EC                 Enzyme                                 

3,8-divinyl chlorophyllide a reductase
Acting on the CH-CH group of donors;
With an iron-sulfur protein as acceptor
bacteriochlorophyllide-g:ferredoxin C-81-oxidoreductase
bacteriochlorophyllide g + 2 oxidized ferredoxin [iron-sulfur] cluster + ADP + phosphate = 3,8-divinyl chlorophyllide a + 2 reduced ferredoxin [iron-sulfur] cluster + ATP + H2O + 2 H+ [RN:R11531]
bacteriochlorophyllide g [CPD:C21441];
oxidized ferredoxin [iron-sulfur] cluster [CPD:C00139];
ADP [CPD:C00008];
phosphate [CPD:C00009]
3,8-divinyl chlorophyllide a [CPD:C11832];
reduced ferredoxin [iron-sulfur] cluster [CPD:C00138];
ATP [CPD:C00002];
H2O [CPD:C00001];
H+ [CPD:C00080]
The enzyme, found only in bacteriochlorophyll b-producing bacteria, catalyses the introduction of a C-8 ethylidene group. The enzyme contains a [4Fe-4S] cluster, and structurally resembles the Fe protein/MoFe protein complex of nitrogenase. It is very similar to EC, chlorophyllide a reductase, and is composed of three subunits. Two of them form the catalytic component, while the third one functions as an ATP-dependent reductase component that catalyses the electron transfer from ferredoxin to the catalytic component.
EC created 2016
K11333  3,8-divinyl chlorophyllide a/chlorophyllide a reductase subunit X
K11334  3,8-divinyl chlorophyllide a/chlorophyllide a reductase subunit Y
K11335  3,8-divinyl chlorophyllide a/chlorophyllide a reductase subunit Z
ALV: Alvin_2556 Alvin_2561 Alvin_2562
TVI: Thivi_2003 Thivi_2010 Thivi_2011
TMB: Thimo_3003 Thimo_3004 Thimo_3005
MPUR: MARPU_13265 MARPU_13270 MARPU_13275
TSY: THSYN_31095 THSYN_31100 THSYN_31105
TTP: E6P07_01740 E6P07_01745(bchY) E6P07_01790(bchZ)
THIP: N838_12395 N838_12400(bchY) N838_12405(bchZ)
CJAP: GWK36_12630(bchZ) GWK36_12635(bchY) GWK36_12640
THIM: KFB96_13090(bchZ) KFB96_13095(bchY) KFB96_13100
HHA: Hhal_1608 Hhal_1609 Hhal_1610
LIM: L103DPR2_00972(nifH1) L103DPR2_00973(bchN_1) L103DPR2_00974(chlB_1)
LIH: L63ED372_00628(nifH1) L63ED372_00629(bchN_1) L63ED372_00630(chlB)
RGE: RGE_33680(bchZ) RGE_33690(bchY) RGE_33700(bchX)
BRA: BRADO1618(bchX) BRADO1619(bchY) BRADO1620(bchZ)
BBT: BBta_6435(bchZ) BBta_6436(bchY) BBta_6437(bchX)
BRS: S23_19180(bchX) S23_19190(bchY) S23_19200(bchZ)
BRO: BRAD285_5779(bchZ) BRAD285_5780(bchY) BRAD285_5781(bchX)
BGZ: XH91_02645 XH91_02650(bchY) XH91_02655(bchZ)
RPA: RPA1522(bchX) RPA1523(bchY) RPA1524(bchZ)
BOS: BSY19_4053(bchZ) BSY19_4054(bchY) BSY19_4055
MEA: Mex_1p2927(bchX) Mex_1p2928(bchY) Mex_1p2929(bchZ)
MDI: METDI3496(bchX) METDI3497(bchY) METDI3498(bchZ)
MOR: MOC_3181(bchZ) MOC_3182(bchY) MOC_3183
BBAR: RHAL1_03012(bchZ) RHAL1_03013(bchY) RHAL1_03014(bchX)
JAN: Jann_0177(bchZ) Jann_0178(bchY) Jann_0179(bchX)
RDE: RD1_0109(bchZ) RD1_0110(bchY) RD1_0111(bchX)
DSH: Dshi_3517(bchX) Dshi_3518(bchY) Dshi_3519(bchZ)
MARU: FIU81_13850(chlB) FIU81_13855(chlN) FIU81_13860(nifH1)
MALU: KU6B_16430(bchX) KU6B_16440(bchY) KU6B_16450(bchZ)
RSP: RSP_0260(bchZ) RSP_0261(bchY) RSP_0262(bchX)
RCP: RCAP_rcc00687(bchX) RCAP_rcc00688(bchY) RCAP_rcc00689(bchZ)
PTP: RCA23_c29620(bchX) RCA23_c29630(bchY) RCA23_c29640(bchZ)
RSU: NHU_04287(bchX) NHU_04289(bchY) NHU_04290(bchZ)
BLAS: BSY18_3555 BSY18_3556(bchY) BSY18_3557(bchZ)
ERF: FIU90_13830(nifH1) FIU90_13835 FIU90_13840(chlB1)
AMV: ACMV_18770(bchZ) ACMV_18780(bchY) ACMV_18790(bchX)
RCE: RC1_2094(bchX) RC1_2095(bchY) RC1_2096(bchZ)
HMO: HM1_0654(bchY) HM1_0655(bchZ) HM1_0659(bchX)
HCV: FTV88_2670(bchX) FTV88_2673(bchZ) FTV88_2674(bchY)
CTE: CT1423(bchX) CT1826(bchY) CT2125(bchZ)
PROC: Ptc2401_00130(bchB_1) Ptc2401_00667(nifH1_1) Ptc2401_01952
 » show all
1  [PMID:23386973]
Tsukatani Y, Yamamoto H, Harada J, Yoshitomi T, Nomata J, Kasahara M, Mizoguchi T, Fujita Y, Tamiaki H
An unexpectedly branched biosynthetic pathway for bacteriochlorophyll b capable of absorbing near-infrared light.
Sci Rep 3:1217 (2013)
2  [PMID:25978726]
Tsukatani Y, Harada J, Nomata J, Yamamoto H, Fujita Y, Mizoguchi T, Tamiaki H
Rhodobacter sphaeroides mutants overexpressing chlorophyllide a oxidoreductase of Blastochloris viridis elucidate functions of enzymes in late bacteriochlorophyll  biosynthetic pathways.
Sci Rep 5:9741 (2015)
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