Journal
VIRUS RESEARCH
Volume 247, Issue -, Pages 55-60Publisher
ELSEVIER
DOI: 10.1016/j.virusres.2018.01.017
Keywords
Infectious bursal disease virus; Viral protein 5; Function; In silico; Structure
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Funding
- Council of Scientific and Industrial Research (CSIR), India
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Infectious Bursal Disease (IBD) is an acute, highly contagious and immunosuppressive disease of young chicken. The causative virus (IBDV) is a bi-segmented, double-stranded RNA virus. The virus encodes five major proteins, viral protein (VP) 1-5. VPs 1-3 have been characterized crystallographically. Albeit a rise in the number of studies reporting successful heterologous expression of VP5 in recent times, challenging the notion that rapid death of host cells overexpressing VP5 disallows obtaining sufficiently pure preparations of the protein for crystallographic studies, the structure of VP5 remains unknown and its function controversial. Our study describes the first 3D model of IBD VP5 obtained through an elaborate computational workflow. Based on the results of the study, IBD VP5 can be predicted to be a structural analog of the leucine-rich repeat (LRR) family of proteins. Functional implications arising from structural similarity of VP5 with host Toll-like receptor (Tlr) 3 also satisfy the previously reported opposing roles of the protein in first abolishing and later inducing host-cell apoptosis.
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