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Tricin synthase

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Tricin synthase
Identifiers
EC no.2.1.1.175
Databases
IntEnzIntEnz view
BRENDABRENDA entry
ExPASyNiceZyme view
KEGGKEGG entry
MetaCycmetabolic pathway
PRIAMprofile
PDB structuresRCSB PDB PDBe PDBsum
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NCBIproteins

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 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

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.

References

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  1. ^ Lee, Y.J.; Kim, B.G.; Chong, Y.; Lim, Y.; Ahn, J.H. (2008). "Cation dependent O-methyltransferases from rice". Planta. 227: 641–647. doi:10.1007/s00425-007-0646-4. PMID 17943312.
  2. ^ Zhou JM, Fukushi Y, Wollenweber E, Ibrahim RK (2008). "Characterization of two O-methyltransferase-like genes in barley and maize". Pharm. Biol. 46: 26–34. doi:10.1080/13880200701729745.
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