6VHG

Crystal structure of phosphorylated RET tyrosine kinase domain complexed with a pyrazolo[1,5-a]pyrimidine inhibitor

Summary for 6VHG

• Entry DOI: 10.2210/pdb6vhg/pdb
• Descriptor: Proto-oncogene tyrosine-protein kinase receptor Ret, 3-(3,4-dimethoxyphenyl)-N~5~-(1-methylpiperidin-4-yl)-6-phenylpyrazolo[1,5-a]pyrimidine-5,7-diamine, SULFATE ION, ... (6 entities in total)
• Functional Keywords: inhibitor, complex, tyrosine kinase, catalytic domain, transferase-transferase inhibitor complex, transferase/transferase inhibitor
• Biological source: Homo sapiens (Human)
• Total number of polymer chains: 1
• Total formula weight: 36501.53

Authors

Lee, C.C.,Spraggon, G. (deposition date: 2020-01-09, release date: 2020-02-26, Last modification date: 2024-10-23)

Primary citation

Mathison, C.J.N.,Chianelli, D.,Rucker, P.V.,Nelson, J.,Roland, J.,Huang, Z.,Yang, Y.,Jiang, J.,Xie, Y.F.,Epple, R.,Bursulaya, B.,Lee, C.,Gao, M.Y.,Shaffer, J.,Briones, S.,Sarkisova, Y.,Galkin, A.,Li, L.,Li, N.,Li, C.,Hua, S.,Kasibhatla, S.,Kinyamu-Akunda, J.,Kikkawa, R.,Molteni, V.,Tellew, J.E.
Efficacy and Tolerability of Pyrazolo[1,5-a]pyrimidine RET Kinase Inhibitors for the Treatment of Lung Adenocarcinoma.
Acs Med.Chem.Lett., 11:558-565, 2020

PubMed Abstract: RET (REarranged during Transfection) kinase gain-of-function aberrancies have been identified as potential oncogenic drivers in lung adenocarcinoma, along with several other cancer types, prompting the discovery and assessment of selective inhibitors. Internal mining and analysis of relevant kinase data informed the decision to investigate a pyrazolo[1,5-]pyrimidine scaffold, where subsequent optimization led to the identification of compound WF-47-JS03 (), a potent RET kinase inhibitor with >500-fold selectivity against KDR (Kinase insert Domain Receptor) in cellular assays. In subsequent mouse studies, compound demonstrated effective brain penetration and was found to induce strong regression of RET-driven tumor xenografts at a well-tolerated dose (10 mg/kg, po, qd). Higher doses of , however, were poorly tolerated in mice, similar to other pyrazolo[1,5-]pyrimidine compounds at or near the efficacious dose, and indicative of the narrow therapeutic windows seen with this scaffold.

PubMed: 32292564
DOI: 10.1021/acsmedchemlett.0c00015

Experimental method

X-RAY DIFFRACTION (2.303 Å)