Luteolin O-methyltransferase

In enzymology, a luteolin O-methyltransferase (EC 2.1.1.42) is an enzyme that catalyzes the chemical reaction

S-adenosyl-L-methionine + 5,7,3',4'-tetrahydroxyflavone S-adenosyl-L-homocysteine + 5,7,4'-trihydroxy-3'-methoxyflavone
luteolin O-methyltransferase
Identifiers
EC no.2.1.1.42
CAS no.37205-55-3
Databases
IntEnzIntEnz view
BRENDABRENDA entry
ExPASyNiceZyme view
KEGGKEGG entry
MetaCycmetabolic pathway
PRIAMprofile
PDB structuresRCSB PDB PDBe PDBsum
Gene OntologyAmiGO / QuickGO
Search
PMCarticles
PubMedarticles
NCBIproteins

Thus, the two substrates of this enzyme are S-adenosyl methionine and 5,7,3',4'-tetrahydroxyflavone (luteolin), whereas its two products are S-adenosylhomocysteine and 5,7,4'-trihydroxy-3'-methoxyflavone.

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:5,7,3',4'-tetrahydroxyflavone 3'-O-methyltransferase. Other names in common use include o-dihydric phenol methyltransferase, luteolin methyltransferase, luteolin 3'-O-methyltransferase, o-diphenol m-O-methyltransferase, o-dihydric phenol meta-O-methyltransferase, and S-adenosylmethionine:flavone/flavonol 3'-O-methyltransferase. This enzyme participates in flavonoid biosynthesis.

References

    • Ebel J, Hahlbrock K, Grisebach H (1972). "Purification and properties of an o-dihydricphenol meta-O-methyltransferase from cell suspension cultures of parsley and its relation to flavonoid biosynthesis". Biochim. Biophys. Acta. 268 (2): 313–26. doi:10.1016/0005-2744(72)90326-9. PMID 5026305.


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