4C4E

Structure-based design of orally bioavailable pyrrolopyridine inhibitors of the mitotic kinase MPS1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.212 
  • R-Value Work: 0.187 
  • R-Value Observed: 0.188 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.3 of the entry. See complete history


Literature

Structure-Based Design of Orally Bioavailable 1H-Pyrrolo[3, 2-C]Pyridine Inhibitors of the Mitotic Kinase Monopolar Spindle 1 (Mps1).

Naud, S.Westwood, I.M.Faisal, A.Sheldrake, P.W.Bavetsias, V.Atrash, B.Cheung, K.J.Liu, M.Hayes, A.Schmitt, J.Wood, A.Choi, V.Boxall, K.Mak, G.Gurden, M.Valenti, M.De-Haven-Brandon, A.Henley, A.Baker, R.Mcandrew, C.Matijssen, B.Burke, R.Hoelder, S.Eccles, S.A.Raynaud, F.I.Linardopoulos, S.Van Montfort, R.L.M.Blagg, J.

(2013) J Med Chem 56: 10045

  • DOI: https://doi.org/10.1021/jm401395s
  • Primary Citation of Related Structures:  
    4C4E, 4C4F, 4C4G, 4C4H, 4C4I, 4C4J

  • PubMed Abstract: 

    The protein kinase MPS1 is a crucial component of the spindle assembly checkpoint signal and is aberrantly overexpressed in many human cancers. MPS1 is one of the top 25 genes overexpressed in tumors with chromosomal instability and aneuploidy. PTEN-deficient breast tumor cells are particularly dependent upon MPS1 for their survival, making it a target of significant interest in oncology. We report the discovery and optimization of potent and selective MPS1 inhibitors based on the 1H-pyrrolo[3,2-c]pyridine scaffold, guided by structure-based design and cellular characterization of MPS1 inhibition, leading to 65 (CCT251455). This potent and selective chemical tool stabilizes an inactive conformation of MPS1 with the activation loop ordered in a manner incompatible with ATP and substrate-peptide binding; it displays a favorable oral pharmacokinetic profile, shows dose-dependent inhibition of MPS1 in an HCT116 human tumor xenograft model, and is an attractive tool compound to elucidate further the therapeutic potential of MPS1 inhibition.


  • Organizational Affiliation

    Cancer Research UK Cancer Therapeutics Unit, Division of Cancer Therapeutics, The Institute of Cancer Research , London SM2 5NG, United Kingdom.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
DUAL SPECIFICITY PROTEIN KINASE TTK313Homo sapiensMutation(s): 0 
EC: 2.7.12.1
UniProt & NIH Common Fund Data Resources
Find proteins for P33981 (Homo sapiens)
Explore P33981 
Go to UniProtKB:  P33981
PHAROS:  P33981
GTEx:  ENSG00000112742 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP33981
Sequence Annotations
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  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
TPO
Query on TPO
A
L-PEPTIDE LINKINGC4 H10 N O6 PTHR
Binding Affinity Annotations 
IDSourceBinding Affinity
4T9 BindingDB:  4C4E IC50: 25 (nM) from 1 assay(s)
PDBBind:  4C4E IC50: 25 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.212 
  • R-Value Work: 0.187 
  • R-Value Observed: 0.188 
  • Space Group: I 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 70.94α = 90
b = 111.79β = 90
c = 113.4γ = 90
Software Package:
Software NamePurpose
BUSTERrefinement
MOSFLMdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment 


Entry History 

Revision History  (Full details and data files)

  • Version 1.0: 2013-12-04
    Type: Initial release
  • Version 1.1: 2014-01-15
    Changes: Database references
  • Version 1.2: 2023-12-20
    Changes: Data collection, Database references, Derived calculations, Other, Refinement description
  • Version 1.3: 2024-10-23
    Changes: Structure summary