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Bombyx mori nucleopolyhedrovirus ORF79 encodes a 28-kDa structural protein of the ODV envelope

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Summary.

Open reading frame 79 of Bombyx mori nucleopolyhedrovirus (Bm79) is a conserved gene whose homologues have been identified in all 26 of the completely sequenced baculovirus genomes, including lepidopteran NPVs and GVs, hymenopteran NPVs, and a dipteran baculovirus. Northern blot analysis showed that the Bm79 transcript was about 850 nucleotides long and was initiated 12 h p.i. Temporal expression analysis revealed a 28-kDa protein, which was detected beginning 24 h p.i. using a polyclonal antibody against GST-Bm79 fusion protein. The 28-kDa protein was detected in the occlusion-derived virus envelope (ODV-E), but not in budded viruses. This observation was confirmed by observing ultrathin sections of polyhedra using immunoelectron microscopy. This demonstrated that the protein was present within the nuclei of cells. These results suggest that Bm79 is a functional gene that encodes a structural protein associated with the envelope of occlusion-derived virus (ODV).

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  1. Institute of Applied Entomology, Zhejiang University, Hangzhou, P.R. China

    H.-J. Xu, Z.-N. Yang, F. Wang & C.-X. Zhang

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  1. H.-J. Xu
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  2. Z.-N. Yang
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  3. F. Wang
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  4. C.-X. Zhang
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Xu, HJ., Yang, ZN., Wang, F. et al. Bombyx mori nucleopolyhedrovirus ORF79 encodes a 28-kDa structural protein of the ODV envelope. Arch Virol 151, 681–695 (2006). https://doi.org/10.1007/s00705-005-0664-0

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