Expression and Distribution of White Spot Syndrome Virus ORF220 Gene in Insect Cells

White spot syndrome virus ORF220 encodes a protein homologous to the gp130 receptors of eukaryote. prcvious studies showed that this protein was a minor structural protein. In this paper, the ORF220 was cloned into the pFastBacI fused with EGFP gene and co-transfected with AcBacmid into DH10B cells. The recombinant Bacmid containing fused ORF220 and EGFP genes was confirmed by PCR and then transfected into Sf21 cells. The green fluorencence was observed 3-5 d post-transfection under the fluorescent microscopy and this confirmed that the fusion protein was expressed in insect cells. The supernatant of the transfected cells was used to infect the Sf21 cells and the time course observation showed that the ORF220 product localized in both the cytoplasm and nucleus with no predilection.