| 英文名 |
chlorophyll(ide) b reductase |
| Example Structure |
 |
| 别名 |
CBR, Chl b reductase, chlorophyll b reductase, chlorophyll(ide) b reductase, More, NOL, NON-YELLOW COLORING 1, NON-YELLOW COLORING1, NYC-like, NYC1, NYC1-LIKE |
| EC Number |
1.1.1.294 |
| CAS编号 |
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| 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 [3,4] and it also forms part of the chlorophyll cycle, which interconverts chlorophyll a and b in response to changing light conditions [5,6]. While both chlorophyll a and chlorophyll b are found in higher plants, only breakdown products derived from chlorophyll a are found in the end products, i.e. non-fluorescent chlorophyll catabolites (NCCs). The transition from chlorophyll b, which contains a formyl group on C7, to chlorophyll a, which contains a methyl group on C7, proceeds through the intermediate 71-hydroxychlorophyll [1]. Another enzyme, which requires ferredoxin but has not been characterized fully, is required to complete the conversion [3]. |
| Cofactor |
|
| History |
|
| Reactions |
7(1)-hydroxychlorophyllide a + NAD(P)(+) = chlorophyllide b + NAD(P)H. |
