| node1 | node2 | node1 accession | node2 accession | node1 annotation | node2 annotation | score |
| pyrAB | pyrB | ABC2333 | ABC2336 | Carbamoyl-phosphate synthase pyrimidine-specific large chain; Belongs to the CarB family. | Aspartate carbamoyltransferase; Belongs to the aspartate/ornithine carbamoyltransferase superfamily. ATCase family. | 0.999 |
| pyrAB | pyrC | ABC2333 | ABC2335 | Carbamoyl-phosphate synthase pyrimidine-specific large chain; Belongs to the CarB family. | Dihydroorotase; Catalyzes the reversible cyclization of carbamoyl aspartate to dihydroorotate; Belongs to the metallo-dependent hydrolases superfamily. DHOase family. Class I DHOase subfamily. | 0.997 |
| pyrAB | pyrDI | ABC2333 | ABC2331 | Carbamoyl-phosphate synthase pyrimidine-specific large chain; Belongs to the CarB family. | Dihydroorotate dehydrogenase catalytic subunit; Catalyzes the conversion of dihydroorotate to orotate with NAD(+) as electron acceptor; Belongs to the dihydroorotate dehydrogenase family. Type 1 subfamily. | 0.981 |
| pyrAB | pyrDII | ABC2333 | ABC2332 | Carbamoyl-phosphate synthase pyrimidine-specific large chain; Belongs to the CarB family. | Dihydroorotate dehydrogenase electron transfer subunit; Responsible for channeling the electrons from the oxidation of dihydroorotate from the FMN redox center in the PyrD type B subunit to the ultimate electron acceptor NAD(+). | 0.950 |
| pyrAB | pyrE | ABC2333 | ABC2329 | Carbamoyl-phosphate synthase pyrimidine-specific large chain; Belongs to the CarB family. | Orotate phosphoribosyltransferase; Catalyzes the transfer of a ribosyl phosphate group from 5- phosphoribose 1-diphosphate to orotate, leading to the formation of orotidine monophosphate (OMP). | 0.940 |
| pyrAB | pyrF | ABC2333 | ABC2330 | Carbamoyl-phosphate synthase pyrimidine-specific large chain; Belongs to the CarB family. | Orotidine 5'-phosphate decarboxylase; Catalyzes the decarboxylation of orotidine 5'-monophosphate (OMP) to uridine 5'-monophosphate (UMP); Belongs to the OMP decarboxylase family. Type 1 subfamily. | 0.935 |
| pyrAB | pyrP | ABC2333 | ABC2337 | Carbamoyl-phosphate synthase pyrimidine-specific large chain; Belongs to the CarB family. | Uracil transporter. | 0.884 |
| pyrAB | pyrR | ABC2333 | ABC2338 | Carbamoyl-phosphate synthase pyrimidine-specific large chain; Belongs to the CarB family. | Bifunctional pyrimidine biosynthesis protein PyrR; Also displays a weak uracil phosphoribosyltransferase activity which is not physiologically significant; Belongs to the purine/pyrimidine phosphoribosyltransferase family. PyrR subfamily. | 0.855 |
| pyrB | pyrAB | ABC2336 | ABC2333 | Aspartate carbamoyltransferase; Belongs to the aspartate/ornithine carbamoyltransferase superfamily. ATCase family. | Carbamoyl-phosphate synthase pyrimidine-specific large chain; Belongs to the CarB family. | 0.999 |
| pyrB | pyrC | ABC2336 | ABC2335 | Aspartate carbamoyltransferase; Belongs to the aspartate/ornithine carbamoyltransferase superfamily. ATCase family. | Dihydroorotase; Catalyzes the reversible cyclization of carbamoyl aspartate to dihydroorotate; Belongs to the metallo-dependent hydrolases superfamily. DHOase family. Class I DHOase subfamily. | 0.999 |
