This domain is found in a variety of oxidoreductases. This domain binds to a molybdopterin cofactor. Xanthine dehydrogenases, that also bind molybdopterin, have essentially no similarity.
This entry represents the NADH dependent nitrate reductase (NR) from plants and fungi, including NIA1 and NIA2 from Arabidopsis. They contain an N-terminal oxidoreductase molybdopterin binding domain and a C-terminal FAD-binding domain. The N-terminal domain is responsible for the reduction of nitrate; the C-terminal domain is responsible for the regeneration of the FAD cofactor. Only the N-terminal domain function is shown here; the C-terminal function can be found in MACiE:862.
Defined by 3 residues: CYS:B-79 [auth B-139]ASP:B-211 [auth B-271]ASN:B-212 [auth B-272]