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)
R09611 R09612 R09613
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
OSA: 4345934 4345935
DOSA: Os08t0498100-01(Os08g0498100) Os08t0498400-01(Os08g0498400)
OBR: 102700170 102710810
OGL: 127782388 127782389
BDI: 100834823 100835440
ATS: 109743045 109747993 109756499
TDC: 119288048 119316064 119329404 119330572 119336837 119337762
TAES: 123083351 123150965 123150971 123157223 123159214 123162454 123165415 543338
TUA: 125520428 125521416
LPER: 127316932 127316933 127316934
LRD: 124677111 124677144 124677161 124677187 124677207 124677218
SBI: 8055220 8067015 8067017
ZMA: 100286091 100286151
SITA: 101753161 101753568 101753989
SVS: 117861337 117862113
PVIR: 120678905 120680034 120713686 120713688
PHAI: 112896214 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
[osa:4345934 4345935]
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

  All links  
Chemical substance (5)   
   KEGG COMPOUND (5)   
Chemical reaction (6)   
   KEGG REACTION (3)   
   KEGG RCLASS (3)   
Gene (55)   
   KEGG ORTHOLOGY (1)   
   KEGG GENES (54)   
Protein sequence (9)   
   UniProt (3)   
   SWISS-PROT (3)   
   RefSeq(pep) (3)   
DNA sequence (3)   
   RefSeq(nuc) (3)   
Protein domain (9)   
   InterPro (9)   
All databases (87)   

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