Chlorophyllide-a oxygenase
Appearance
Chlorophyllide-a oxygenase | |||||||||
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Identifiers | |||||||||
EC no. | 1.13.12.14 | ||||||||
CAS no. | 216503-73-0 | ||||||||
Databases | |||||||||
IntEnz | IntEnz view | ||||||||
BRENDA | BRENDA entry | ||||||||
ExPASy | NiceZyme view | ||||||||
KEGG | KEGG entry | ||||||||
MetaCyc | metabolic pathway | ||||||||
PRIAM | profile | ||||||||
PDB structures | RCSB PDB PDBe PDBsum | ||||||||
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Chlorophyllide-a oxygenase (EC 1.13.12.14, chlorophyllide a oxygenase, cholorophyll-b synthase, CAO) is an enzyme with system name chlorophyllide-a:oxygen 7-oxidoreductase.[1][2][3][4] This enzyme catalyses the following chemical reaction
- (1) chlorophyllide a + O2 + NADPH + H+ 7-hydroxychlorophyllide a + H2O + NADP+
- (2) 7-hydroxychlorophyllide a + O2 + NADPH + H+ chlorophyllide b + 2 H2O + NADP+
This enzyme contains a mononuclear iron centre.
References
- ^ 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.
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: CS1 maint: multiple names: authors list (link) - ^ 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.
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: CS1 maint: multiple names: authors list (link) - ^ 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.
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: CS1 maint: multiple names: authors list (link) - ^ 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.
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: CS1 maint: multiple names: authors list (link)
External links
- Chlorophyllide-a+oxygenase at the U.S. National Library of Medicine Medical Subject Headings (MeSH)