Abstract

Availability of adequate quantity of purified virus preparation from plant tissue is the major limitation in producing polyclonal antibodies (PAb) to begomovirus. Very few examples show successful utilization of E. coli expressed recombinant coat protein (CP) for immuno diagnosis of begomoviruses. In the present study, ~771bp CP gene (~29.0kDa) of Pumpkin yellow vein mosaic virus (PYVMV) was expressed as a ~71.0kDa fusion protein with maltose binding protein (MBP) (~42.0kDa) in E. coli. The MBP-CP was obtained in soluble state. The PAb to the purified fusion protein successfully detected PYVMV and other bipartite and monopartite begomoviruses in the field samples at 1:250 dilution in enzyme linked immunosorbent assay. Our study for the first time showed that MBP-tag fusion CP was suitable to produce diagnostic antibody to begomoviruses.

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