Abstract：
:One of the most important rapidly emerging mosquito-borne alphavirus is Chikungunya virus (CHIKV). There is a necessity to develop anti-CHIKV therapeutics, as neither antiviral drug nor vaccines have been licensed yet. Several CHIKV proteins are being studied worldwide, but non-structural protein 3 (nsP3) has been less explored. This protein consists of three domains: macrodomain, alphavirus unique domain (AUD) and hypervariable region (HVR). The proline-rich regions of HVR contain SRC homology 3 (SH3)-binding domain which is essential for its functionality. Interaction of these motifs with host amphiphysin protein is crucial for viral RNA replication. Restricting the interactions of HVR could lead to inhibition of viral life cycle. Therefore, the present study focuses on purification of HVR protein and its structural and functional assay for therapeutic intervention in future use. In order to obtain purified protein, HVR region was amplified from TOPO clones of nsP3 of IND-06-Guj strain and cloned into expression vector. Expression and solubilization of the protein were optimized at various conditions of salt, detergent and imidazole before purification. The soluble recombinant HVR (His-HVR) protein was purified using affinity chromatography. Purified protein was analyzed for structural studies and functional assays. Circular dichroism of His-HVR protein was performed for structural study, and it was observed that it consists of mostly random coils. For functional assay, co-pull down of His-HVR protein was performed with endogenous amphiphysin-I protein of N2a cells and was analyzed using Western blotting. This purified protein obtained could be used as a potential target reagent for novel therapeutic interventions in the future.
journal_name
3 Biotechjournal_title
3 Biotechauthors
Nandi I,Gupta A,Chaudhary VK,Gupta V,Gabrani R,Gupta Sdoi
10.1007/s13205-019-1759-8subject
Has Abstractpub_date
2019-06-01 00:00:00pages
235issue
6eissn
2190-572Xissn
2190-5738pii
1759journal_volume
9pub_type
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