Protein expression in the Drosophila Schneider 2 cell system

Area of Science:

• * Molecular Biology
• * Cell Biology
• * Biochemistry

Background:

• * The Schneider-2 (S2) Drosophila cell line is a widely used tool in biological research.
• * Stable overexpression of recombinant proteins is crucial for studying protein function and interactions.
• * Existing methods may have limitations in achieving high and consistent protein yields.

Purpose of the Study:

• * To evaluate the suitability of the Schneider-2 (S2) Drosophila cell line for stable recombinant protein overexpression.
• * To quantify the expression levels of various recombinant proteins in S2 cells.
• * To establish S2 cells as a reliable system for producing functional proteins.

Main Methods:

• * Utilization of plasmid-based protein expression vectors for gene delivery.
• * Application of drug selection to establish stable polyclonal S2 cell lines.
• * Induction of protein expression under specific conditions.

Main Results:

• * S2 cells demonstrated stable overexpression of recombinant proteins.
• * Expression levels ranged from 2 to 100 pmol/mg membrane protein for G-protein coupled receptors.
• * Expression levels reached 4,000 to 100,000 sites/cell for other membrane receptors and 3 to 35 mg/liter for soluble/secreted proteins.

Conclusions:

• * The Schneider-2 (S2) Drosophila cell line is highly effective for stable, high-level recombinant protein expression.
• * This system provides robust yields suitable for various protein types, including membrane and secreted proteins.
• * S2 cells represent a valuable platform for producing recombinant proteins for biochemical and structural studies.