HEK293 Lysate Cell-Free Protein Synthesis (CFPS) for Human Protein Expression

The HEK293 Lysate Cell-Free Expression System is a cutting-edge platform for synthesizing complex human proteins in vitro. Derived from human embryonic kidney cells, this system provides a native eukaryotic environment, retaining the necessary translational and post-translational machinery to produce proteins with authentic human folding, disulfide bond formation, and, critically, endogenous glycosylation capabilities.

CD Biosynsis offers a specialized HEK293 CFPS Service for the rapid production of high-value biopharmaceuticals and complex research tools. This system excels where traditional systems (like E. coli or even Rabbit Reticulocyte Lysate) fail, particularly for targets requiring native human PTMs or those that are inherently cytotoxic. We leverage the system's ability to express proteins in an open format, allowing for direct control over folding conditions and the integration of novel elements, significantly accelerating the pipeline for therapeutic antibodies, human cytokines, and difficult-to-express membrane proteins.

Highlights

Unique advantages of utilizing the HEK293 Lysate CFPS System:

• Authentic Human PTMs: The native HEK293 machinery allows for human-like glycosylation and phosphorylation patterns, ensuring maximum biological activity for therapeutic proteins.
• Endogenous Microsomes: Retains components of the ER/Golgi (microsomes) required for native folding, disulfide bond formation, and transmembrane protein integration.
• High Speed and Control: Protein expression is achieved in hours, not days, and the open nature allows for precise concentration control of every component, including expensive cofactors.
• Best for Toxic Targets: Eliminates the viability issues associated with expressing toxic proteins in live cells, enabling the synthesis of cytotoxic fusion proteins or signaling molecules.

Applications

Critical applications where HEK293 CFPS excels for functional protein production:

Functional Antibody Fragments (scFv)

Rapid synthesis of scFvs and Fab fragments with correct disulfide bonds and native conformation for binding assays.

Complex Membrane Proteins

Direct expression and insertion of GPCRs, ion channels, or transporters into supplemented liposomes or nanodiscs.

High-Fidelity Drug Targets

Production of kinase, ubiquitin, and signaling proteins with human-relevant PTMs for high-specificity drug screening.

Non-natural Amino Acid Incorporation

Combines human PTMs capability with the flexibility of CFPS to incorporate nnAAs at specific sites for functionalization.

Key Features & Comparisons

How the HEK293 system provides advantages over other CFPS platforms:

Human Origin Lysate

Ensures the most native eukaryotic folding and PTM profile, minimizing immunogenic risk for therapeutic candidates.

Integrated PTM Machinery

Retains endogenous chaperones (HSP70), disulfide bond oxidases, and glycosylation enzymes.

High Expression Scale

Optimized for fed-batch and continuous exchange formats, supporting high-yield production required for structural studies (mg quantities).

Compatibility with DNA and mRNA

Can use either linear DNA (coupled T/T) or capped mRNA (direct translation), offering flexibility for project timelines.

Superior for Glycosylation

Provides a more human-relevant glycosylation profile compared to Wheat Germ or RRL microsomes.

Workflow

Our streamlined process for functional HEK293 CFPS protein production:

• Template Optimization: Gene sequence is optimized for HEK293 CFPS and prepared as a high-quality DNA or mRNA template.
• Reaction Setup: The template is combined with the high-activity HEK293 lysate, energy mix, and necessary supplements (e.g., lipids, cofactors).
• In Vitro Synthesis: The reaction is incubated for 4-24 hours at 30°C to 37°C for coupled synthesis, folding, and PTM.
• Purification and Quality Control (QC): Purification via affinity chromatography is performed. QC includes SDS-PAGE, protein quantification, and Mass Spectrometry (MS) to verify PTMs.
• Functional Delivery: Delivery of purified protein confirmed for high purity and native function, along with detailed COA.

We provide essential assurance for high-quality HEK293 expression outcomes:

• Guaranteed Disulfide Bond Formation: Confirmed oxidative folding for multi-cysteine proteins like Fabs and scFvs.
• PTM Verification: Dedicated MS analysis to confirm site-specific phosphorylation or glycosylation patterns.
• Functional Assay Support: Collaboration on downstream functional assays (e.g., SPR binding, enzyme kinetics) to ensure synthesized protein activity.
• Scalability and Yield: Capability to scale production to milligram quantities for structural or therapeutic applications.