Characterization of a novel flavone O-methyltransferase gene in rice

Abstract

We report the characterization of a novel flavone O-methyltransferase cDNA (OsOMT1) from the rice genome database. Its recombinant protein utilizes tricetin as the preferred substrate, catalyzing its stepwise methylation to the monomethyl-(selgin), dimethyl-(tricin), as the major product, and trimethyl ether derivatives. The use of this gene to increase tricin content in grain crops is discussed in relation to its potential health benefits.