[The identification of BmNPV gp64 envelope gene]

Area of Science:

• Virology
• Molecular Biology
• Genetics

Background:

• The gp64 glycoprotein is the sole membrane glycoprotein encoded by the baculovirus genome.
• It features a signal peptide, transmembrane anchor, and ectodomain, crucial for baculovirus function.
• The gp64 gene's sequences from AcMNPV are utilized in baculovirus expression systems.

Purpose of the Study:

• To determine the nucleotide sequence of the Bombyx mori nucleopolyhedrovirus (BmNPV) gp64 gene.
• To compare the BmNPV gp64 gene with the homologous Autographa californica multiple nucleopolyhedrovirus (AcMNPV) gp64 gene.

Main Methods:

• Utilized a 1.3 kb AcMNPV gp64 gene coding sequence as a probe for hybridization.
• Determined the nucleotide sequence of the BmNPV gp64 gene.
• Performed computer analysis to compare nucleotide and predicted amino acid sequences.

Main Results:

• Identified a 1530 nucleotide open reading frame in the BmNPV gp64 gene, encoding a 509 amino acid polypeptide.
• The BmNPV gp64 gene shares 84.3% nucleotide sequence identity with the AcMNPV gp64 gene.
• Predicted amino acid sequences show a high 94.7% identity between BmNPV and AcMNPV gp64.

Conclusions:

• The BmNPV gp64 gene sequence has been elucidated.
• High sequence similarity suggests conserved function of gp64 across different baculoviruses.
• Findings support the potential application of BmNPV gp64 elements in baculovirus expression vector development.