KEGG   ENZYME: 2.1.1.175
Entry
EC 2.1.1.175                Enzyme                                 
Name
tricin synthase;
ROMT-17;
ROMT-15;
HvOMT1;
ZmOMT1
Class
Transferases;
Transferring one-carbon groups;
Methyltransferases
Sysname
S-adenosyl-L-methionine:tricetin 3',5'-O-dimethyltransferase
Reaction(IUBMB)
2 S-adenosyl-L-methionine + tricetin = 2 S-adenosyl-L-homocysteine + 3',5'-O-dimethyltricetin (overall reaction) [RN:R09611];
(1a) S-adenosyl-L-methionine + tricetin = S-adenosyl-L-homocysteine + 3'-O-methyltricetin [RN:R09612];
(1b) S-adenosyl-L-methionine + 3'-O-methyltricetin = S-adenosyl-L-homocysteine + 3',5'-O-dimethyltricetin [RN:R09613]
Reaction(KEGG)
Substrate
S-adenosyl-L-methionine [CPD:C00019];
tricetin [CPD:C10192];
3'-O-methyltricetin [CPD:C19739]
Product
S-adenosyl-L-homocysteine [CPD:C00021];
3',5'-O-dimethyltricetin [CPD:C10193];
3'-O-methyltricetin [CPD:C19739]
Comment
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].
History
EC 2.1.1.175 created 2010
Orthology
K18883  tricin synthase
Genes
OSA4345934 4345935
DOSAOs08t0498100-01(Os08g0498100) Os08t0498400-01(Os08g0498400)
OBR102700170 102710810
BDI100834823 100835440
ATS109743045 109747993 109756499
TDC119288048 119316064 119329404 119336837
TAES123083351 123150965 123150971 123157223 123159214 123162454 123165415 543338
SBI8055220 8067015
ZMA100286091 100286151
SITA101753161 101753989
SVS117861337 117862113
PVIR120678905 120713686 120713688
PHAI112896214 112897774
 » show all
Reference
1  [PMID:17943312]
  Authors
Lee YJ, Kim BG, Chong Y, Lim Y, Ahn JH
  Title
Cation dependent O-methyltransferases from rice.
  Journal
Planta 227:641-7 (2008)
DOI:10.1007/s00425-007-0646-4
  Sequence
Reference
2
  Authors
Zhou, J.-M., Fukushi, Y., Wollenweber, E., Ibrahim, R.K.
  Title
Characterization of two O-methyltransferase-like genes in barley and maize.
  Journal
Pharm Biol 46:26-34 (2008)
Other DBs
ExplorEnz - The Enzyme Database: 2.1.1.175
IUBMB Enzyme Nomenclature: 2.1.1.175
ExPASy - ENZYME nomenclature database: 2.1.1.175
BRENDA, the Enzyme Database: 2.1.1.175

DBGET integrated database retrieval system