an unusual conformation of the myosin head. The converter and the lever arm are in very different positions from those in either the pre-power stroke or near-rigor state structures; moreover, in contrast to these structures, the SH1 helix is seen to be unwound. Here we compare the overall organization of the myosin head in these three states and show how the conformation of three flexible "joints" produces rearrangements of the four major subdomains in the myosin head with different bound nucleotides. We believe that this novel structure represents one of the prehydrolysis ("ATP") states of the contractile cycle in which the myosin heads stay detached from actin.


    Organizational Affiliation

    Rosenstiel Basic Medical Sciences Research Center, Brandeis University, Waltham, Massachusetts 02254-9110, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
MYOSIN HEAVY CHAIN
A
835Argopecten irradiansN/A
Find proteins for P24733 (Argopecten irradians)
Go to UniProtKB:  P24733
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
MYOSIN REGULATORY LIGHT CHAIN
Y
156Argopecten irradiansN/A
Find proteins for P13543 (Argopecten irradians)
Go to UniProtKB:  P13543
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
MYOSIN ESSENTIAL LIGHT CHAIN
Z
156Argopecten irradiansN/A
Find proteins for P07291 (Argopecten irradians)
Go to UniProtKB:  P07291
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ADP
Query on ADP

Download SDF File 
Download CCD File 
A
ADENOSINE-5'-DIPHOSPHATE
C10 H15 N5 O10 P2
XTWYTFMLZFPYCI-KQYNXXCUSA-N
 Ligand Interaction
CA
Query on CA

Download SDF File 
Download CCD File 
Z
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

Download SDF File 
Download CCD File 
A, Y
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.297 
  • R-Value Work: 0.224 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 51.700α = 89.10
b = 58.900β = 90.00
c = 138.900γ = 73.50
Software Package:
Software NamePurpose
AMoREphasing
SCALAdata scaling
CCP4data scaling
DENZOdata reduction
X-PLORrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-05-12
    Type: Initial release
  • Version 1.1: 2008-04-26
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance