Enhancing recombinant protein quality and yield by protein stability profiling.

Area of Science:

• Biochemistry
• Protein Science
• Pharmaceutical Development

Background:

• Reliable production of stable, high-quality proteins is crucial for pharmaceutical research and development.
• Protein engineering and altering process conditions are common strategies to overcome production challenges.
• Existing methods often require extensive purification or result in non-native protein forms.

Purpose of the Study:

• To present an alternative strategy for maximizing wild-type protein stability by altering process conditions.
• To demonstrate the utility of ThermoFluor thermal stability assays in guiding protein production strategies.
• To improve the yield and quality of pharmaceutical proteins through optimized purification.

Main Methods:

• Implementation of ThermoFluor, a miniaturized 384-well thermal stability assay.
• Systematic analysis of various solution conditions (pH, buffer, salt, metals, surfactants, excipients) on protein stability.
• Generation of protein stability profiles (PSPs) for specific protein targets.

Main Results:

• ThermoFluor assays effectively monitored solution-dependent changes in protein stability.
• Identification of optimal and detrimental conditions for protein production.
• Development of two PSPs for kinase catalytic domains (Akt-3 and cFMS).

Conclusions:

• Information from ThermoFluor PSPs led to modified purification strategies.
• Altered purification strategies significantly improved protein yield and quality.
• This approach offers a valuable tool for optimizing pharmaceutical protein production.