CHS — Oryza sativa Indica Group

Summary

BGIOSGA032588 (symbol CHS, preferred name OiCHS) in Indica rice chromosome 10 encodes a chalcone synthase, a type III polyketide synthase with chalcone/stilbene synthase and thiolase-like domains. The enzyme exhibits naringenin-chalcone synthase, biphenyl synthase, and bisdemethoxycurcumin synthase activities, along with acyltransferase and protein homodimerization activity. This gene is associated with the regulation of flavonoid and polyketide biosynthesis, pigmentation, pollen wall assembly, leaf senescence, and developmental processes. It localizes to the cytoplasm and has been linked to hull color and oxidative stress response. Studies of related genes in other species link the family to EC 2.3.1.74 and EC 2.3.1.211 activities, though these are not established for OiCHS itself.