has part molybdopterin synthase activity cysteine desulfurase activity molybdopterin cofactor biosynthetic process https://github.com/geneontology/go-ontology/issues/23954 molybdopterin cofactor formation The chemical reactions and pathways resulting in the formation of the molybdopterin cofactor (Moco), essential for the catalytic activity of some enzymes, e.g. sulfite oxidase, xanthine dehydrogenase, and aldehyde oxidase. The cofactor consists of a mononuclear molybdenum (Mo-molybdopterin) or tungsten ion (W-molybdopterin) coordinated by one or two molybdopterin ligands. biological_process Reactome:R-HSA-947581 molybdopterin cofactor anabolism GO:0032324 molybdopterin cofactor synthesis MetaCyc:Molybdenum-Cofactor-Biosynthesis molybdopterin cofactor biosynthesis molybdopterin cofactor metabolic process molybdopterin adenylyltransferase activity molybdopterin-synthase sulfurtransferase activity molybdopterin-synthase adenylyltransferase activity organophosphate biosynthetic process