KEGG   ENZYME: 1.8.7.3Help
Entry
EC 1.8.7.3                  Enzyme                                 

Name
ferredoxin:CoB-CoM heterodisulfide reductase;
hdrABC (gene names);
hdrA1B1C1 (gene names);
hdrA2B2C2 (gene names)
Class
Oxidoreductases;
Acting on a sulfur group of donors;
With an iron-sulfur protein as acceptor
BRITE hierarchy
Sysname
CoB,CoM:ferredoxin oxidoreductase
Reaction(IUBMB)
2 oxidized ferredoxin [iron-sulfur] cluster + CoB + CoM = 2 reduced ferredoxin [iron-sulfur] cluster + CoM-S-S-CoB + 2 H+ [RN:R11931]
Reaction(KEGG)
Substrate
oxidized ferredoxin [iron-sulfur] cluster [CPD:C00139];
CoB [CPD:C04628];
CoM [CPD:C03576]
Product
reduced ferredoxin [iron-sulfur] cluster [CPD:C00138];
CoM-S-S-CoB [CPD:C04832];
H+ [CPD:C00080]
Comment
HdrABC is an enzyme complex that is found in most methanogens and catalyses the reduction of the CoB-CoM heterodisulfide back to CoB and CoM. HdrA contains a FAD cofactor that acts as the entry point for electrons, which are transferred via HdrC to the HdrB catalytic subunit. One form of the enzyme from Methanosarcina acetivorans (HdrA2B2C2) can also catalyse EC 1.8.98.4, coenzyme F420:CoB-CoM heterodisulfide,ferredoxin reductase. cf. EC 1.8.98.5, H2:CoB-CoM heterodisulfide,ferredoxin reductase, EC 1.8.98.6, formate:CoB-CoM heterodisulfide,ferredoxin reductase, and EC 1.8.98.1, dihydromethanophenazine:CoB-CoM heterodisulfide reductase.
History
EC 1.8.7.3 created 2017
Pathway
ec00680  Methane metabolism
ec01100  Metabolic pathways
ec01120  Microbial metabolism in diverse environments
Orthology
K03388  heterodisulfide reductase subunit A2
K03389  heterodisulfide reductase subunit B2
K03390  heterodisulfide reductase subunit C2
K22480  heterodisulfide reductase subunit A1
K22481  heterodisulfide reductase subunit B1
K22482  heterodisulfide reductase subunit C1
Genes
TIG: THII_2280
TVI: Thivi_3111
TMB: Thimo_0247 Thimo_0248 Thimo_0253
TSY: THSYN_16425
HHC: M911_11215 M911_11220 M911_11230 M911_11235 M911_11240
EBS: ECTOBSL9_0282 ECTOBSL9_0283 ECTOBSL9_0285 ECTOBSL9_0286 ECTOBSL9_0287
TGR: Tgr7_2211 Tgr7_2212 Tgr7_2214 Tgr7_2215 Tgr7_2216
TKM: TK90_0632 TK90_0633 TK90_0634 TK90_0636 TK90_0637
TNI: TVNIR_3244(hdrB_[H]) TVNIR_3245(hdlC_[H]) TVNIR_3247(hdrA_[H]) TVNIR_3248(hdlB_[H]) TVNIR_3249
TVR: TVD_10625 TVD_10630 TVD_10640 TVD_10645 TVD_10650
SLIM: SCL_2520
TBN: TBH_C2777
ENM: EBS_2145(hdrB)
CBX: Cenrod_2147(hdrA)
SHD: SUTH_02769(hdrB)
TBD: Tbd_1645
SDR: SCD_n01881(hdrB)
