Protein expression is a fundamental process in biotechnology and molecular biology, essential for various applications ranging from research to therapeutic protein production. The Escherichia coli (E. coli) protein expression system is the most widely used and cost-effective platform due to its clear genetic background, rapid cell proliferation, high protein expression levels, good stability, and low cost. This blog post explores the benefits, delivery standards, and case studies of Hzymes Biotech’s prokaryotic protein expression system services.

1.Introduction to Prokaryotic Protein Expression Systems
2.Advantages of E. coli Protein Expression System
3.Hzymes Biotech’s Comprehensive Service Offerings
4.Delivery Standards and Quality Assurance
5.Case Studies
    – Case 1: Expression and Purification of Large and Small Subunit Complexes
    – Case 2: High-Throughput Screening of Protein Refolding Conditions and Quality Control
6.Conclusion

Introduction to Prokaryotic Protein Expression Systems

Prokaryotic protein expression systems, particularly those utilizing E. coli, are foundational in the field of biotechnology. These systems are pivotal for producing recombinant proteins, which are proteins encoded by recombinant DNA that has been cloned in a system that supports the expression of the gene and translation of mRNA.

Overview of E. coli Protein Expression System

The E. coli expression system is preferred due to its simplicity, efficiency, and the extensive understanding of its genetics and physiology. This system is adept at producing large quantities of protein rapidly, making it ideal for both research and industrial applications.

Advantages of E. coli Protein Expression System

The E. coli protein expression system offers several advantages:

– Clear Genetic Background: E. coli’s genetics are well-understood, facilitating gene manipulation.
– Fast Cell Proliferation: E. coli cells divide rapidly, leading to quick production cycles.
– High Protein Expression Level: This system can produce large amounts of protein.
– Good Stability: Proteins expressed in E. coli are generally stable.
– Low Cost: It is a cost-effective method for protein production.
– Short Cycle: The entire process from gene cloning to protein purification can be completed in a relatively short time.
– Versatility: Suitable for the expression of proteins from multiple genera.

Hzymes Biotech’s Comprehensive Service Offerings

Hzymes Biotech provides a comprehensive one-stop service for protein expression using the E. coli system. Their services encompass the entire process, ensuring high-quality outcomes tailored to specific research or industrial needs.

Codon Optimization

Codon optimization involves modifying the DNA sequence to match the preferred codon usage of E. coli without changing the protein sequence. This enhances the efficiency of protein expression.

Expression and Purification

Hzymes Biotech offers services from initial expression trials to large-scale protein purification. They utilize advanced techniques to ensure high yield and purity.

Large-Scale Preparation of Recombinant Proteins

For industrial applications, large-scale preparation of recombinant proteins is crucial. Hzymes Biotech ensures that the proteins are produced consistently and with high quality.

Additional Services

– Endotoxin Removal: Essential for therapeutic applications to ensure that the proteins are safe for use in humans.
– High-Throughput Screening: For optimizing expression and refolding conditions.

Delivery Standards and Quality Assurance

Hzymes Biotech adheres to stringent delivery standards to ensure the highest quality of service. Their platform is optimized for efficient protein expression and purification, incorporating state-of-the-art technologies and methodologies.

Quality Assurance

– Purity Assessment: Ensuring that the expressed proteins meet the desired purity levels.
– Activity Assays: Verifying that the proteins retain their functional activity.
– Process Optimization: Continuous refinement of the expression and purification processes to maximize yield and functionality.

Delivery Standard

Case

Case 1: Expression and purification of the large and small subunit complexes
Case Description: A customer needs soluble expression of a high-molecular-weight protein, which is composed of two subunits of different molecular weight and a tag that may affect its biological activity. Hzymes Biotech utilized chromatography process optimization without using a tag and finally screened suitable expression and purification conditions, finally the target protein achieved soluble expression with > 98% purity and good functionality.


 

Hzymes Biotech utilized chromatography process optimization without using a tag. They screened suitable expression and purification conditions, ultimately achieving soluble expression with over 98% purity and maintaining good functionality.

– One-step and Two-step Chromatography: The optimization process ensured efficient purification.
– Lane S: Shows the protein expression amount in the supernatant and after 1-2 steps of chromatography/purification.
– Three-step Chromatography: Further purification stages to enhance purity and functionality.
    – Lane M: Molecular weight marker.
    – Lane S: Supernatant of cell lysate.
    – Lane E1: Elution of first chromatography.
    – Lane E2: Elution of second chromatography.
    – Lane E3: Elution of third chromatography.

Case 2: High-throughput screening of protein refolding conditions and quality control

Case Description: A customer had high requirements for renaturation efficiency and activity of inclusion body protein,at the same time, there was also a need for amplification preparation in the later stage. Hzymes used the platform based variable renaturation screening process to conduct high-throughput screening and process monitoring of the denaturation and renaturation of the protein, finally explored and amplified degeneration process conditions, protein purity > 95% after refolding and purification, protein activity can meet customer expectations.

High-throughput screening

Renaturation condition optimization

Conclusion

The E. coli protein expression system remains a cornerstone in biotechnology for producing recombinant proteins due to its efficiency, cost-effectiveness, and versatility. Hzymes Biotech offers a comprehensive suite of services, from codon optimization to large-scale protein preparation, ensuring high-quality outcomes tailored to specific needs. Their commitment to quality assurance and process optimization makes them a reliable partner for all protein expression requirements.

By leveraging advanced techniques and technologies, Hzymes Biotech ensures that their services not only meet but exceed customer expectations, making significant contributions to research and industrial applications in biotechnology.

In the future, Hzymes biotech will always remember its original intention and persist in meticulous cultivation in the IVD field. It will adhere to independent research and development, accelerate the construction of a world-class specialty enzyme production platform, and achieve import substitution of core enzyme raw materials in the field of biomedicine in China. It will collaborate with leading biopharmaceutical companies to expand their global presence and contribute to the advancement of the industry.