has role protective antigen role protective antigen Chlamydophila abortus protein GatA Oliver He Genetic immunization was used to functionally test the genes of C. abortus as vaccines in a mouse challenge system. Glu-tRNA Gln Amidotransferase (CP #3, gatA) was found to be protective. Three of the clones (CP #1) elicited protection that was statistically higher than the unvaccinated control, which has high variance [PubMed: 15811648]. Note: Part of CP #3 also belongs to gatB Allen Xiang protein Protegen ID: 422; NCBI Protein GI: 62184918; NCBITaxon: 218497