| EC |
1.1.1.294 |
| Accepted name: |
chlorophyll(ide) b reductase |
| Reaction: |
71-hydroxychlorophyllide a + NAD(P)+ = chlorophyllide b + NAD(P)H + H+ |
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For diagram of the chlorophyll cycle, click here |
| Other name(s): |
chlorophyll b reductase; Chl b reductase |
| Systematic name: |
71-hydroxychlorophyllide-a:NAD(P)+ oxidoreductase |
| Comments: |
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 [3] and it also forms part of the chlorophyll cycle, which interconverts chlorophyll a and b in response to changing light conditions [4,5]. |
| Links to other databases: |
BRENDA, EXPASY, Gene, KEGG, MetaCyc |
| References: |
| 1. |
Scheumann, V., Ito, H., Tanaka, A., Schoch, S. and Rüdiger, W. Substrate specificity of chlorophyll(ide) b reductase in etioplasts of barley (Hordeum vulgare L.). Eur. J. Biochem. 242 (1996) 163–170. [DOI] [PMID: 8954166] |
| 2. |
Scheumann, V., Schoch, S. and Rüdiger, W. Chlorophyll a formation in the chlorophyll b reductase reaction requires reduced ferredoxin. J. Biol. Chem. 273 (1998) 35102–35108. [DOI] [PMID: 9857045] |
| 3. |
Hörtensteiner, S. Chlorophyll degradation during senescence. Annu. Rev. Plant Biol. 57 (2006) 55–77. [DOI] [PMID: 16669755] |
| 4. |
Ito, H., Ohtsuka, T. and Tanaka, A. Conversion of chlorophyll b to chlorophyll a via 7-hydroxymethyl chlorophyll. J. Biol. Chem. 271 (1996) 1475–1479. [DOI] [PMID: 8576141] |
| 5. |
Rüdiger, W. Biosynthesis of chlorophyll b and the chlorophyll cycle. Photosynth. Res. 74 (2002) 187–193. [DOI] [PMID: 16228557] |
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| [EC 1.1.1.294 created 2007] |
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