Tricin synthase

Tricin synthase (EC 2.1.1.175, ROMT-17, ROMT-15, HvOMT1, ZmOMT1) is an enzyme with systematic name S-adenosyl-L-methionine:tricetin 3',5'-O-dimethyltransferase.^[1][2] This enzyme catalyses the following chemical reaction

2 S-adenosyl-L-methionine + tricetin ${\displaystyle \rightleftharpoons }$ 2 S-adenosyl-L-homocysteine + 3',5'-O-dimethyltricetin (overall reaction)

(1a) S-adenosyl-L-methionine + tricetin ${\displaystyle \rightleftharpoons }$ S-adenosyl-L-homocysteine + 3'-O-methyltricetin

(1b) S-adenosyl-L-methionine + 3'-O-methyltricetin ${\displaystyle \rightleftharpoons }$ S-adenosyl-L-homocysteine + 3',5'-O-dimethyltricetin

Tricin synthase
Identifiers
EC no.	2.1.1.175
Databases
IntEnz	IntEnz view
BRENDA	BRENDA entry
ExPASy	NiceZyme view
KEGG	KEGG entry
MetaCyc	metabolic pathway
PRIAM	profile
PDB structures	RCSB PDB PDBe PDBsum
Search PMC articles PubMed articles NCBI proteins

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.