Function
Catalyzes the NAD-dependent oxidation and decarboxylation of (2R,3S)-homoisocitrate ((1R,2S)-1-hydroxybutane-1,2,4-tricarboxylate), (2R,3S)-homo(2)-isocitrate and (2R,3S)-homo(3)-isocitrate, into 2-oxoadipate, 2-oxopimelate, and 2-oxosuberate, respectively. This last compound is a precursor to coenzyme B and biotin in methanoarchaea. Is also able to produce 2-oxoazelate from (2R,3S)-homo(4)-isocitrate. Is not able to use NADP as an oxidant.
Sequence
MMKVCVIEGDGIGKEVIPEAIKILNELGEFEIIKGEAGLECLKKYGNALPEDTIEKAKEADIILFGAITSPKPGEVKNYKSPIITLRKMFHLYANVRPINNFGIGQLIGKIADYEFLNAKNIDIVIIRENTEDLYVGRERLENDTAIAERVITRKGSERIIRFAFEYAIKNNRKKVSCIHKANVLRITDGLFLEVFNEIKKHYNIEADDYLVDSTAMNLIKHPEKFDVIVTTNMFGDILSDEASALIGGLGLAPSANIGDDKALFEPVHGSAPDIAGKGIANPMASILSIAMLFDYIGEKEKGDLIREAVKYCLINKKVTPDLGGDLKTKDVGDEILNYIRKKLKGY