ExplorEnz: EC 2.1.1.42

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2.1.1.42

Accepted name:

flavone 3′-O-methyltransferase

Reaction:

S-adenosyl-L-methionine + 3′-hydroxyflavone = S-adenosyl-L-homocysteine + 3′-methoxyflavone

For diagram of luteolin biosynthesis click here

Other name(s):

o-dihydric phenol methyltransferase; luteolin methyltransferase; luteolin 3′-O-methyltransferase; o-diphenol m-O-methyltransferase; o-dihydric phenol meta-O-methyltransferase; S-adenosylmethionine:flavone/flavonol 3′-O-methyltransferase; quercetin 3′-O-methyltransferase

Systematic name:

S-adenosyl-L-methionine:3′-hydroxyflavone 3′-O-methyltransferase

Comments:

The enzyme prefers flavones with vicinal 3′,4′-dihydroxyl groups.

Links to other databases:

BRENDA, EXPASY, KEGG, MetaCyc, CAS registry number: 37205-55-3

References:

1.	Ebel, J., Hahlbrock, K. and Grisebach, H. 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 (1972) 313–326. [DOI] [PMID: 5026305]
2.	Muzac, I., Wang, J., Anzellotti, D., Zhang, H. and Ibrahim, R.K. Functional expression of an Arabidopsis cDNA clone encoding a flavonol 3′-O-methyltransferase and characterization of the gene product. Arch. Biochem. Biophys. 375 (2000) 385–388. [DOI] [PMID: 10700397]
3.	Poulton, J.E., Hahlbrock, K. and Grisebach, H. O-Methylation of flavonoid substrates by a partially purified enzyme from soybean cell suspension cultures. Arch. Biochem. Biophys. 180 (1977) 543–549. [DOI] [PMID: 18099]
4.	Kim, B.G., Lee, H.J., Park, Y., Lim, Y. and Ahn, J.H. Characterization of an O-methyltransferase from soybean. Plant Physiol. Biochem. 44 (2006) 236–241. [DOI] [PMID: 16777424]
5.	Lee, Y.J., Kim, B.G., Chong, Y., Lim, Y. and Ahn, J.H. Cation dependent O-methyltransferases from rice. Planta 227 (2008) 641–647. [DOI] [PMID: 17943312]

[EC 2.1.1.42 created 1976, modified 2011]