GSU: GSU0090(hdrA) GSU0091(hdrB) GSU0092(hdrC)
GSK: KN400_0065(hdrA) KN400_0066(hdrB) KN400_0067(hdrC)
GME: Gmet_2084(bamE) Gmet_3424(hdrC) Gmet_3425(hdrB) Gmet_3426(hdrA)
GBM: Gbem_0030(hdrA) Gbem_0031(hdrB) Gbem_0032(hdrC) Gbem_1447(bamE)
GEO: Geob_0215(bamE-1) Geob_0231(bamE-2) Geob_3723(hdrA) Geob_3724(hdrB) Geob_3725(hdrC)
DVU: DVU2402(hdrA) DVU2403(hdrB) DVU2404(hdrC)
DMA: DMR_01900(hdrC) DMR_01910(hdrB) DMR_01920(hdrA) DMR_22120
DGG: DGI_1048(hdrC) DGI_1049(hdrB) DGI_1050(hdrA)
DTR: RSDT_0565(hdrC) RSDT_0566(hdrB) RSDT_0567(hdrA)
DPI: BN4_10653 BN4_11858(hdrC) BN4_11859(hdrB) BN4_11860(hdrA)
PPRF: DPRO_3258
DPS: DP1010
DML: Dmul_02770(hdrA1) Dmul_24500(bamE) Dmul_28860(hdrA2) Dmul_28870(hdrB) Dmul_28880(hdrC)
DAT: HRM2_11710(hdrA1) HRM2_11850(hdrA2) HRM2_22720(hdrL2) HRM2_22750(hdrA4) HRM2_22760(hdrD2) HRM2_22770(hdrD2')
ADE: Adeh_4164
SAT: SYN_00626
PTH: PTH_1410(HdrA) PTH_1412(HdrB) PTH_1413(GlpC)
STED: SPTER_13740 SPTER_13750(sdhE_1) SPTER_13760(mnmC)
DFO: Dform_00920(hdrA) Dform_00941(hdrA) Dform_00942(hdrB) Dform_00943(hdrC)
CTE: CT1245 CT1246(hdrA-2)
AAE: aq_391 aq_395(hdrA) aq_398(hdrC) aq_400(hdrB)
HTH: HTH_1878(hdrB1) HTH_1879(hdrC1) HTH_1881(hdrA) HTH_1882(hdrB2) HTH_1883(hdrC2)
CTHI: THC_1756
MMP: MMP0825(hdrA) MMP1053(hdrB2) MMP1054(hdrC2) MMP1154(hdrC1) MMP1155(hdrB1) MMP1697(hdrA)
MMG: MTBMA_c04490(hdrC) MTBMA_c04500(hdrB) MTBMA_c17680(hdrA)
MWO: MWSIV6_0409(hdrC) MWSIV6_0410(hdrB) MWSIV6_1762(hdrA)
METE: tca_01335(rsxB_2) tca_01814 tca_01815(lutA)
MST: Msp_0125(hdrC2) Msp_0126(hdrB2) Msp_0127(hdrA2) Msp_1013(hdrB1) Msp_1014(hdrC1) Msp_1476(hdrA1)
MRU: mru_0117(hdrA) mru_0816(hdrC) mru_0817(hdrB1)
MEB: Abm4_0693(hdrC1) Abm4_0694(hdrB1) Abm4_0695(hdrA1) Abm4_1308(hdrB2) Abm4_1309(hdrC2) Abm4_1691(hdrA2)
MMIL: sm9_0982(hdrC1) sm9_0983(hdrB1) sm9_0984(hdrA1) sm9_1716(hdrB3) sm9_1717(hdrC2) sm9_2251(hdrA2)
MFC: BRM9_0490(hdrB1) BRM9_0491(hdrC1) BRM9_1362(hdrC2) BRM9_1363(hdrB3) BRM9_1364(hdrA1) BRM9_2298(hdrA2)
MCUB: MCBB_1055(hdrC1) MCBB_1056(hdrB1) MCBB_1057(hdrA1) MCBB_1489(hdrB3) MCBB_1490(hdrC3) MCBB_2243(hdrA3)
MKA: MK0249(hdrA_1) MK0265(hdrA_2) MK0572(hdrB) MK0573(hdrC)
MEAR: Mpt1_c02960(hdrC1) Mpt1_c02970(hdrB1) Mpt1_c08830(hdrB2) Mpt1_c08840(hdrC2) Mpt1_c10580(hdrA)
MAC: MA_2868(hdrA) MA_3126(hdrB) MA_3127(hdrC) MA_3128(hdrA) MA_4236(hdrC) MA_4237(hdrB)
MBU: Mbur_0552(hdrA) Mbur_1516(hdrC) Mbur_1517(hdrB)
MCJ: MCON_3279(hdrA) MCON_3282(hdrC) MCON_3283(hdrB)
