2XEL

Molecular Mechanism of Pentachloropseudilin Mediated Inhibition of Myosin Motor Activity


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.229 
  • R-Value Observed: 0.229 

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Ligand Structure Quality Assessment 


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: https://doi.org/10.1074/jbc.M111.239210
  • Primary Citation of Related Structures:  
    2XEL

  • 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 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:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
MYOSIN-2 HEAVY CHAIN776Dictyostelium discoideumMutation(s): 0 
UniProt
Find proteins for P08799 (Dictyostelium discoideum)
Explore P08799 
Go to UniProtKB:  P08799
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP08799
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
AD9
Query on AD9

Download Ideal Coordinates CCD File 
B [auth A]ADP METAVANADATE
C10 H16 N5 O13 P2 V
XLVFTLJPBLXCED-KWIZKVQNSA-K
IA2
Query on IA2

Download Ideal Coordinates CCD File 
D [auth A]2,4-DICHLORO-6-(3,4,5-TRICHLORO-1H-PYRROL-2YL)PHENOL
C10 H4 Cl5 N O
FBRLLYYPGGXCKT-UHFFFAOYSA-N
MG
Query on MG

Download Ideal Coordinates CCD File 
C [auth A]MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
Binding Affinity Annotations 
IDSourceBinding Affinity
IA2 PDBBind:  2XEL IC50: 1.27e+5 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.229 
  • R-Value Observed: 0.229 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 89.53α = 90
b = 147.49β = 90
c = 153.78γ = 90
Software Package:
Software NamePurpose
CNSrefinement
XDSdata reduction
XSCALEdata scaling
CNSphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Revision History  (Full details and data files)

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