ID   1.8.7.3
DE   ferredoxin:CoB-CoM heterodisulfide reductase.
CA   coenzyme B + coenzyme M + 2 oxidized [2Fe-2S]-[ferredoxin] = coenzyme
CA   M-coenzyme B heterodisulfide + 2 H(+) + 2 reduced [2Fe-2S]-[ferredoxin].
CC   -!- HdrABC is an enzyme complex that is found in most methanogens and
CC       catalyzes the reduction of the CoB-CoM heterodisulfide back to CoB
CC       and CoM.
CC   -!- HdrA contains a FAD cofactor that acts as the entry point for
CC       electrons, which are transferred via HdrC to the HdrB catalytic
CC       subunit.
CC   -!- One form of the enzyme from Methanosarcina acetivorans (HdrA2B2C2)
CC       can also catalyze EC 1.8.98.4. cf. EC 1.8.98.5, EC 1.8.98.6,
CC       and EC 1.8.98.1.
DR   Q8TLB0, HDRA1_METAC;  Q8TM02, HDRA2_METAC;  Q8Q0T0, HDRA_METMA ;
DR   Q8TLB2, HDRB1_METAC;  Q8TIB8, HDRB2_METAC;  Q8PY83, HDRB_METMA ;
DR   Q8TLB1, HDRC1_METAC;  Q8TIB9, HDRC2_METAC;  Q8PY84, HDRC_METMA ;
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