Nucleotide sequence of Bombyx mori cytoplasmic polyhedrosis virus segment 8

Biochemical and Biophysical Research Communications
K HagiwaraT Yoshimura

Abstract

The segments 8 (S8) of the 10 double-stranded RNA genomes from Bombyx mori cytoplasmic polyhedrosis virus (BmCPV) strains I and H were converted into cDNAs, amplified by PCR, and cloned. The nucleotide sequence analysis of the two full-length S8 cDNAs showed that the segments consist of 1328 nucleotides encoding putative proteins (p44) of 390 amino acids with molecular masses of about 44 kDa, which have glutamic acid-rich and proline-rich domains in their central regions. They had quite high identity with each other: about 98% in nucleotide and amino acid sequences. The recombinant p44 expressed in BmN4 cells using the baculovirus vector was detected by immunoblot analysis. p44 was also confirmed with the same antiserum to be present in BmCPV-infected midgut cells, but not in polyhedra, virus virions and uninfected midgut cells, indicating that p44 is expressed as a nonstructural protein of BmCPV.

Citations

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