Hlorofil(id) b reduktaza
Hlorofil(id) b reduktaza (EC 1.1.1.294, hlorofila b reduktaza, Chl b reduktaza) je enzim sa sistematskim imenom 71-hidroksihlorofillid-a:NAD(P)+ oksidoreduktaza.[1][2][3][4][5] Ovaj enzim katalizuje sledeću hemijsku reakciju
| Hlorofil(id) b reduktaza | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Identifikatori | |||||||||
| EC broj | 1.1.1.294 | ||||||||
| 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 | ||||||||
| |||||||||
- 71-hidroksihlorofilid a + NAD(P)+ hlorofilid b + NAD(P)H + H+
Ovaj enzim izvršava prvi korak konverzije hlorofila b u hlorofil a. On učestvuje u hlorofilskoj degradaciji, do koje dolazi tokom starenja lišća. On takođe sačinjava deo hlorofilnog ciklusa, kojim se interkonvertuju hlorofil a i b u responsu na promenu svetlosnih uslova.
Reference
уреди- ^ Scheumann, V., Ito, H., Tanaka, A., Schoch, S. and Rüdiger, W. (1996). „Substrate specificity of chlorophyll(ide) b reductase in etioplasts of barley (Hordeum vulgare L.)”. Eur. J. Biochem. 242: 163—170. PMID 8954166.
- ^ Scheumann, V., Schoch, S. and Rüdiger, W. (1998). „Chlorophyll a formation in the chlorophyll b reductase reaction requires reduced ferredoxin”. J. Biol. Chem. 273: 35102—35108. PMID 9857045.
- ^ Hörtensteiner, S. (2006). „Chlorophyll degradation during senescence”. Annu. Rev. Plant Biol. 57: 55—77. PMID 16669755.
- ^ Ito, H., Ohtsuka, T. and Tanaka, A. (1996). „Conversion of chlorophyll b to chlorophyll a via 7-hydroxymethyl chlorophyll”. J. Biol. Chem. 271: 1475—1479. PMID 8576141.
- ^ Rüdiger, W. (2002). „Biosynthesis of chlorophyll b and the chlorophyll cycle”. Photosynth. Res. 74: 187—193. PMID 16228557.
Literatura
уреди- 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- Chlorophyll(ide)+b+reductase на US National Library of Medicine Medical Subject Headings (MeSH)
