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
Porphyrin and chlorophyll metabolism
Metabolic pathways
Biosynthesis of secondary metabolites
Orthology
K13606  
chlorophyll(ide) b reductase
Genes
ATH: 
AT4G13250(NYC1) AT5G04900(NOL)
ALY: 
CRB: 
EUS: 
BRP: 
BNA: 
THJ: 
CIT: 
CIC: 
TCC: 
GRA: 
EGR: 
GMX: 
PVU: 
VRA: 
MTR: 
CAM: 
ADU: 
AIP: 
LJA: 
Lj0g3v0004249.1(Lj0g3v0004249.1) Lj0g3v0004249.2(Lj0g3v0004249.2) Lj2g3v0783700.1(Lj2g3v0783700.1) Lj2g3v0783700.2(Lj2g3v0783700.2)
FVE: 
PPER: 
PMUM: 
MDM: 
PXB: 
CSV: 
CMO: 
RCU: 
JCU: 
POP: 
POPTR_0008s01480g(POPTRDRAFT_563522) POPTR_0018s08790g(POPTRDRAFT_261857)
VVI: 
SLY: 
SPEN: 
SOT: 
SIND: 
BVG: 
NNU: 
OSA: 
4327178(NYC1)
DOSA: 
Os01t0227100-01(Os01g0227100) Os03t0654600-01(Os03g0654600)
OBR: 
BDI: 
SBI: 
SORBI_01g013080(SORBIDRAFT_01g013080) SORBI_03g001100(SORBIDRAFT_03g001100)
ZMA: 
100280491(GRMZM2G065194) 100281115(gpm587)
SITA: 
PDA: 
EGU: 
MUS: 
ATR: 
SMO: 
PPP: 
CRE: 
VCN: 
OLU: 
OTA: 
BPG: 
MIS: 
MPP: 
CSL: 
CVR: 
APRO: 
CME: 
CCP: 
ACAN: 
TPS: 
AAF: 
EHX: 
GTT: 
 » 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 (1996) 163-70.
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 (1998) 35102-8.
Reference
3  [PMID:16669755]
  Authors
Hortensteiner S.
  Title
Chlorophyll degradation during senescence.
  Journal
Annu. Rev. Plant. Biol. 57 (2006) 55-77.
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 (1996) 1475-9.
Reference
5  [PMID:16228557]
  Authors
Rudiger W.
  Title
Biosynthesis of chlorophyll b and the chlorophyll cycle.
  Journal
Photosynth. Res. 74 (2002) 187-93.
Other DBs
ExplorEnz - The Enzyme Database: 
IUBMB Enzyme Nomenclature: 
ExPASy - ENZYME nomenclature database: 
BRENDA, the Enzyme Database: 

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