Hlorofilid-a oksigenaza

Pretraga
PMC	članci
PubMed	članci
NCBI	proteini

Hlorofilid-a oksigenaza
Hlorofilid-a oksigenaza
Identifikatori
EC broj	1.14.13.122
CAS broj	216503-73-0
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
PMC
Pretraga
PMC	članci
PubMed	članci
NCBI	proteini

Hlorofilid-a oksigenaza (EC 1.14.13.122, hlorofilid a oksigenaza, hlorofil-b sintaza, CAO) je enzim sa sistematskim imenom hlorofilid-a:kiseonik 7-oksidoreduktaza.^[1]^[2]^[3]^[4] Ovaj enzim katalizuje sledeću hemijsku reakciju

(1) hlorofilid a + O₂ + NADPH + H⁺

\rightleftharpoons

7-hidroksihlorofilid a +H₂O + NADP⁺

(2) 7-hidroksihlorofilid a + O₂ + NADPH + H⁺

\rightleftharpoons

hlorofilid b + 2H₂O + NADP⁺

Hlorofil b je neophodan za formiranje stabilnog kompleksa ubiranja svetlosti kod hloroplastnih zelenih algi, cijanobakterija i biljki.

Reference

^ Espineda, C.E., Linford, A.S., Devine, D. and Brusslan, J.A. (1999). „The AtCAO gene, encoding chlorophyll a oxygenase, is required for chlorophyll b synthesis in Arabidopsis thaliana”. Proc. Natl. Acad. Sci. USA. 96: 10507—10511. PMID 10468639.
^ Oster, U., Tanaka, R., Tanaka, A. and Rüdiger, W. (2000). „Cloning and functional expression of the gene encoding the key enzyme for chlorophyll b biosynthesis (CAO) from Arabidopsis thaliana”. Plant J. 21: 305—310. PMID 10758481.
^ Eggink, L.L., LoBrutto, R., Brune, D.C., Brusslan, J., Yamasato, A., Tanaka, A. and Hoober, J.K. (2004). „Synthesis of chlorophyll b: localization of chlorophyllide a oxygenase and discovery of a stable radical in the catalytic subunit”. BMC Plant Biol. 4: 5—5. PMID 15086960.
^ Porra, R.J., Schafer, W., Cmiel, E., Katheder, I. and Scheer, H. (1994). „The derivation of the formyl-group oxygen of chlorophyll b in higher plants from molecular oxygen. Achievement of high enrichment of the 7-formyl-group oxygen from ¹⁸O₂ in greening maize leaves”. Eur. J. Biochem. 219: 671—679. PMID 8307032.

Literatura

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.

Spoljašnje veze

Chlorophyllide-a+oxygenase на US National Library of Medicine Medical Subject Headings (MeSH)

[1] Espineda, C.E., Linford, A.S., Devine, D. and Brusslan, J.A. (1999). „The AtCAO gene, encoding chlorophyll a oxygenase, is required for chlorophyll b synthesis in Arabidopsis thaliana”. Proc. Natl. Acad. Sci. USA. 96: 10507—10511. PMID 10468639.

[2] Oster, U., Tanaka, R., Tanaka, A. and Rüdiger, W. (2000). „Cloning and functional expression of the gene encoding the key enzyme for chlorophyll b biosynthesis (CAO) from Arabidopsis thaliana”. Plant J. 21: 305—310. PMID 10758481.

[3] Eggink, L.L., LoBrutto, R., Brune, D.C., Brusslan, J., Yamasato, A., Tanaka, A. and Hoober, J.K. (2004). „Synthesis of chlorophyll b: localization of chlorophyllide a oxygenase and discovery of a stable radical in the catalytic subunit”. BMC Plant Biol. 4: 5—5. PMID 15086960.

[4] Porra, R.J., Schafer, W., Cmiel, E., Katheder, I. and Scheer, H. (1994). „The derivation of the formyl-group oxygen of chlorophyll b in higher plants from molecular oxygen. Achievement of high enrichment of the 7-formyl-group oxygen from ¹⁸O₂ in greening maize leaves”. Eur. J. Biochem. 219: 671—679. PMID 8307032.

[1]

[2]

[3]

[4]

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Hlorofilid-a oksigenaza

Reference

Literatura

Spoljašnje veze

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