Improving the Intensity of Integrated Expression for Microbial Production.

Area of Science:

• Synthetic Biology
• Metabolic Engineering
• Microbial Biotechnology

Background:

• Plasmid-mediated gene expression in industrial fermentation presents challenges like metabolic burden and genetic instability.
• Advancements in genome engineering facilitate chromosomal gene integration, making it a preferred method for recombinant protein production.
• Enhancing heterologous gene expression at the host genome level is crucial for efficient industrial bioproduction.

Purpose of the Study:

• To summarize the principles and characteristics of genomic integration for industrial applications.
• To highlight strategies for improving heterologous gene expression via chromosomal integration.
• To review the applications of integrated gene expression in microbial bioproduction and gene function studies.

Main Methods:

• Review of existing literature on genomic integration principles and techniques.
• Analysis of strategies for enhancing gene expression, including chassis cell optimization, regulatory element design, gene dosage control, and site selection.
• Compilation of studies on the application of integrated expression in industrial microorganisms and gene function exploration.

Main Results:

• Genomic integration is a viable and increasingly adopted strategy for industrial bioproduction.
• Key strategies for enhancing expression include optimizing the host cell, fine-tuning expression cassettes, managing gene copy number, and selecting appropriate integration loci.
• Integrated expression has proven effective for both industrial production and understanding gene function.

Conclusions:

• Chromosomal integration offers a robust platform for industrial fermentation, overcoming limitations of plasmid-based systems.
• Systematic optimization of host, expression elements, gene dose, and integration site is essential for maximizing heterologous gene expression.
• This review provides a comprehensive reference for applying integrated gene expression in microbial engineering and bioproduction.