| GO:0004590 | orotidine-5'-phosphate decarboxylase activity | 1 | 1 |
| GO:0004588 | orotate phosphoribosyltransferase activity | 1 | 1 |
| GO:0005737 | cytoplasm | 43 | 3767 |
| GO:0044281 | small molecule metabolic process | 15 | 1211 |
| GO:0007565 | female pregnancy | 1 | 78 |
| GO:0006222 | UMP biosynthetic process | 1 | 4 |
| GO:0006207 | 'de novo' pyrimidine nucleobase biosynthetic process | 1 | 3 |
| GO:0005634 | nucleus | 43 | 4559 |
| GO:0007595 | lactation | 1 | 39 |
| GO:0035690 | cellular response to drug | 2 | 49 |
| GO:0044205 | 'de novo' UMP biosynthetic process | 1 | 3 |
| GO:0005829 | cytosol | 61 | 2496 |
| GO:0046134 | pyrimidine nucleoside biosynthetic process | 1 | 6 |
| GO:0006206 | pyrimidine nucleobase metabolic process | 1 | 22 |
| GO:0055086 | nucleobase-containing small molecule metabolic process | 2 | 70 |