Chlorophyll(ide) b reductase (EC 1.1.1.294), chlorophyll b reductase, Chl b reductase) is an enzyme with systematic name 71-hydroxychlorophyllide-a:NAD(P)+ oxidoreductase.[1][2][3][4][5] This enzyme catalyses the following chemical reaction
| Chlorophyll(ide) b reductase | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Identifiers | |||||||||
| EC no. | 1.1.1.294 | ||||||||
| Databases | |||||||||
| IntEnz | IntEnz view | ||||||||
| BRENDA | BRENDA entry | ||||||||
| ExPASy | NiceZyme view | ||||||||
| KEGG | KEGG entry | ||||||||
| MetaCyc | metabolic pathway | ||||||||
| PRIAM | profile | ||||||||
| PDB structures | RCSB PDB PDBe PDBsum | ||||||||
| |||||||||
- 71-hydroxychlorophyllide a + NAD(P)+ chlorophyllide b + NAD(P)H + H+
This enzyme carries out the first step in the conversion of chlorophyll b to chlorophyll a. It is involved in chlorophyll degradation, which occurs during leaf senescence, and it also forms part of the chlorophyll cycle, which interconverts chlorophyll a and b in response to changing light conditions.
References
edit- ^ Scheumann V, Ito H, Tanaka A, Schoch S, Rüdiger W (November 1996). "Substrate specificity of chlorophyll(ide) b reductase in etioplasts of barley (Hordeum vulgare L.)". European Journal of Biochemistry. 242 (1): 163–70. doi:10.1111/j.1432-1033.1996.0163r.x. PMID 8954166.
- ^ Scheumann V, Schoch S, Rüdiger W (December 1998). "Chlorophyll a formation in the chlorophyll b reductase reaction requires reduced ferredoxin". The Journal of Biological Chemistry. 273 (52): 35102–8. doi:10.1074/jbc.273.52.35102. PMID 9857045.
- ^ Hörtensteiner S (2006). "Chlorophyll degradation during senescence". Annual Review of Plant Biology. 57: 55–77. doi:10.1146/annurev.arplant.57.032905.105212. PMID 16669755.
- ^ Ito H, Ohtsuka T, Tanaka A (January 1996). "Conversion of chlorophyll b to chlorophyll a via 7-hydroxymethyl chlorophyll". The Journal of Biological Chemistry. 271 (3): 1475–9. doi:10.1074/jbc.271.3.1475. PMID 8576141.
- ^ Rüdiger W (2002). "Biosynthesis of chlorophyll b and the chlorophyll cycle". Photosynthesis Research. 74 (2): 187–93. doi:10.1023/A:1020959610952. PMID 16228557.
External links
edit- Chlorophyll(ide)+b+reductase at the U.S. National Library of Medicine Medical Subject Headings (MeSH)