MBG: BN140_0752(hdrA1) BN140_1726(hdrC) BN140_1727(hdrB) BN140_1728(hdrA3)
MEMA: MMAB1_0971(hdrA) MMAB1_2221(hdrC) MMAB1_2222(hdrB) MMAB1_2223(hdrA)
MPD: MCP_1576(hdrA-1) MCP_1577(hdrB-1) MCP_1578(hdrC-1) MCP_1989(hdrA_mvhD) MCP_1990(hdrB-2) MCP_1991(hdrC-2) MCP_2768(hdrA-2) MCP_2769(hdrB-3) MCP_2770(hdrC-3)
MEZ: Mtc_1469(hdrC-1) Mtc_1470(hdrB-1) Mtc_1471(hdrA1) Mtc_2473(hdrA-2) Mtc_2474(hdrB-2) Mtc_2475(hdrC-2)
RCI: LRC437(hdrA-1) LRC438(hdrB-1) LRC439(hdrC-1) RCIX594(hdrC-2) RCIX595(hdrB-2) RCIX596(hdrA-2) RRC256(hdrC-3) RRC257(hdrB-3) RRC258(hdrA-3)
SSO: SSO1127(hdrC-1) SSO1129(hdrB-1) SSO1131(hdrA) SSO1134(hdrC-2) SSO1135(hdrB-2)
BARC: AOA65_0029(hdrB_1) AOA65_0030(hdrC_1) AOA65_1112(hdrA_1) AOA65_1193(hdrA_2) AOA65_1400(hdrC_2) AOA65_1401(hdrB_2) AOA65_1402(hdrA_3) AOA65_1719(hdlA_2) AOA65_1887(hdrB_3) AOA65_1888(hdrC_3) AOA65_1993(hdrB_4) AOA65_1994(hdrC_4) AOA65_1995(hdrA_4)
BARB: AOA66_0155(hdrA_1) AOA66_1507(hdrB_1) AOA66_1508(hdrC_1) AOA66_1510(hdrA_2) AOA66_1512(hdlA_2) AOA66_1513(hdrA_3) AOA66_1526(hdrA_4) AOA66_1731(hdrB_2) AOA66_1732(hdrC_2)
LOKI: Lokiarch_00280(hdlA_1) Lokiarch_00290(hdrA_1) Lokiarch_01240(hdrA_2) Lokiarch_01250(hdrC_1) Lokiarch_01260(hdrB_1) Lokiarch_03060(hdrC_2) Lokiarch_08680(hdrA_4) Lokiarch_09890(hdlA_2) Lokiarch_09900(hdrA_5) Lokiarch_10040(hdlA_3) Lokiarch_10840(hdrA_6) Lokiarch_17940(hdlA_5) Lokiarch_23580(hdrC_3) Lokiarch_23590(hdrB_2) Lokiarch_23600(hdrA_8) Lokiarch_23870(hdrC_4) Lokiarch_25880(hdrA_9) Lokiarch_28050(hdrA_10) Lokiarch_39150(hdrB_3) Lokiarch_39160(hdrC_5) Lokiarch_40200(hdrA_13) Lokiarch_40210(hdlA_6) Lokiarch_41160(hdrA_15) Lokiarch_45500(hdrC_6) Lokiarch_45510(hdrB_4) Lokiarch_49330(hdrA_16)
 » show all
Taxonomy
Reference
1  [PMID:19968794]
  Authors
Buan NR, Metcalf WW
  Title
Methanogenesis by Methanosarcina acetivorans involves two structurally and functionally distinct classes of heterodisulfide reductase.
  Journal
Mol Microbiol 75:843-53 (2010)
DOI:10.1111/j.1365-2958.2009.06990.x
  Sequence
Reference
2  [PMID:28174314]
  Authors
Yan Z, Wang M, Ferry JG
  Title
A Ferredoxin- and F420H2-Dependent, Electron-Bifurcating, Heterodisulfide Reductase with Homologs in the Domains Bacteria and Archaea.
  Journal
MBio 8 (2017)
DOI:10.1128/mBio.02285-16
  Sequence
Other DBs
ExplorEnz - The Enzyme Database: 1.8.7.3
IUBMB Enzyme Nomenclature: 1.8.7.3
ExPASy - ENZYME nomenclature database: 1.8.7.3
BRENDA, the Enzyme Database: 1.8.7.3
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