3TWJ

Rho-associated protein kinase 1 (ROCK 1) IN COMPLEX WITH RKI1447


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.224 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

RKI-1447 Is a Potent Inhibitor of the Rho-Associated ROCK Kinases with Anti-Invasive and Antitumor Activities in Breast Cancer.

Patel, R.A.Forinash, K.D.Pireddu, R.Sun, Y.Sun, N.Martin, M.P.Schonbrunn, E.Lawrence, N.J.Sebti, S.M.

(2012) Cancer Res 72: 5025-5034

  • DOI: 10.1158/0008-5472.CAN-12-0954
  • Primary Citation of Related Structures:  
    3TWJ

  • PubMed Abstract: 
  • The Rho-associated kinases ROCK1 and ROCK2 are critical for cancer cell migration and invasion, suggesting they may be useful therapeutic targets. In this study, we describe the discovery and development of RKI-1447, a potent small molecule inhibitor of ROCK1 and ROCK2 ...

    The Rho-associated kinases ROCK1 and ROCK2 are critical for cancer cell migration and invasion, suggesting they may be useful therapeutic targets. In this study, we describe the discovery and development of RKI-1447, a potent small molecule inhibitor of ROCK1 and ROCK2. Crystal structures of the RKI-1447/ROCK1 complex revealed that RKI-1447 is a Type I kinase inhibitor that binds the ATP binding site through interactions with the hinge region and the DFG motif. RKI-1447 suppressed phosphorylation of the ROCK substrates MLC-2 and MYPT-1 in human cancer cells, but had no effect on the phosphorylation levels of the AKT, MEK, and S6 kinase at concentrations as high as 10 μmol/L. RKI-1447 was also highly selective at inhibiting ROCK-mediated cytoskeleton re-organization (actin stress fiber formation) following LPA stimulation, but does not affect PAK-meditated lamellipodia and filopodia formation following PDGF and Bradykinin stimulation, respectively. RKI-1447 inhibited migration, invasion and anchorage-independent tumor growth of breast cancer cells. In contrast, RKI-1313, a much weaker analog in vitro, had little effect on the phosphorylation levels of ROCK substrates, migration, invasion or anchorage-independent growth. Finally, RKI-1447 was highly effective at inhibiting the outgrowth of mammary tumors in a transgenic mouse model. In summary, our findings establish RKI-1447 as a potent and selective ROCK inhibitor with significant anti-invasive and antitumor activities and offer a preclinical proof-of-concept that justify further examination of RKI-1447 suitability as a potential clinical candidate.


    Organizational Affiliation

    Drug Discovery Department, H Lee Moffitt Cancer Center and Research Institute, University of South Florida, Tampa, Florida 33612, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Rho-associated protein kinase 1 ABCD410Homo sapiensMutation(s): 0 
Gene Names: ROCK1
EC: 2.7.11.1
Find proteins for Q13464 (Homo sapiens)
Explore Q13464 
Go to UniProtKB:  Q13464
NIH Common Fund Data Resources
PHAROS:  Q13464
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
07R
Query on 07R

Download Ideal Coordinates CCD File 
A, C
1-[(3-hydroxyphenyl)methyl]-3-(4-pyridin-4-yl-1,3-thiazol-2-yl)urea
C16 H14 N4 O2 S
GDVRVPIXWXOKQO-UHFFFAOYSA-N
 Ligand Interaction
EDO
Query on EDO

Download Ideal Coordinates CCD File 
A, B, D
1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
07RIC50 :  14.5   nM  PDBBind
07RIC50:  13   nM  BindingDB
07RIC50:  0.5299999713897705   nM  BindingDB
07RIC50:  8   nM  BindingDB
07RIC50:  9   nM  BindingDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.224 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 145.67α = 90
b = 150.92β = 90
c = 205.09γ = 90
Software Package:
Software NamePurpose
StructureStudiodata collection
MOLREPphasing
PHENIXrefinement
XDSdata reduction
XDSdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-08-22
    Type: Initial release
  • Version 1.1: 2012-10-17
    Changes: Database references