6OAC

PQR530 [(S)-4-(Difluoromethyl)-5-(4-(3-methylmorpholino)-6-morpholino-1,3,5-triazin-2-yl)pyridin-2-amine] bound to the PI3Ka catalytic subunit p110alpha


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.15 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.242 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

(S)-4-(Difluoromethyl)-5-(4-(3-methylmorpholino)-6-morpholino-1,3,5-triazin-2-yl)pyridin-2-amine (PQR530), a Potent, Orally Bioavailable, and Brain-Penetrable Dual Inhibitor of Class I PI3K and mTOR Kinase.

Rageot, D.Bohnacker, T.Keles, E.McPhail, J.A.Hoffmann, R.M.Melone, A.Borsari, C.Sriramaratnam, R.Sele, A.M.Beaufils, F.Hebeisen, P.Fabbro, D.Hillmann, P.Burke, J.E.Wymann, M.P.

(2019) J.Med.Chem. 62: 6241-6261

  • DOI: 10.1021/acs.jmedchem.9b00525

  • PubMed Abstract: 
  • The phosphoinositide 3-kinase (PI3K)/mechanistic target of rapamycin (mTOR) pathway is frequently overactivated in cancer, and drives cell growth, proliferation, survival, and metastasis. Here, we report a structure-activity relationship study, which ...

    The phosphoinositide 3-kinase (PI3K)/mechanistic target of rapamycin (mTOR) pathway is frequently overactivated in cancer, and drives cell growth, proliferation, survival, and metastasis. Here, we report a structure-activity relationship study, which led to the discovery of a drug-like adenosine 5'-triphosphate-site PI3K/mTOR kinase inhibitor: ( S)-4-(difluoromethyl)-5-(4-(3-methylmorpholino)-6-morpholino-1,3,5-triazin-2-yl)pyridin-2-amine (PQR530, compound 6), which qualifies as a clinical candidate due to its potency and specificity for PI3K and mTOR kinases, and its pharmacokinetic properties, including brain penetration. Compound 6 showed excellent selectivity over a wide panel of kinases and an excellent selectivity against unrelated receptor enzymes and ion channels. Moreover, compound 6 prevented cell growth in a cancer cell line panel. The preclinical in vivo characterization of compound 6 in an OVCAR-3 xenograft model demonstrated good oral bioavailability, excellent brain penetration, and efficacy. Initial toxicity studies in rats and dogs qualify 6 for further development as a therapeutic agent in oncology.


    Organizational Affiliation

    Department of Biochemistry and Microbiology , University of Victoria , Victoria , British Columbia V8W 2Y2 , Canada.,Department of Biomedicine , University of Basel , Mattenstrasse 28 , 4058 Basel , Switzerland.,PIQUR Therapeutics AG , Hochbergerstrasse 60C , 4057 Basel , Switzerland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit alpha isoform
A
948Homo sapiensMutation(s): 0 
Gene Names: PIK3CA
EC: 2.7.1.153
Find proteins for P42336 (Homo sapiens)
Go to Gene View: PIK3CA
Go to UniProtKB:  P42336
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
M1J
Query on M1J

Download SDF File 
Download CCD File 
A
4-(difluoromethyl)-5-{4-[(3S)-3-methylmorpholin-4-yl]-6-(morpholin-4-yl)-1,3,5-triazin-2-yl}pyridin-2-amine
C18 H23 F2 N7 O2
SYKBZXMKAPICSO-NSHDSACASA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.15 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.242 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 58.926α = 90.00
b = 135.511β = 90.00
c = 144.498γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
Aimlessdata scaling
PDB_EXTRACTdata extraction
XDSdata reduction
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Canadian Institutes of Health Research (CIHR)Canada142393

Revision History 

  • Version 1.0: 2019-06-26
    Type: Initial release
  • Version 1.1: 2019-07-10
    Type: Data collection, Database references
  • Version 1.2: 2019-07-24
    Type: Data collection, Database references
  • Version 1.3: 2020-01-08
    Type: Author supporting evidence