"Catalysis of an oxidation-reduction (redox) reaction, a reversible chemical reaction in which the oxidation state of an atom or atoms within a molecule is altered. One substrate acts as a hydrogen or electron donor and becomes oxidized, while the other acts as hydrogen or electron acceptor and becomes reduced [goid 16491] [evidence IEA]; Interacting selectively with an iron-sulfur cluster, a combination of iron and sulfur atoms [goid 51536] [evidence IEA]; Catalysis of the reaction: (S)-dihydroorotate + O2 = orotate + H2O2 [goid 4158] [evidence IEA]; Catalysis of the reaction: 5,6-dihydrouracil + NAD+ = uracil + NADH + H+ [goid 4159] [pmid 8083224] [evidence EXP]; The selective, often stoichiometric, interaction of a molecule with one or more specific sites on another molecule [goid 5488] [evidence IEA]; Interacting selectively with iron (Fe) ions [goid 5506] [evidence IEA]; Any molecular entity that serves as an electron acceptor and electron donor in an electron transport system [goid 9055] [evidence IEA]; Catalysis of an oxidation-reduction (redox) reaction, a reversible chemical reaction in which the oxidation state of an atom or atoms within a molecule is altered. One substrate acts as a hydrogen or electron donor and becomes oxidized, while the other acts as hydrogen or electron acceptor and becomes reduced [goid 16491] [evidence IEA]; Catalysis of the reaction: 5,6-dihydrouracil + NADP+ = uracil + NADPH + H+ [goid 17113] [pmid 11988088] [evidence IMP]; Catalysis of the reaction: 5,6-dihydrouracil + NADP+ = uracil + NADPH + H+ [goid 17113] [pmid 8083224] [evidence EXP]; Catalysis of the reaction: 5,6-dihydrouracil + NADP+ = uracil + NADPH + H+ [goid 17113] [pmid 1512248] [evidence IDA]; Catalysis of the reaction: 5,6-dihydrouracil + NADP+ = uracil + NADPH + H+ [goid 17113] [evidence ISS]; Catalysis of the reaction: 5,6-dihydrouracil + NADP+ = uracil + NADPH + H+ [goid 17113] [pmid 18075467] [evidence IDA]; Catalysis of the reaction: 5,6-dihydrouracil + NADP+ = uracil + NADPH + H+ [goid 17113] [pmid 10410956] [evidence IDA]; Interacting selectively with an identical protein to form a homodimer [goid 42803] [evidence ISS]; Interacting selectively with an identical protein to form a homodimer [goid 42803] [pmid 1512248] [evidence IDA]; Interacting selectively with any metal ion [goid 46872] [evidence IEA]; Interacting selectively with FAD, flavin-adenine dinucleotide, the coenzyme or the prosthetic group of various flavoprotein oxidoreductase enzymes [goid 50660] [evidence ISS]; Interacting selectively with nicotinamide-adenine dinucleotide phosphate, a coenzyme involved in many redox and biosynthetic reactions; binding may be to either the oxidized form, NADP, or the reduced form, NADPH [goid 50661] [evidence ISS]; Interacting selectively with a 4 iron, 4 sulfur (4Fe-4S) cluster; this cluster consists of four iron atoms, with the inorganic sulfur atoms found between the irons and acting as bridging ligands [goid 51539] [evidence IEA]"