Structure based design of RIP1 kinase inhibitors

Experimental Data Snapshot

  • Resolution: 2.52 Å
  • R-Value Free: 0.296 
  • R-Value Work: 0.236 
  • R-Value Observed: 0.246 

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This is version 1.2 of the entry. See complete history


Discovery of 7-Oxo-2,4,5,7-tetrahydro-6 H-pyrazolo[3,4- c]pyridine Derivatives as Potent, Orally Available, and Brain-Penetrating Receptor Interacting Protein 1 (RIP1) Kinase Inhibitors: Analysis of Structure-Kinetic Relationships.

Yoshikawa, M.Saitoh, M.Katoh, T.Seki, T.Bigi, S.V.Shimizu, Y.Ishii, T.Okai, T.Kuno, M.Hattori, H.Watanabe, E.Saikatendu, K.S.Zou, H.Nakakariya, M.Tatamiya, T.Nakada, Y.Yogo, T.

(2018) J Med Chem 61: 2384-2409

  • DOI: https://doi.org/10.1021/acs.jmedchem.7b01647
  • Primary Citation of Related Structures:  
    6C3E, 6C4D

  • PubMed Abstract: 

    We report the discovery of 7-oxo-2,4,5,7-tetrahydro-6 H-pyrazolo[3,4- c]pyridine derivatives as a novel class of receptor interacting protein 1 (RIP1) kinase inhibitors. On the basis of the overlay study between HTS hit 10 and GSK2982772 (6) in RIP1 kinase, we designed and synthesized a novel class of RIP1 kinase inhibitor 11 possessing moderate RIP1 kinase inhibitory activity and P-gp mediated efflux. The optimization of the core structure and the exploration of appropriate substituents utilizing SBDD approach led to the discovery of 22, a highly potent, orally available, and brain-penetrating RIP1 kinase inhibitor with excellent PK profiles. Compound 22 significantly suppressed necroptotic cell death both in mouse and human cells. Oral administration of 22 (10 mg/kg, bid) attenuated disease progression in the mouse experimental autoimmune encephalomyelitis (EAE) model of multiple sclerosis (MS). Moreover, analysis of structure-kinetic relationship (SKR) for our novel chemical series was also discussed.

  • Organizational Affiliation

    Research , Takeda Pharmaceutical Company Limited , 26-1 Muraoka-Higashi 2-chome , Fujisawa , Kanagawa 251-8555 , Japan.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Receptor-interacting serine/threonine-protein kinase 1
A, B, C, D
297Homo sapiensMutation(s): 0 
Gene Names: RIPK1RIPRIP1
UniProt & NIH Common Fund Data Resources
Find proteins for Q13546 (Homo sapiens)
Explore Q13546 
Go to UniProtKB:  Q13546
PHAROS:  Q13546
GTEx:  ENSG00000137275 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ13546
Sequence Annotations
  • Reference Sequence
Small Molecules
Binding Affinity Annotations 
IDSourceBinding Affinity
EJP BindingDB:  6C4D Ki: 0.91 (nM) from 1 assay(s)
IC50: 1.3 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Resolution: 2.52 Å
  • R-Value Free: 0.296 
  • R-Value Work: 0.236 
  • R-Value Observed: 0.246 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 45.768α = 90
b = 138.133β = 96.08
c = 95.933γ = 90
Software Package:
Software NamePurpose
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2018-03-21
    Type: Initial release
  • Version 1.1: 2018-04-04
    Changes: Data collection, Database references
  • Version 1.2: 2024-03-13
    Changes: Data collection, Database references