Human Rho-associated protein kinase 1 (ROCK 1) in COMPLEX WITH RKI1342

Experimental Data Snapshot

  • Resolution: 2.75 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.205 

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Ligand Structure Quality Assessment 

This is version 1.2 of the entry. See complete history


Pyridylthiazole-based ureas as inhibitors of Rho associated protein kinases (ROCK1 and 2).

Pireddu, R.Forinash, K.D.Sun, N.N.Martin, M.P.Sung, S.S.Alexander, B.Zhu, J.Y.Guida, W.C.Schonbrunn, E.Sebti, S.M.Lawrence, N.J.

(2012) Medchemcomm 3: 699-709

  • DOI: https://doi.org/10.1039/C2MD00320A
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Potent ROCK inhibitors of a new class of 1-benzyl-3-(4-pyridylthiazol-2-yl)ureas have been identified. Remarkable differences in activity were observed for ureas bearing a benzylic stereogenic center. Derivatives with hydroxy, methoxy and amino groups at the meta position of the phenyl ring give rise to the most potent inhibitors (low nM). Substitutions at the para position result in substantial loss of potency. Changes at the benzylic position are tolerated resulting in significant potency in the case of methyl and methylenehydroxy groups. X-Ray crystallography was used to establish the binding mode of this class of inhibitors and provides an explanation for the observed differences of the enantiomer series. Potent inhibition of ROCK in human lung cancer cells was shown by suppression of the levels of phosphorylation of the ROCK substrate MYPT-1.

  • Organizational Affiliation

    The Department of Drug Discovery, Moffitt Cancer Center, 12902 Magnolia Drive, Tampa, Florida, 33612, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Rho-associated protein kinase 1
A, B, C, D
410Homo sapiensMutation(s): 0 
Gene Names: ROCK1
UniProt & NIH Common Fund Data Resources
Find proteins for Q13464 (Homo sapiens)
Explore Q13464 
Go to UniProtKB:  Q13464
PHAROS:  Q13464
GTEx:  ENSG00000067900 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ13464
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.75 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.205 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 151.01α = 90
b = 150.92β = 90
c = 185.57γ = 90
Software Package:
Software NamePurpose
StructureStudiodata collection
XDSdata reduction
XDSdata scaling

Structure Validation

View Full Validation Report

Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-02-15
    Type: Initial release
  • Version 1.1: 2013-01-16
    Changes: Database references
  • Version 1.2: 2023-09-13
    Changes: Data collection, Database references, Derived calculations, Refinement description