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| EC | 2.1.1.175 | ||||
| Accepted name: | tricin synthase | ||||
| Reaction: | 2 S-adenosyl-L-methionine + tricetin = 2 S-adenosyl-L-homocysteine + 3′,5′-O-dimethyltricetin (overall reaction) (1a) S-adenosyl-L-methionine + tricetin = S-adenosyl-L-homocysteine + 3′-O-methyltricetin (1b) S-adenosyl-L-methionine + 3′-O-methyltricetin = S-adenosyl-L-homocysteine + 3′,5′-O-dimethyltricetin |
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| Glossary: | tricin = 3′,5′-O-dimethyltricetin | ||||
| Other name(s): | ROMT-17; ROMT-15; HvOMT1; ZmOMT1 | ||||
| Systematic name: | S-adenosyl-L-methionine:tricetin 3′,5′-O-dimethyltransferase | ||||
| Comments: | The enzymes from Oryza sativa (ROMT-15 and ROMT-17) catalyses the stepwise methylation of tricetin to its 3′-mono- and 3′,5′-dimethyl ethers. In contrast with the wheat enzyme (EC 2.1.1.169, tricetin 3′,4′,5′-O-trimethyltransferase), tricetin dimethyl ether is not converted to its 3′,4′,5′-trimethylated ether derivative [1]. The enzymes from Hordeum vulgare (HvOMT1) and from Zea mays (ZmOMT1) form the 3′,5′-dimethyl derivative as the major product [2]. | ||||
| Links to other databases: | BRENDA, EXPASY, KEGG, MetaCyc | ||||
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