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Designing a polytopic complex vaccine candidate against Gallibacterium anatis: an In-silico study | ||
| Archives of Razi Institute | ||
| مقاله 2، دوره 74، شماره 1، خرداد 2019، صفحه 7-20 اصل مقاله (729.49 K) | ||
| نوع مقاله: Original Articles | ||
| شناسه دیجیتال (DOI): 10.22092/ari.2017.109804.1118 | ||
| نویسندگان | ||
| S. Ataei* 1؛ M. M. Ranjbar2؛ N. Motamed1؛ S. Ataei Kachooei3؛ F. Amini Njafi4 | ||
| 1Department of Avian Bacterial Diseases, Razi Vaccine and Serum Research Institute, Agricultural Research, Education, and Extension Organization, Karaj, Iran | ||
| 2Department of Animal Viral Diseases, Razi Vaccine and Serum Research Institute, Agricultural Research, Education, and Extension Organization, Karaj, Iran | ||
| 3Department of Cellular Molecular Sciences, Faculty of Life Sciences, Kharazmi University, Karaj, Iran | ||
| 4R & D, Tose Kosar Group, Tehran, Iran | ||
| چکیده | ||
| The haemolytic biovar of Gallibacterium anatis (G. anatis) is responsible for urogenital, gastrointestinal, and respiratory diseases in chickens. There are numerous reports on the resistance of G. anatis to antibiotics and recurrence of the disease, which raise concerns about antimicrobial treatment efficiency. Vaccination has been considered as the most feasible procedure of prevention in high risk farms. Subunit vaccines containing immunogenic components can have practical protective value in preventive measures regarding the infection. The present study aimed to introduce a polytopic vaccine candidate based on epitope detection. All registered sequences of four immunogenic proteins, includig Flfa, GTxA, Gab_1309, and Gab_2348 were retrieved and directed for variational analysis. A vaccine isolate was selected for each protein and tested for B-cell epitope mapping using different tools. Furthermore, consensus selected immunogenic regions with special patterns fused together by flexible linkers were integrated into two constructs and checked for the best status of proteasomal cleavage sites, as well as hydropathy plot. Moreover, back translations, along with codon optimization were performed, and then some tags were added to the constructs. The selected consensus B-cell immunogenic epitopes were for 12656: AA114-181, 7990: AA114-181, Avicor: AA42-77, 134-197, and IPDH: 61-155 for Flfa protein, AA185-235, AA372-457, and AA807-941 for GtxA-N, AA260-305, AA340-400, and AA110-146 for Gab-1309, and AA125-AA175 for Gab-2348. Two suitable patterns of attachment were selected from the different fusion patterns of epitopes in B-cell polytopic vaccinal constructs. Finally, the examination of these constructs showed their effect and efficacy for immune system stimulation. Based on bioinformatics results, these immunogens could be utilized as potential candidates to develop polytopic protective vaccines and design diagnostic kits. | ||
| کلیدواژه‌ها | ||
| Gallibacterium anatis؛ vaccine؛ Polytopic؛ In-silico | ||
| مراجع | ||
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