IDEAYA Biosciences, Inc., a synthetic lethality-focused precision medicine oncology company, focuses on the discovery and development of targeted therapeutics for patient populations selected using molecular diagnostics. The company's lead product candidates include IDE397, a methionine adenosyltransferase 2a inhibitor that is in Phase I clinical trial for patients with solid tumors having methylthioadenosine phosphorylase deletions and IDE196, a protein kinase C inhibitor that is in Phase I/II clinical trial for genetically defined cancers having GNAQ or GNA11 gene mutations. Its preclinical pipeline includes various synthetic lethality programs targeting PARG inhibitor in tumors for patients having tumors with a defined biomarker based on genetic mutations and/or molecular signatures Pol Theta inhibitors in tumors with BRCA or other homologous recombination deficiency mutations and WRN inhibitors in tumors with high microsatellite instability. The company has a research collaboration agreement with Cancer Research UK and the University of Manchester to develop small molecule inhibitors of Poly (ADP-ribose) glycohydrolase and a clinical trial collaboration and supply agreement with Pfizer Inc. for Phase I/II study in metastatic uveal melanoma, skin melanoma, and other solid tumors, as well as a strategic partnership with GlaxoSmithKline plc. IDEAYA Biosciences, Inc. was incorporated in 2015 and is headquartered in South San Francisco, California.