An efficient protocol to enhance recombinant protein expression using ethanol in Escherichia coli

Area of Science:

• Biotechnology
• Molecular Biology
• Protein Expression

Background:

• Bacterial cells, like Escherichia coli (E. coli), are engineered to produce recombinant proteins for biotechnological and pharmaceutical applications.
• Achieving high levels of recombinant protein expression in E. coli can be challenging, often limited by low expression yields, even when induced with isopropyl β-d-1-thiogalactopyranoside (IPTG).
• Existing strategies to enhance protein expression, including host/vector modification and co-expression, have limitations and protein expression remains a critical bottleneck.

Purpose of the Study:

• To present a straightforward and cost-effective protocol for enhancing recombinant protein expression in E. coli.
• To demonstrate the universal applicability of the method across different proteins and expression systems (T5 and T7 promoters).
• To overcome the limitations of current protein expression enhancement techniques.

Main Methods:

• Development and optimization of a novel, simple protocol to boost recombinant protein yields.
• Validation of the method using several unrelated proteins expressed in E. coli.
• Application of the protocol with both T5 and T7 promoter systems.

Main Results:

• The protocol achieves a significant, several-fold increase in the expression of poorly or non-expressed recombinant proteins.
• The method does not require additional components like chaperones or co-expression of other genes.
• The technique is inexpensive, easy to manage, universal, quick, and does not necessitate commercial kits.

Conclusions:

• The developed protocol offers a highly effective solution for enhancing recombinant protein expression in E. coli.
• This method simplifies and improves the critical expression step in recombinant protein production.
• The technique's universality and cost-effectiveness make it valuable for various protein production applications.