A Streptomyces-Based Cell-Free Protein Synthesis System for High-Level Protein Expression

Area of Science:

• Biotechnology
• Molecular Biology
• Synthetic Biology

Background:

• Cell-free protein synthesis (CFPS) systems are crucial for in vitro protein expression.
• Existing CFPS systems, including newly developed Streptomyces-based ones, can be limited by insufficient translation-related elements in cell lysates.
• This limitation hinders protein translation efficiency and overall CFPS system productivity.

Purpose of the Study:

• To enhance the productivity of a novel Streptomyces-based cell-free protein synthesis (CFPS) system.
• To investigate the impact of supplementing translation-related factors on protein yield.
• To optimize the Streptomyces CFPS system for improved in vitro protein expression.

Main Methods:

• Preparation of Streptomyces cell extracts.
• Expression and purification of nine key translation-related factors.
• Optimization of the Streptomyces-based CFPS reaction conditions for enhanced protein production.

Main Results:

• Supplementation with translation factors significantly improved protein yield.
• Achieved a substantial increase in EGFP protein yield, reaching approximately 400 μg/mL.
• Demonstrated the effectiveness of the optimized Streptomyces CFPS system for high-yield protein expression.

Conclusions:

• The addition of specific translation factors is a viable strategy to overcome limitations in cell-free protein synthesis (CFPS) systems.
• The optimized Streptomyces-based CFPS system shows significantly enhanced protein expression capabilities.
• This work contributes to advancing cell-free biotechnology for efficient in vitro protein production.