This family of mainly alphaproteobacterial enzymes is a member of the isocitrate/isopropylmalate dehydrogenase superfamily described by pfam00180. Every member of the seed of this model appears to have a TCA cycle lacking only a determined isocitrate dehydrogenase. The precise identity of the cofactor (NADH -- 1.1.1.41 vs. NADPH -- 1.1.1.42) is unclear. [Energy metabolism, TCA cycle]
Jiyao W et al.(2023). "The conserved domain database in 2023.",