has_part has part has_part has disposition at some time attenuated disposition B. abortus pyrB mutant B. abortus 2308 pyrB mutant A mutant of strain Brucella melitensis biovar Abortus 2308 that lacks an intact gene pyrB. NCBIGene: 3827823 Information about the mutated molecule: CATALYTIC ACTIVITY: Carbamoyl phosphate + L-aspartate = phosphate + N-carbamoyl-L-aspartate(Swiss-Prot: P65612). PATHWAY: Nucleotide biosynthesis YH UniProtKB accession: Q2YKL8 PMID: UMP biosynthesis The gene pyrB from the strain Brucella melitensis biovar Abortus 2308 is a virulence gene. pyrB aspartate carbamoyltransferase catalytic subunit