Genome-Wide Prediction of Potential Vaccine Candidates for Campylobacter jejuni Using Reverse Vaccinology.
Campylobacteriosis is a deadly disease which has developed resistance to most of the available chemotherapeutic agents. Although various studies provide evidence of acquired immunity following exposure to Campylobacter jejuni, no effective vaccine has been developed, still. Hence, there is an urgent need to identify potential vaccine candidates for Campylobacter species. In the proposed study, Campylobacter jejuni subsp. jejuni serotype O:2 (strain NCTC 11168) was taken and computational approach was employed to screen C. jejuni genome for promising vaccine candidates. From 1623 protein-coding sequences, 37 potential antigens were screened for epitope prediction based on surface association, consensus antigenicity predictions, solubility, transmembrane domain, and ortholog analysis. Comprehensive immunogenic analysis of these 37 antigens revealed that antigen Q0PA22 shows the greatest potential for experimental immunogenicity analysis. It has several potential CD4+ and CD8+ T-cell epitopes, as well as high probability of B-cell epitope regions as compared to well-characterized antigen Omp18 (Uniprot ID:Q0PC24). Among the highest scoring predicted epitopes, an optimal set of epitopes with respect to overall immunogenicity in target populations for campylobacteriosis viz. Europe, North America and Southwest Asia was determined. An epitope AMLTYMQWL from antigen no. 6(Q0PA22) binds to the most prevalent allele HLA-A*0201, and this epitope has most immunogenicity for all the target populations. In addition, this epitope exhibited highly significant TCR-pMHC interactions having a joint Z value of 4.87. Homology mapping studies of the predicted epitope show best homology to a well-studied antigenic peptide from influenza virus H5N1. Therefore, the predicted epitope might be a suitable vaccine candidate.
['Jain|Richa|R|', 'Singh|Sarita|S|', 'Verma|Santosh Kumar|SK|', 'Jain|Ankit|A|']
D000818:Animals D001428:Bacterial Vaccines D002169:Campylobacter Infections D016123:Campylobacter jejuni D019295:Computational Biology D015195:Drug Design D000939:Epitopes D018985:Epitopes, B-Lymphocyte D018984:Epitopes, T-Lymphocyte D016680:Genome, Bacterial D006801:Humans D009980:Influenza A virus D008285:Major Histocompatibility Complex D051379:Mice D016571:Neural Networks, Computer D010455:Peptides D020543:Proteome D000078782:Vaccinology
Vaccine Campylobacter Reverse vaccinology Epitope MHC