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Expression of tomato yellow leaf curl virus coat protein using baculovirus expression system and evaluation of its utility as a viral antigen

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Abstract

DNA encoding the coat protein (CP) of an Egyptian isolate of tomato yellow leaf curl virus (TYLCV) was inserted into the genome of Autographa californica nucleopolyhedrovirus (AcNPV) under the control of polyhedrin promoter. The generated recombinant baculovirus construct harboring the coat protein gene was characterized using PCR analysis. The recombinant coat protein expressed in infected insect cells was used as a coating antigen in an indirect Enzyme-linked immunosorbent assay (ELISA) and dot blot to test its utility for the detection of antibody generated against TYLCV virus particles. The results of ELISA and dot blot showed that the TYLCV-antibodies reacted positively with extracts of infected cells using the recombinant virus as a coating antigen with strong signals as well as the TYLCV infected tomato and beat plant extracts as positive samples. Scanning electron microscope examination showed that the expressed TYLCV coat protein was self-assembled into virus-like particles (VLPs) similar in size and morphology to TYLCV virus particles. These results concluded that, the expressed coat protein of TYLCV using baculovirus vector system is a reliable candidate for generation of anti-CP antibody for inexpensive detection of TYLCV-infected plants using indirect CP-ELISA or dot blot with high specificity.

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Authors and Affiliations

  1. Department of Molecular Microbiology, Agricultural Genetic Engineering Research Institute, ARC, 9 Gamma St, Giza, Egypt

    Lamiaa Elgaied & Wael Elmenofy

  2. Department of Plant Molecular Biology, Agricultural Genetic Engineering Research Institute, ARC, 9 Gamma St, Giza, Egypt

    Reda Salem

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  1. Lamiaa Elgaied
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  2. Reda Salem
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  3. Wael Elmenofy
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Correspondence to Lamiaa Elgaied.

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Elgaied, L., Salem, R. & Elmenofy, W. Expression of tomato yellow leaf curl virus coat protein using baculovirus expression system and evaluation of its utility as a viral antigen. 3 Biotech 7, 269 (2017). https://doi.org/10.1007/s13205-017-0893-4

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