Naringenin 7-O-methyltransferase

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Naringenin 7-O-methyltransferase
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EC no. 2.1.1.232
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Naringenin 7-O-methyltransferase (EC 2.1.1.232, NOMT) (full systematic name S-adenosyl-L-methionine:(2S)-5,7,4'-trihydroxyflavanone 7-O-methyltransferase) is a methyltransferase isolated from rice, which catalyzes the biosynthesis of sakuranetin. [1]

This enzyme catalyses the following chemical reaction:

S-adenosyl-L-methionine + (2S)-naringenin S-adenosyl-L-homocysteine + (2S)-sakuranetin

While the enzyme is not present in healthy rice leaves, it can be induced by treatment with ultraviolet radiation, jasmonic acid and copper chloride. [1]

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<span class="mw-page-title-main">Sakuranetin</span> Chemical compound

Sakuranetin is a flavan-on, the 7-methoxy derivative of naringenin, found in Polymnia fruticosa and rice, where it acts as a phytoalexin against spore germination of Pyricularia oryzae.

5-hydroxyfuranocoumarin 5-O-methyltransferase is an enzyme with systematic name S-adenosyl-L-methionine:5-hydroxyfurocoumarin 5-O-methyltransferase. This enzyme catalyses the following chemical reaction

8-hydroxyfuranocoumarin 8-O-methyltransferase is an enzyme with systematic name S-adenosyl-L-methionine:8-hydroxyfurocoumarin 8-O-methyltransferase. This enzyme catalyses the following chemical reaction

Flavonoid 4'-O-methyltransferase is an enzyme with systematic name S-adenosyl-L-methionine:flavonoid 4'-O-methyltransferase. This enzyme catalyses the following chemical reaction

Trans-resveratrol di-O-methyltransferase is an enzyme with systematic name S-adenosyl-L-methionine:trans-resveratrol 3,5-O-dimethyltransferase. This enzyme catalyses the following chemical reaction

References

  1. 1 2 Rakwal R, Agrawal GK, Yonekura M, Kodama O (June 2000). "Naringenin 7-O-methyltransferase involved in the biosynthesis of the flavanone phytoalexin sakuranetin from rice (Oryza sativa L.)". Plant Science. 155 (2): 213–221. doi:10.1016/s0168-9452(00)00223-5. PMID   10814825.
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