Characterization of the Open Reading Frame 35 of Bombyx mori Nucleopolyhedrovirus

  • Zhu, Ying Min (Institute of Life Science, Jiangsu University) ;
  • Li, Guo Hui (Institute of Life Science, Jiangsu University) ;
  • Yao, Qin (Institute of Life Science, Jiangsu University) ;
  • Chen, Ke Ping (Institute of Life Science, Jiangsu University) ;
  • Guo, Zhong Jian (Institute of Life Science, Jiangsu University)
  • Received : 2010.10.04
  • Accepted : 2010.12.02
  • Published : 2010.12.31

Abstract

Open reading frame 35 (bm35) of the Bombyx mori nucleopolyhedrovirus (BmNPV) is a special gene whose homologues are only found in some group-I nucleopolyhedroviruses, suggesting that bm35 plays a specific role in the viral life cycle. This paper described the characterization of BmNPV bm35. Computerassisted sequence analysis shows that a putative RING finger motif is observed in the protein, Bm35 encoded by bm35. The coding sequence of bm35 was amplified and subcloned into the vector pET30a(+) and the $(His)_6$-tagged fusion protein His-Bm35 was expressed in the Escherichia coli BL21 (DE3) LysS cells. The bm35 transcript and Bm35 protein were detected in BmNPV-infected BmN cells at 12~48 h post infection (p.i.) by RT-PCR and Western blot analysis using the polyclonal antibody generated by immunizing a rabbit with purified $(His)_6$-tagged Bm35, suggesting that bm35 is synthesized in the late stage of BmNPV infection cycle. Bm35 was not a structural component associated with budded virus (BV) and occlusion derived virus (ODV). These data indicated that bm35 is a functional gene in the BmNPV life cycle.

Keywords

References

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