1FMW

CRYSTAL STRUCTURE OF THE MGATP COMPLEX FOR THE MOTOR DOMAIN OF DICTYOSTELIUM MYOSIN II


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.286 
  • R-Value Work: 0.206 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

X-ray structures of the apo and MgATP-bound states of Dictyostelium discoideum myosin motor domain.

Bauer, C.B.Holden, H.M.Thoden, J.B.Smith, R.Rayment, I.

(2000) J.Biol.Chem. 275: 38494-38499

  • DOI: 10.1074/jbc.M005585200
  • Primary Citation of Related Structures:  1FMV

  • PubMed Abstract: 
  • Myosin is the most comprehensively studied molecular motor that converts energy from the hydrolysis of MgATP into directed movement. Its motile cycle consists of a sequential series of interactions between myosin, actin, MgATP, and the products of hy ...

    Myosin is the most comprehensively studied molecular motor that converts energy from the hydrolysis of MgATP into directed movement. Its motile cycle consists of a sequential series of interactions between myosin, actin, MgATP, and the products of hydrolysis, where the affinity of myosin for actin is modulated by the nature of the nucleotide bound in the active site. The first step in the contractile cycle occurs when ATP binds to actomyosin and releases myosin from the complex. We report here the structure of the motor domain of Dictyostelium discoideum myosin II both in its nucleotide-free state and complexed with MgATP. The structure with MgATP was obtained by soaking the crystals in substrate. These structures reveal that both the apo form and the MgATP complex are very similar to those previously seen with MgATPgammaS and MgAMP-PNP. Moreover, these structures are similar to that of chicken skeletal myosin subfragment-1. The crystallized protein is enzymatically active in solution, indicating that the conformation of myosin observed in chicken skeletal myosin subfragment-1 is unable to hydrolyze ATP and most likely represents the pre-hydrolysis structure for the myosin head that occurs after release from actin.


    Organizational Affiliation

    Department of Biochemistry, University of Wisconsin, Madison, Wisconsin 53706-1544, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
MYOSIN II HEAVY CHAIN
A
761Dictyostelium discoideumGene Names: mhcA
Find proteins for P08799 (Dictyostelium discoideum)
Go to UniProtKB:  P08799
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ATP
Query on ATP

Download SDF File 
Download CCD File 
A
ADENOSINE-5'-TRIPHOSPHATE
C10 H16 N5 O13 P3
ZKHQWZAMYRWXGA-KQYNXXCUSA-N
 Ligand Interaction
MG
Query on MG

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

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.286 
  • R-Value Work: 0.206 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 104.100α = 90.00
b = 180.400β = 90.00
c = 54.200γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
TNTrefinement
AMoREphasing
CCP4data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-11-22
    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: 2012-11-21
    Type: Atomic model, Experimental preparation