The MopB_CT_4 CD includes a group of related uncharacterized bacterial and archaeal molybdopterin-binding oxidoreductase-like domains with a putative N-terminal iron-sulfur [4Fe-4S] cluster binding site and molybdopterin cofactor binding site. This CD is of the conserved molybdopterin_binding C-terminal (MopB_CT) region present in many, but not all, MopB homologs.
Jiyao W et al.(2023). "The conserved domain database in 2023.",