Valin N-monooksigenaza
| Valin N-monooksigenaza | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Identifikatori | |||||||||
| EC broj | 1.14.13.118 | ||||||||
| Baze podataka | |||||||||
| IntEnz | IntEnz pregled | ||||||||
| BRENDA | BRENDA pristup | ||||||||
| ExPASy | NiceZyme pregled | ||||||||
| KEGG | KEGG pristup | ||||||||
| MetaCyc | metabolički put | ||||||||
| PRIAM | profil | ||||||||
| Strukture PBP | RCSB PDB PDBe PDBj PDBsum | ||||||||
| |||||||||
Valin N-monooksigenaza (EC 1.14.13.118, CYP79D1, CYP79D2) je enzim sa sistematskim imenom L-valin,NADPH:kiseonik oksidoreduktaza (N-hidroksilacija).[1][2] Ovaj enzim katalizuje sledeću hemijsku reakciju
- L-valin + 2 O2 + 2 NADPH + 2 H+ (E)-2-metilpropanal oksim + 2 NADP+ + CO2 + 3H2O (sveukupna reakcija)
- (1a) L-valin + O2 + NADPH + H+ N-hidroksi-L-valin + NADP+ + H2O
- (1b) N-hidroksi-L-valin + O2 + NADPH + H+ N,N-dihidroksi-L-valin + NADP+ + H2O
- (1c) N,N-dihidroksi-L-valin (E)-2-metilpropanal oksim + CO2 + H2O (spontaneous)
Ovaj enzim je hem-tiolatni protein (P-450). On katalizuje dve sukcesivne N-hidroksilacije L-valina.
Reference[уреди | уреди извор]
- ^ Andersen, M.D., Busk, P.K., Svendsen, I. and Moller, B.L. (2000). „Cytochromes P-450 from cassava (Manihot esculenta Crantz) catalyzing the first steps in the biosynthesis of the cyanogenic glucosides linamarin and lotaustralin. Cloning, functional expression in Pichia pastoris, and substrate specificity of the isolated recombinant enzymes”. J. Biol. Chem. 275: 1966—1975. PMID 10636899.
- ^ Forslund, K., Morant, M., Jorgensen, B., Olsen, C.E., Asamizu, E., Sato, S., Tabata, S. and Bak, S. (2004). „Biosynthesis of the nitrile glucosides rhodiocyanoside A and D and the cyanogenic glucosides lotaustralin and linamarin in Lotus japonicus”. Plant Physiol. 135: 71—84. PMID 15122013.
Literatura[уреди | уреди извор]
- Nicholas C. Price; Lewis Stevens (1999). Fundamentals of Enzymology: The Cell and Molecular Biology of Catalytic Proteins (Third изд.). USA: Oxford University Press. ISBN 019850229X.
- Eric J. Toone (2006). Advances in Enzymology and Related Areas of Molecular Biology, Protein Evolution (Volume 75 изд.). Wiley-Interscience. ISBN 0471205036.
- Branden C; Tooze J. Introduction to Protein Structure. New York, NY: Garland Publishing. ISBN 0-8153-2305-0.
- Irwin H. Segel. Enzyme Kinetics: Behavior and Analysis of Rapid Equilibrium and Steady-State Enzyme Systems (Book 44 изд.). Wiley Classics Library. ISBN 0471303097.
- William P. Jencks (1987). Catalysis in Chemistry and Enzymology. Dover Publications. ISBN 0486654605.
Spoljašnje veze[уреди | уреди извор]
- Valine+N-monooxygenase на US National Library of Medicine Medical Subject Headings (MeSH)
