KEGG   ENZYME: 1.1.1.294Help
Entry
EC 1.1.1.294                Enzyme                                 

Name
chlorophyll(ide) b reductase;
chlorophyll b reductase;
Chl b reductase
Class
Oxidoreductases;
Acting on the CH-OH group of donors;
With NAD+ or NADP+ as acceptor
BRITE hierarchy
Sysname
71-hydroxychlorophyllide-a:NAD(P)+ oxidoreductase
Reaction(IUBMB)
71-hydroxychlorophyllide a + NAD(P)+ = chlorophyllide b + NAD(P)H + H+ [RN:R08914 R08915]
Reaction(KEGG)
Substrate
71-hydroxychlorophyllide a;
NAD+ [CPD:C00003];
NADP+ [CPD:C00006]
Product
chlorophyllide b [CPD:C16541];
NADH [CPD:C00004];
NADPH [CPD:C00005];
H+ [CPD:C00080]
Comment
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].
History
EC 1.1.1.294 created 2007
Pathway
ec00860  Porphyrin and chlorophyll metabolism
ec01100  Metabolic pathways
ec01110  Biosynthesis of secondary metabolites
Orthology
K13606  chlorophyll(ide) b reductase
Genes
ATH: AT4G13250(NYC1) AT5G04900(NOL)
ALY: ARALYDRAFT_487276 ARALYDRAFT_497065
CRB: 17879926 17884253 17886399
CSAT: 104708623 104719138 104723940 104732461 104734497 104768686
EUS: EUTSA_v10013856mg EUTSA_v10024970mg
BRP: 103833353 103855594 103863639
BNA: 106358543 106368659 106382994 106415430 106423622 106428218 106445559 106445844
BOE: 106307162 106332965 106341846
THJ: 104808765 104816482
CPAP: 110818577
GMX: 100784978(NYC1_1) 100797007(NYC1_2) 100797874
LJA: Lj0g3v0004249.1(Lj0g3v0004249.1) Lj0g3v0004249.2(Lj0g3v0004249.2) Lj2g3v0783700.1(Lj2g3v0783700.1) Lj2g3v0783700.2(Lj2g3v0783700.2)
CSV: 101212226 101222986(CsSDR)
OSA: 4327178
DOSA: Os01t0227100-01(Os01g0227100)
OBR: 102721502
ATS: 109737640(LOC109737640) 109738832(LOC109738832) 109754924(LOC109754924) 109766768(LOC109766768)
ZMA: 100280491 100281115(gpm587)
MNG: MNEG_2106
 » show all
Taxonomy
Reference
1  [PMID:8954166]
  Authors
Scheumann V, Ito H, Tanaka A, Schoch S, Rudiger W.
  Title
Substrate specificity of chlorophyll(ide) b reductase in etioplasts of barley (Hordeum vulgare L.).
  Journal
Eur J Biochem 242:163-70 (1996)
DOI:10.1111/j.1432-1033.1996.0163r.x
Reference
2  [PMID:9857045]
  Authors
Scheumann V, Schoch S, Rudiger W.
  Title
Chlorophyll a formation in the chlorophyll b reductase reaction requires reduced ferredoxin.
  Journal
J Biol Chem 273:35102-8 (1998)
DOI:10.1074/jbc.273.52.35102
Reference
3  [PMID:16669755]
  Authors
Hortensteiner S.
  Title
Chlorophyll degradation during senescence.
  Journal
Annu Rev Plant Biol 57:55-77 (2006)
DOI:10.1146/annurev.arplant.57.032905.105212
Reference
4  [PMID:8576141]
  Authors
Ito H, Ohtsuka T, Tanaka A.
  Title
Conversion of chlorophyll b to chlorophyll a via 7-hydroxymethyl chlorophyll.
  Journal
J Biol Chem 271:1475-9 (1996)
DOI:10.1074/jbc.271.3.1475
Reference
5  [PMID:16228557]
  Authors
Rudiger W.
  Title
Biosynthesis of chlorophyll b and the chlorophyll cycle.
  Journal
Photosynth Res 74:187-93 (2002)
DOI:10.1023/A:1020959610952
Other DBs
ExplorEnz - The Enzyme Database: 1.1.1.294
IUBMB Enzyme Nomenclature: 1.1.1.294
ExPASy - ENZYME nomenclature database: 1.1.1.294
BRENDA, the Enzyme Database: 1.1.1.294

DBGET integrated database retrieval system