ゼアキサンチンエポキシダーゼ
ゼアキサンチンエポキシダーゼ(zeaxanthin epoxidase)は、カロテノイド生合成酵素の一つで、次の化学反応を触媒する酸化還元酵素である。
- (1a) ゼアキサンチン + NAD(P)H + H+ + O2 アンテラキサンチン + NAD(P)+ + H2O
- (1b) アンテラキサンチン + NAD(P)H + H+ + O2 ビオラキサンチン + NAD(P)+ + H2O
反応式の通りゼアキサンチンがビオラキサンチンまで酸化される。
組織名はzeaxanthin,NAD(P)H:oxygen oxidoreductaseで、別名にZea-epoxidaseがある。
参考文献
編集- Buch, K., Stransky, H. and Hager, A. (1995). “FAD is a further essential cofactor of the NAD(P)H and O2-dependent zeaxanthin-epoxidase.”. FEBS Lett. 376: 45-48. PMID 8521963.
- Bugos, R.C., Hieber, A.D. and Yamamoto, H.Y. (1998). “Xanthophyll cycle enzymes are members of the lipocalin family, the first identified from plants.”. J. Biol. Chem. 273: 15321-15324. PMID 9624110.
- Thompson, A.J., Jackson, A.C., Parker, R.A., Morpeth, D.R., Burbidge, A. and Taylor, I.B. (2000). “Abscisic acid biosynthesis in tomato: regulation of zeaxanthin epoxidase and 9-cis-epoxycarotenoid dioxygenase mRNAs by light/dark cycles, water stress and abscisic acid.”. Plant Mol. Biol. 42: 833-845. PMID 10890531.
- Hieber, A.D., Bugos, R.C. and Yamamoto, H.Y. (2000). “Plant lipocalins: violaxanthin de-epoxidase and zeaxanthin epoxidase.”. Biochim. Biophys. Acta 1482: 84-91. PMID 11058750.
- Frommolt, R., Goss, R. and Wilhelm, C. (2001). “The de-epoxidase and epoxidase reactions of Mantoniella squamata (Prasinophyceae) exhibit different substrate-specific reaction kinetics compared to spinach.”. Planta 213: 446-456. PMID 11506368.
- Frommolt, R., Goss, R. and Wilhelm, C. (2001). “Erratum Report. The de-epoxidase and epoxidase reactions of Mantoniella squamata (Prasinophyceae) exhibit different substrate-specific reaction kinetics compared to spinach.”. Planta 213: 492. PMID 11506368.
- Matsubara, S., Morosinotto, T., Bassi, R., Christian, A.L., Fischer-Schliebs, E., Luttge, U., Orthen, B., Franco, A.C., Scarano, F.R., Forster, B., Pogson, B.J. and Osmond, C.B. (2003). “Occurrence of the lutein-epoxide cycle in mistletoes of the Loranthaceae and Viscaceae.”. Planta 217: 868-879. PMID 12844265.