De novo pyrimidine biosynthesis, glutamine (+ PRPP) => UMP
Brite
Enzymatic reactions [BR:br08201]
1. Oxidoreductase reactions
1.3 Acting on the CH-CH group of donors
1.3.1 With NAD+ or NADP+ as acceptor
1.3.1.14
R01869 (S)-Dihydroorotate + NAD+ <=> Orotate + H+ + NADH