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Functional and Structural Characterization of Ebola Virus Glycoprotein (1976-2015)-An in Silico Study Publisher



Dehghani B1 ; Ghasabi F1 ; Hashempoor T1 ; Joulaei H1 ; Hasanshahi Z1 ; Halaji M1 ; Chatrabnous N2 ; Mousavi Z1 ; Moayedi J1
Authors
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Authors Affiliations
  1. 1. Shiraz HIV/AIDS Research Center, Institute of Health, Shiraz University of Medical Sciences, Shiraz, Iran
  2. 2. Department of Microbiology, School of Medicine, Isfahan University of Medical Sciences, Iran, Iran

Source: International Journal of Biomathematics Published:2017


Abstract

Ebola virus (EBOV) is the causative agent of a severe hemorrhagic fever disease associated with high mortality rates in humans. This virus has five strains of which Zaire Ebola virus (ZEBOV) is the first and most important strain. It can be transmitted through contact with contaminated surfaces and objects. The genome of EBOV codes one non-structural and seven structural proteins consisting of two forms of glycoprotein (GP): Soluble glycoprotein (sGP) and GP (spike). In this paper, we attempted to characterize and predict physicochemical properties, B-cell epitopes, mutation sites, phosphorylation sites, glycosylation sites, and different protein structures of EBOV GP to provide comprehensive data about changes of this GP during a 40-years course (1976-2015). GP sequences were obtained from NCBI gene bank from 1976-2015. Expasy'sProtParam, PROTSCALE, immuneepitope, Bepipred, BcePred, ABCpred, VaxiJen, DISPHOS, NetPhos, and numerous programs were used to predict and analyze all sequences. More variety of mutations were found in 2015 sequences and mutations were related to huge changes in B-cell epitopes, phosphorylation and glycosylation sites. In addition, our results determined different sites of disulfide bonds and an important mutation related to IgE epitope as well as four potent B-cell epitopes (380-387, 318-338, 405-438 and 434-475). In this study, we suggested the effect of mutations on GP properties, six positions for disulfide bonds and four phosphorylation sites for protein kinase C enzyme. Selected sequences were shown different sites for O-link and N-link glycosylation. A mutation that changed GP to an allergen protein and has a significant role in vaccine designing as well as four potent B-cell epitopes in GP protein were found. © 2017 World Scientific Publishing Company.
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