Hlorofil(id) b reduktaza

Pretraga
PMC	članci
PubMed	članci
NCBI	proteini

Hlorofil(id) b reduktaza
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
PMC
Pretraga
PMC	članci
PubMed	članci
NCBI	proteini

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

71-hidroksihlorofilid a + NAD(P)+

\rightleftharpoons

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

^ 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

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

Chlorophyll(ide)+b+reductase на US National Library of Medicine Medical Subject Headings (MeSH)

[1] 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.

[2] 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.

[3] Hörtensteiner, S. (2006). „Chlorophyll degradation during senescence”. Annu. Rev. Plant Biol. 57: 55—77. PMID 16669755.

[4] 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.

[5] Rüdiger, W. (2002). „Biosynthesis of chlorophyll b and the chlorophyll cycle”. Photosynth. Res. 74: 187—193. PMID 16228557.

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