6H3K

Introduction of a methyl group curbs metabolism of pyrido[3,4-d]pyrimidine MPS1 inhibitors and enables the discovery of the Phase 1 clinical candidate BOS172722.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.48 Å
  • R-Value Free: 0.231 
  • R-Value Work: 0.208 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Introduction of a Methyl Group Curbs Metabolism of Pyrido[3,4- d]pyrimidine Monopolar Spindle 1 (MPS1) Inhibitors and Enables the Discovery of the Phase 1 Clinical Candidate N2-(2-Ethoxy-4-(4-methyl-4 H-1,2,4-triazol-3-yl)phenyl)-6-methyl- N8-neopentylpyrido[3,4- d]pyrimidine-2,8-diamine (BOS172722).

Woodward, H.L.Innocenti, P.Cheung, K.J.Hayes, A.Roberts, J.Henley, A.T.Faisal, A.Mak, G.W.Box, G.Westwood, I.M.Cronin, N.Carter, M.Valenti, M.De Haven Brandon, A.O'Fee, L.Saville, H.Schmitt, J.Burke, R.Broccatelli, F.van Montfort, R.L.M.Raynaud, F.I.Eccles, S.A.Linardopoulos, S.Blagg, J.Hoelder, S.

(2018) J. Med. Chem. 61: 8226-8240

  • DOI: 10.1021/acs.jmedchem.8b00690

  • PubMed Abstract: 
  • Monopolar spindle 1 (MPS1) occupies a central role in mitosis and is one of the main components of the spindle assembly checkpoint. The MPS1 kinase is an attractive cancer target, and herein, we report the discovery of the clinical candidate BOS17272 ...

    Monopolar spindle 1 (MPS1) occupies a central role in mitosis and is one of the main components of the spindle assembly checkpoint. The MPS1 kinase is an attractive cancer target, and herein, we report the discovery of the clinical candidate BOS172722. The starting point for our work was a series of pyrido[3,4- d]pyrimidine inhibitors that demonstrated excellent potency and kinase selectivity but suffered from rapid turnover in human liver microsomes (HLM). Optimizing HLM stability proved challenging since it was not possible to identify a consistent site of metabolism and lowering lipophilicity proved unsuccessful. Key to overcoming this problem was the finding that introduction of a methyl group at the 6-position of the pyrido[3,4- d]pyrimidine core significantly improved HLM stability. Met ID studies suggested that the methyl group suppressed metabolism at the distant aniline portion of the molecule, likely by blocking the preferred pharmacophore through which P450 recognized the compound. This work ultimately led to the discovery of BOS172722 as a Phase 1 clinical candidate.


    Organizational Affiliation

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




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Dual specificity protein kinase TTK
A
279Homo sapiensMutation(s): 0 
Gene Names: TTK (MPS1, MPS1L1)
EC: 2.7.12.1
Find proteins for P33981 (Homo sapiens)
Go to Gene View: TTK
Go to UniProtKB:  P33981
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FMW
Query on FMW

Download SDF File 
Download CCD File 
A
~{N}8-(2,2-dimethylpropyl)-~{N}2-[2-ethoxy-4-(4-methyl-1,2,4-triazol-3-yl)phenyl]-6-methyl-pyrido[3,4-d]pyrimidine-2,8-diamine
C24 H30 N8 O
SGWLRDAOCLITOM-UHFFFAOYSA-N
 Ligand Interaction
7PE
Query on 7PE

Download SDF File 
Download CCD File 
A
2-(2-(2-(2-(2-(2-ETHOXYETHOXY)ETHOXY)ETHOXY)ETHOXY)ETHOXY)ETHANOL
POLYETHYLENE GLYCOL FRAGMENT
C14 H30 O7
UKXKPKBTMYNOFS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.48 Å
  • R-Value Free: 0.231 
  • R-Value Work: 0.208 
  • Space Group: I 2 2 2
Unit Cell:
Length (Å)Angle (°)
a = 71.624α = 90.00
b = 107.644β = 90.00
c = 114.683γ = 90.00
Software Package:
Software NamePurpose
Aimlessdata scaling
XDSdata reduction
PHASERphasing
PDB_EXTRACTdata extraction
BUSTERrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
United Kingdom--

Revision History 

  • Version 1.0: 2018-09-19
    Type: Initial release
  • Version 1.1: 2018-10-10
    Type: Data collection, Database references