9EP8

Crystal structure of ROCK2 in complex with a 8-(azaindolyl)-benzoazepinone inhibitor


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.63 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.202 
  • R-Value Observed: 0.203 

Starting Model: experimental
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This is version 1.2 of the entry. See complete history


Literature

Design and synthesis of novel 8-(azaindolyl)-benzoazepinones as potent and selective ROCK inhibitors.

Pala, D.Clark, D.Edwards, C.Pasqua, E.Tigli, L.Pioselli, B.Malysa, P.Facchinetti, F.Rancati, F.Accetta, A.

(2024) RSC Med Chem 15: 3862-3879

  • DOI: https://doi.org/10.1039/d4md00313f
  • Primary Citation of Related Structures:  
    9EP8

  • PubMed Abstract: 

    We report the characterization of potent and selective ROCK inhibitors identified through a core-hopping strategy. A virtual screening workflow, combining ligand- and structure-based methods, was applied on a known series of ROCK inhibitors bearing an acetamido-thiazole scaffold. The most promising replacement of the central core was represented by a benzoazepinone ring, which was selected as a starting point for a subsequent chemical exploration. The overall design approach exploited previous SARs available for congeneric series and crystallographic information to optimize the hinge-binding group as well as the terminal aromatic moiety interacting with the glycine-rich loop. The introduction of elongated and flexible charged groups led to compound 15, which exhibited sub-nanomolar potencies in biochemical and cellular assays, as well as a remarkable selectivity over PKA. HDX studies not only supported the postulated binding mode of compound 15 but also confirmed the crucial role of specific ROCK peptide segments in driving ligand selectivity.


  • Organizational Affiliation

    Global Research and Preclinical Development, Chiesi Farmaceutici S.p.A Parma 43122 Italy d.pala@chiesi.com a.accetta@chiesi.com.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Rho-associated protein kinase 2
A, B, C, D
402Homo sapiensMutation(s): 0 
Gene Names: ROCK2KIAA0619
EC: 2.7.11.1
UniProt & NIH Common Fund Data Resources
Find proteins for O75116 (Homo sapiens)
Explore O75116 
Go to UniProtKB:  O75116
PHAROS:  O75116
GTEx:  ENSG00000134318 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO75116
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.63 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.202 
  • R-Value Observed: 0.203 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 151.409α = 90
b = 134.292β = 109.71
c = 93.548γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
XSCALEdata scaling
REFMACrefinement
MOLREPphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Other private--

Revision History  (Full details and data files)

  • Version 1.0: 2024-09-25
    Type: Initial release
  • Version 1.1: 2024-10-02
    Changes: Database references
  • Version 1.2: 2024-11-27
    Changes: Database references, Structure summary