A | B | C | D | E | F | G | H | CH | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9
apigenin 4'-O-methyltransferase | |||||||||
---|---|---|---|---|---|---|---|---|---|
Identifiers | |||||||||
EC no. | 2.1.1.75 | ||||||||
CAS no. | 118251-36-8 | ||||||||
Databases | |||||||||
IntEnz | IntEnz view | ||||||||
BRENDA | BRENDA entry | ||||||||
ExPASy | NiceZyme view | ||||||||
KEGG | KEGG entry | ||||||||
MetaCyc | metabolic pathway | ||||||||
PRIAM | profile | ||||||||
PDB structures | RCSB PDB PDBe PDBsum | ||||||||
Gene Ontology | AmiGO / QuickGO | ||||||||
|
In enzymology, an apigenin 4'-O-methyltransferase (EC 2.1.1.75) is an enzyme that catalyzes the chemical reaction
- S-adenosyl-L-methionine + 5,7,4'-trihydroxyflavone S-adenosyl-L-homocysteine + 4'-methoxy-5,7-dihydroxyflavone
Thus, the two substrates of this enzyme are S-adenosyl methionine and 5,7,4'-trihydroxyflavone (apigenin), whereas its two products are S-adenosylhomocysteine and 4'-methoxy-5,7-dihydroxyflavone (acacetin).
This enzyme belongs to the family of transferases, specifically those transferring one-carbon group methyltransferases. The systematic name of this enzyme class is S-adenosyl-L-methionine:5,7,4'-trihydroxyflavone 4'-O-methyltransferase. Other names in common use include flavonoid O-methyltransferase, and flavonoid methyltransferase. This enzyme participates in flavonoid biosynthesis.
References
- Kuroki G, Poulton JE (1981). "The para-O-methylation of apigenin to acacetin by cell-free extracts of Robinia pseudoacacia L". Z. Naturforsch. C: Biosci. 36: 916–920.
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