2XEL

Molecular Mechanism of Pentachloropseudilin Mediated Inhibition of Myosin Motor Activity

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.229 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history. 

Literature

Mechanism and Specificity of Pentachloropseudilin-Mediated Inhibition of Myosin Motor Activity.

Chinthalapudi, K., Taft, M.H., Martin, R., Heissler, S.M., Preller, M., Hartmann, F.K., Brandstaetter, H., Kendrick-Jones, J., Tsiavaliaris, G., Gutzeit, H.O., Fedorov, R., Buss, F., Knoelker, H.J., Coluccio, L.M., Manstein, D.J.

(2011) J.Biol.Chem. 286: 29700

  • DOI: 10.1074/jbc.M111.239210

  • PubMed Abstract: 

    • Here, we report that the natural compound pentachloropseudilin (PClP) acts as a reversible and allosteric inhibitor of myosin ATPase and motor activity. IC(50) values are in the range from 1 to 5 μm for mammalian class-1 myosins and greater than 90 μ ...

    Here, we report that the natural compound pentachloropseudilin (PClP) acts as a reversible and allosteric inhibitor of myosin ATPase and motor activity. IC(50) values are in the range from 1 to 5 μm for mammalian class-1 myosins and greater than 90 μm for class-2 and class-5 myosins, and no inhibition was observed with class-6 and class-7 myosins. We show that in mammalian cells, PClP selectively inhibits myosin-1c function. To elucidate the structural basis for PClP-induced allosteric coupling and isoform-specific differences in the inhibitory potency of the compound, we used a multifaceted approach combining direct functional, crystallographic, and in silico modeling studies. Our results indicate that allosteric inhibition by PClP is mediated by the combined effects of global changes in protein dynamics and direct communication between the catalytic and allosteric sites via a cascade of small conformational changes along a conserved communication pathway.

    Organizational Affiliation: 

    Research Centre for Structural Analysis, Hannover Medical School, Hannover, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
MYOSIN-2 HEAVY CHAIN
A
776Dictyostelium discoideumMutation(s): 0 
Gene Names: mhcA
Find proteins for P08799 (Dictyostelium discoideum)
Go to UniProtKB:  P08799
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MG
Query on MG
Download SDF File 
Download CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
IA2
Query on IA2
Download SDF File 
Download CCD File 
A
2,4-DICHLORO-6-(3,4,5-TRICHLORO-1H-PYRROL-2YL)PHENOL
C10 H4 Cl5 N O
FBRLLYYPGGXCKT-UHFFFAOYSA-N
 Ligand Interaction
AD9
Query on AD9
Download SDF File 
Download CCD File 
A
ADP METAVANADATE
C10 H16 N5 O13 P2 V
XLVFTLJPBLXCED-KWIZKVQNSA-K
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
IA2IC50: 126600 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.229 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 89.530α = 90.00
b = 147.490β = 90.00
c = 153.780γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
XSCALEdata scaling
CNSphasing
CNSrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-06-15
    Type: Initial release
  • Version 1.1: 2011-08-31
    Type: Database references, Version format compliance