Chlorophyllide-a oxygenase: Difference between revisions
Content deleted Content added
No edit summary |
No edit summary |
||
| Line 9: | Line 9: | ||
| caption = |
| caption = |
||
}} |
}} |
||
'''Chlorophyllide-a oxygenase''' ({{EC number|1.13. |
'''Chlorophyllide-a oxygenase''' ({{EC number|1.14.13.122}}, ''chlorophyllide a oxygenase'', ''cholorophyll-b synthase'', ''CAO'') is an [[enzyme]] with system name ''chlorophyllide-a:oxygen 7-oxidoreductase''.<ref>{{cite journal | title = The <em>AtCAO</em> gene, encoding chlorophyll <em>a</em> oxygenase, is required for chlorophyll <em>b</em> synthesis in <em>Arabidopsis thaliana</em> |author = Espineda, C.E., Linford, A.S., Devine, D. and Brusslan, J.A. |journal = Proc. Natl. Acad. Sci. USA |date = 1999 |volume = 96 |pages = 10507-10511 |pmid = 10468639}}</ref><ref>{{cite journal | title = Cloning and functional expression of the gene encoding the key enzyme for chlorophyll <em>b</em> biosynthesis (CAO) from <em>Arabidopsis thaliana</em> |author = Oster, U., Tanaka, R., Tanaka, A. and Rüdiger, W. |journal = Plant J. |date = 2000 |volume = 21 |pages = 305-310 |pmid = 10758481}}</ref><ref>{{cite journal | title = Synthesis of chlorophyll <em>b</em>: localization of chlorophyllide <em>a</em> oxygenase and discovery of a stable radical in the catalytic subunit |author = Eggink, L.L., LoBrutto, R., Brune, D.C., Brusslan, J., Yamasato, A., Tanaka, A. and Hoober, J.K. |journal = BMC Plant Biol. |date = 2004 |volume = 4 |pages = 5-5 |pmid = 15086960}}</ref><ref>{{cite journal | title = The derivation of the formyl-group oxygen of chlorophyll <em>b</em> in higher plants from molecular oxygen. Achievement of high enrichment of the 7-formyl-group oxygen from <small><sup>18</sup></small>O<small><sub>2</sub></small> in greening maize leaves |author = Porra, R.J., Schafer, W., Cmiel, E., Katheder, I. and Scheer, H. |journal = Eur. J. Biochem. |date = 1994 |volume = 219 |pages = 671-679 |pmid = 8307032}}</ref> This enzyme [[catalysis|catalyses]] the following [[chemical reaction]] |
||
: (1) [[chlorophyllide a]] + O<sub>2</sub> + NADPH + H<sup>+</sup> <math>\rightleftharpoons</math> 7-hydroxychlorophyllide a + H<sub>2</sub>O + NADP<sup>+</sup> |
: (1) [[chlorophyllide a]] + O<sub>2</sub> + NADPH + H<sup>+</sup> <math>\rightleftharpoons</math> 7-hydroxychlorophyllide a + H<sub>2</sub>O + NADP<sup>+</sup> |
||
Revision as of 23:42, 30 January 2013
| Chlorophyllide-a oxygenase | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Identifiers | |||||||||
| EC no. | 1.14.13.122 | ||||||||
| 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 | ||||||||
| |||||||||
Chlorophyllide-a oxygenase (EC 1.14.13.122, 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.
{{cite journal}}: 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.
{{cite journal}}: 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.
{{cite journal}}: 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.
{{cite journal}}: CS1 maint: multiple names: authors list (link)
External links
- Chlorophyllide-a+oxygenase at the U.S. National Library of Medicine Medical Subject Headings (MeSH)