Orotidine 5'-phosphate decarboxylase / HUMPS family
This family includes Orotidine 5'-phosphate decarboxylase enzymes EC:4.1.1.23 that are involved in the final step of pyrimidine biosynthesis. The family also includes enzymes such as hexulose-6-phosphate synthase. This family appears to be distantly ...
This family includes Orotidine 5'-phosphate decarboxylase enzymes EC:4.1.1.23 that are involved in the final step of pyrimidine biosynthesis. The family also includes enzymes such as hexulose-6-phosphate synthase. This family appears to be distantly related to Pfam:PF00834.
Orotidine-5'-phosphate decarboxylase catalyses the decarboxylation of orotidine-5'-phosphate, the sixth and final step in the de novo pyrimidine biosynthesis of uridine monophosphate. It accelerates the reaction by 10^17 and hence is the most proficient enzyme discovered so far. In most prokaryotes the bioactive form is a homodimer. In higher organisms it is part of a bifunctional enzyme.
Defined by 6 residues: LYS:A-33ASP:A-60LYS:A-62THR:A-123ARG:A-215ASP:B-65