7rsv
Structure of the VPS34 kinase domain with compound 5Structure of the VPS34 kinase domain with compound 5
Structural highlights
Function[PK3C3_HUMAN] Catalytic subunit of the PI3K complex that mediates formation of phosphatidylinositol 3-phosphate which plays a key role in initiation and maturation of autophagosomes. Involved in the transport of lysosomal enzyme precursors to lysosomes. Required for the abcission step in cytokinesis. Required for transport from early to late endosomes.[1] [2] [3] Publication Abstract from PubMedVPS34 is a class III phosphoinositide 3-kinase involved in endosomal trafficking and autophagosome formation. Inhibitors of VPS34 were believed to have value as anticancer agents, but genetic and pharmacological data suggest that sustained inhibition of VPS34 kinase activity may not be well tolerated. Here we disclose the identification of a novel series of dihydropyrazolopyrazinone compounds represented by compound 5 as potent, selective, and orally bioavailable VPS34 inhibitors through a structure-based design strategy. A water-interacting hydrogen bond acceptor within an appropriate distance to a hinge-binding element was found to afford significant VPS34 potency across chemical scaffolds. The selectivity of compound 5 over PIK family kinases arises from interactions between the hinge-binding element and the pseudo-gatekeeper residue Met682. As recent in vivo pharmacology data suggests that sustained inhibition of VPS34 kinase activity may not be tolerated, structure-activity relationships leading to VPS34 inhibition may be helpful for avoiding this target in other ATP-competitive kinase programs. Structure-Based Design of Potent, Selective, and Orally Bioavailable VPS34 Kinase Inhibitors.,Hu DX, Patel S, Chen H, Wang S, Staben ST, Dimitrova YN, Wallweber HA, Lee JY, Chan GKY, Sneeringer CJ, Prangley MS, Moffat JG, Wu KC, Schutt LK, Salphati L, Pang J, McNamara E, Huang H, Chen Y, Wang Y, Zhao W, Lim J, Murthy A, Siu M J Med Chem. 2021 Nov 15. doi: 10.1021/acs.jmedchem.1c01180. PMID:34779204[4] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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