| pyrB | pyrDI | ABC2336 | ABC2331 | Aspartate carbamoyltransferase; Belongs to the aspartate/ornithine carbamoyltransferase superfamily. ATCase family. | Dihydroorotate dehydrogenase catalytic subunit; Catalyzes the conversion of dihydroorotate to orotate with NAD(+) as electron acceptor; Belongs to the dihydroorotate dehydrogenase family. Type 1 subfamily. | 0.985 |
| pyrB | pyrDII | ABC2336 | ABC2332 | Aspartate carbamoyltransferase; Belongs to the aspartate/ornithine carbamoyltransferase superfamily. ATCase family. | Dihydroorotate dehydrogenase electron transfer subunit; Responsible for channeling the electrons from the oxidation of dihydroorotate from the FMN redox center in the PyrD type B subunit to the ultimate electron acceptor NAD(+). | 0.969 |
| pyrB | pyrE | ABC2336 | ABC2329 | Aspartate carbamoyltransferase; Belongs to the aspartate/ornithine carbamoyltransferase superfamily. ATCase family. | Orotate phosphoribosyltransferase; Catalyzes the transfer of a ribosyl phosphate group from 5- phosphoribose 1-diphosphate to orotate, leading to the formation of orotidine monophosphate (OMP). | 0.979 |
| pyrB | pyrF | ABC2336 | ABC2330 | Aspartate carbamoyltransferase; Belongs to the aspartate/ornithine carbamoyltransferase superfamily. ATCase family. | Orotidine 5'-phosphate decarboxylase; Catalyzes the decarboxylation of orotidine 5'-monophosphate (OMP) to uridine 5'-monophosphate (UMP); Belongs to the OMP decarboxylase family. Type 1 subfamily. | 0.985 |
| pyrB | pyrP | ABC2336 | ABC2337 | Aspartate carbamoyltransferase; Belongs to the aspartate/ornithine carbamoyltransferase superfamily. ATCase family. | Uracil transporter. | 0.993 |
| pyrB | pyrR | ABC2336 | ABC2338 | Aspartate carbamoyltransferase; Belongs to the aspartate/ornithine carbamoyltransferase superfamily. ATCase family. | Bifunctional pyrimidine biosynthesis protein PyrR; Also displays a weak uracil phosphoribosyltransferase activity which is not physiologically significant; Belongs to the purine/pyrimidine phosphoribosyltransferase family. PyrR subfamily. | 0.992 |
| pyrB | smbA | ABC2336 | ABC2240 | Aspartate carbamoyltransferase; Belongs to the aspartate/ornithine carbamoyltransferase superfamily. ATCase family. | Uridylate kinase; Catalyzes the reversible phosphorylation of UMP to UDP. | 0.467 |
| pyrB | upp | ABC2336 | ABC3862 | Aspartate carbamoyltransferase; Belongs to the aspartate/ornithine carbamoyltransferase superfamily. ATCase family. | Uracil phosphoribosyltransferase; Catalyzes the conversion of uracil and 5-phospho-alpha-D- ribose 1-diphosphate (PRPP) to UMP and diphosphate. | 0.637 |
| pyrC | pyrAB | ABC2335 | ABC2333 | Dihydroorotase; Catalyzes the reversible cyclization of carbamoyl aspartate to dihydroorotate; Belongs to the metallo-dependent hydrolases superfamily. DHOase family. Class I DHOase subfamily. | Carbamoyl-phosphate synthase pyrimidine-specific large chain; Belongs to the CarB family. | 0.997 |
| pyrC | pyrB | ABC2335 | ABC2336 | Dihydroorotase; Catalyzes the reversible cyclization of carbamoyl aspartate to dihydroorotate; Belongs to the metallo-dependent hydrolases superfamily. DHOase family. Class I DHOase subfamily. | Aspartate carbamoyltransferase; Belongs to the aspartate/ornithine carbamoyltransferase superfamily. ATCase family. | 0.999 |