Molybdenum cofactor deficiency (MOCOD) is a rare autosomal recessive disorder that leads to early childhood death. Mutations have been identified in three genes: MOCS1, MOCS2, and GEPH. These mutations result in the simultaneous loss of all MoCo-dependent enzyme activities, that include sulfite oxidase, xanthine dehydrogenase, and aldehyde oxidase. MOCOD results in neonatal seizures and other neurological symptoms identical to those of sulfite oxidase deficiency [DS:H01237].
