Violaksantin deepoksidaza
Izgled
Violaksantin deepoksidaza | |||||||||
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Identifikatori | |||||||||
EC broj | 1.10.99.3 | ||||||||
CAS broj | 57534-73-3 | ||||||||
IntEnz | IntEnz view | ||||||||
BRENDA | BRENDA entry | ||||||||
ExPASy | NiceZyme view | ||||||||
KEGG | KEGG entry | ||||||||
MetaCyc | metabolic pathway | ||||||||
PRIAM | profile | ||||||||
PDB | RCSB PDB PDBe PDBj PDBsum | ||||||||
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Violaksantin deepoksidaza (EC 1.10.99.3, VDE) je enzim sa sistematskim imenom violaksantin:askorbat oksidoreduktaza.[1][2][3][4][5][6][7] Ovaj enzim katalizuje sledeću hemijsku reakciju
- violaksantin + 2 L-askorbat zeaksantin + 2 L-dehidroaskorbat + 2H2O (sveukupna reakcija)
- (1a) violaksantin + L-askorbat anteraksantin + L-dehidroaskorbat + H2O
- (1b) antheraksantin + L-askorbat zeaksantin + L-dehidroaskorbat + H2O
Zajedno sa EC 1.14.13.90, zeaksantinskom epoksidazom, ovaj enzim formira deo ksantofilnog (ili violaksantinskog) ciklusa za kontrolu koncentracije zeaksantina u hloroplastima.
- ↑ Yamamoto, H.Y. and Higashi, R.M. (1978). „Violaxanthin de-epoxidase. Lipid composition and substrate specificity”. Arch. Biochem. Biophys. 190: 514-522. PMID 102251.
- ↑ Rockholm, D.C. and Yamamoto, H.Y. (1996). „Violaxanthin de-epoxidase”. Plant Physiol. 110: 697-703. PMID 8742341.
- ↑ 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.
- ↑ Kuwabara, T., Hasegawa, M., Kawano, M. and Takaichi, S. (1999). „Characterization of violaxanthin de-epoxidase purified in the presence of Tween 20: effects of dithiothreitol and pepstatin A”. Plant Cell Physiol. 40: 1119-1126. PMID 10635115.
- ↑ Latowski, D., Kruk, J., Burda, K., Skrzynecka-Jaskierm, M., Kostecka-Gugala, A. and Strzalka, K. (2002). „Kinetics of violaxanthin de-epoxidation by violaxanthin de-epoxidase, a xanthophyll cycle enzyme, is regulated by membrane fluidity in model lipid bilayers”. Eur. J. Biochem. 269: 4656-4665. PMID 12230579.
- ↑ Goss, R. (2003). „Substrate specificity of the violaxanthin de-epoxidase of the primitive green alga Mantoniella squamata (Prasinophyceae)”. Planta 217: 801-812. PMID 12748855.
- ↑ Latowski, D., Akerlund, H.E. and Strzalka, K. (2004). „Violaxanthin de-epoxidase, the xanthophyll cycle enzyme, requires lipid inverted hexagonal structures for its activity”. Biochemistry 43: 4417-4420. PMID 15078086.
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