Chlorophyllide-a oxygenase
| Chlorophyllide-a oxygenase | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Identifiers | |||||||||
| EC number | 1.14.13.122 | ||||||||
| CAS number | 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 | ||||||||
| |||||||||
Chlorophyllide-a oxygenase (EC 1.14.13.122, chlorophyllide a oxygenase, chlorophyll-b synthase, CAO) is an enzyme with systematic 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.; 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. doi:10.1073/pnas.96.18.10507. PMC 17919
. PMID 10468639. - ↑ Oster, U.; Tanaka, R.; Tanaka, A.; 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 (3): 305–310. doi:10.1046/j.1365-313x.2000.00672.x. PMID 10758481.
- ↑ Eggink, L.L.; LoBrutto, R.; Brune, D.C.; Brusslan, J.; Yamasato, A.; Tanaka, A.; 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. doi:10.1186/1471-2229-4-5. PMC 406501. PMID 15086960.
- ↑ Porra, R.J.; Schafer, W.; Cmiel, E.; Katheder, I.; 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 (1-2): 671–679. doi:10.1111/j.1432-1033.1994.tb19983.x. PMID 8307032.
External links
- Chlorophyllide-a oxygenase at the US National Library of Medicine Medical Subject Headings (MeSH)
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