Development of Brucellosis Vaccine Based on Determinant Antigenic of Outer Membrane Protein (OMP) 36 kDa From Brucella abortus Local Isolate

Brucellosis is a disease that can be prevented through vaccination. Yet, the effectiveness of the vaccination to fight this disease is considered weak. Fortunately, attempts to modify brucellosis vaccine is still keep going. Some brucellosis vaccines have been found and developed in the past time such as the vaccine B.abortus strain 19-BA and 104M which was made from weakened microbes which had been widely used in Uni Soviet and China. The other brucellosis vaccine that were used in the past were the phenolinsoluble peptidoglycan vaccine which was made in France and polysaccharideprotein vaccine which was used in Russia. This research attempted to see the determinant of antigenic Outer Membrane Protein (OM) 36 kDa Brucella abortus local isolation which has immunogenic character to be developed as an advanced brucellosis vaccine. The method used in this research was the Omp2 gene of Brucella abortus of local isolate employed the PCR technique. The result of the PCR was then sequenced to analyze the determinant antigenic and the bounding prediction of either the T cell or the B cell which were responsible for immune response. The result of this study showed that the gen Omp2 which encoded the OMP 36 kDa Brucella abortus of local isolation with primary JPF 5’ GCG CTC AGG CTG CCG ACG CAA 3’ and JPR 5’ CAT TGC GGT CGG TAC CGG AG 3’ targeted the gene 162 bp, was then translated into amino acids to be later undergo the in silico test using Kolaskar & Tongaonkar Antigenicity Prediction method. The epitope prediction resulted were MSRVCDAYGAGYFYI and TETCLRVHGYVRYD. The result of the epitope prediction of MSRVCDAYGAGYFYI showed that there was a bond with MHC I in YGAGYFYI of the 8 amino acid series to the 15 series, while the epitope prediction of TETCLRVHGYVRYD showed that there was a bond to the ETCLRVHGY of the series of amino acids number 2 to 10. Bond with MHC II existed in the amino acid series of MSRVCDAYGAGYFYI, while the bond with the B cells existed in BCSAYGA and CLRVHG amino acid series. This research has been successful in predicting the epitope of the OMP 36 kDa Brucella abortus of local isolate which had immunogenic characteristic for its ability to bond with the MHC I, MHC II and B cells.