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Literature summary for 1.3.1.5 extracted from

  • Schabort, J.C.; Teijema, H.J.
    The role of cucurbitacin DELTA23-reductase in the breakdown pathway of toxic bitter principles in Cucurbita maxima (1968), Phytochemistry, 7, 2107-2110.
No PubMed abstract available

Organism

Organism UniProt Comment Textmining
Cucurbita maxima
-
var. Green Hubbard
-

Reaction

Reaction Comment Organism Reaction ID
23,24-dihydrocucurbitacin B + NAD(P)+ = cucurbitacin B + NAD(P)H + H+ plant terpenoid Cucurbita maxima

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
cucurbitacin A + NAD(P)H very low activity Cucurbita maxima 23,24-dihydrocucurbitacin A + NAD(P)+
-
?
cucurbitacin B + NAD(P)H + H+ NADPH better electron donor than NADH, reduction is fairly irreversible, approx. 75% of activity with cucurbitacin E beta-D-glucoside Cucurbita maxima 23,24-dihydrocucurbitacin B + NAD(P)+
-
ir
cucurbitacin C + NAD(P)H very low activity Cucurbita maxima 23,24-dihydrocucurbitacin C + NAD(P)+
-
?
cucurbitacin D + NAD(P)H low activity Cucurbita maxima 23,24-dihydrocucurbitacin D + NAD(P)+
-
?
cucurbitacin E + NAD(P)H low activity Cucurbita maxima 23,24-dihydrocucurbitacin E + NAD(P)+
-
?
cucurbitacin E beta-D-glucoside + NAD(P)H best substrate Cucurbita maxima 23,24-dihydrocucurbitacin E beta-D-glucoside + NAD(P)+
-
?
cucurbitacin F + NAD(P)H very low activity Cucurbita maxima 23,24-dihydrocucurbitacin F + NAD(P)+
-
?

Cofactor

Cofactor Comment Organism Structure
NAD(P)+
-
Cucurbita maxima