1.14.13.101: senecionine N-oxygenase
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For detailed information about senecionine N-oxygenase, go to the full flat file.
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Synonyms
flavin-dependent monooxygenase, fmoa, GgPNO, oxygenase, senecionine N-, PA N-oxygenase, PNO, pyrrolizidine alkaloid N-oxygenase, senecionine monooxygenase (N-oxide-forming), senecionine N-oxygenase, SNO, TjSNO, ZvFMOa, ZvPNO
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Systematic Name
Systematic Name on EC 1.14.13.101 - senecionine N-oxygenase
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senecionine,NADPH:oxygen oxidoreductase (N-oxide-forming)
A flavoprotein. NADH cannot replace NADPH. While pyrrolizidine alkaloids of the senecionine and monocrotaline types are generally good substrates (e.g. senecionine, retrorsine and monocrotaline), the enzyme does not use ester alkaloids lacking an hydroxy group at C-7 (e.g. supinine and phalaenopsine), 1,2-dihydro-alkaloids (e.g. sarracine) or unesterified necine bases (e.g. senkirkine) as substrates [1]. Senecionine N-oxide is used by insects as a chemical defense: senecionine N-oxide is non-toxic, but it is bioactivated to a toxic form by the action of cytochrome P-450 oxidase when absorbed by insectivores.