Transcriptome analyses of insect cells to facilitate baculovirus-insect expression

Area of Science:

• Molecular Biology
• Insect Cell Culture
• Biotechnology

Background:

• The High Five cell line (BTI-TN-5B1-4) from Trichoplusia ni is crucial for baculovirus-mediated recombinant protein expression.
• Its genomic background and full potential for protein expression remain inadequately characterized.
• Understanding these aspects is vital for optimizing biopharmaceutical production.

Purpose of the Study:

• To sequence and analyze the transcriptome of the High Five insect cell line.
• To assess its codon usage capacity for expressing proteins from various origins.
• To identify genes related to glycosylation and predict signal peptides for protein expression optimization.

Main Methods:

• High-throughput transcriptome sequencing of High Five cells.
• Bioinformatic assembly of transcripts.
• Codon usage bias analysis.
• Profiling of glycosylation-related genes.
• Prediction of signal peptides for abundant transcripts.

Main Results:

• Assembly of 25,234 transcripts from High Five cells.
• Demonstration of robust codon usage capacity, suitable for eukaryotic and prokaryotic proteins.
• Identification of genes involved in glycosylation pathways.
• Prediction of signal peptides for highly expressed transcripts in High Five and Sf21 cell lines.

Conclusions:

• The High Five cell line possesses a strong codon usage capacity, enhancing its utility for diverse recombinant protein expression.
• Transcriptome data provides valuable insights into glycosylation and secretion mechanisms, enabling targeted engineering of proteins.
• This research offers a foundation for optimizing the production of complex secretory and membrane proteins using insect cell technology.