High-Level Expression and Purification of Human CD81 Protein
Author Information
Author(s): Takayama Hidehito, Chelikani Prashen, Reeves Philip J., Zhang Shuguang, Khorana H. Gobind
Primary Institution: Massachusetts Institute of Technology
Hypothesis
Can a tetracycline-inducible system be used for high-level expression and purification of the human CD81 protein?
Conclusion
The study successfully demonstrated a method for high-level expression and purification of the CD81 membrane protein, which could aid in structural analyses.
Supporting Evidence
- The CD81 receptor was purified to >95% purity using a single-step immunoaffinity method.
- The affinity of the purified CD81 receptor for HCV-E2 protein was determined to be 3.8±1.2 nM.
- Confocal microscopy confirmed that the CD81 receptor was correctly localized on the plasma membrane.
Takeaway
The researchers found a way to make a lot of a special protein called CD81, which is important for studying diseases like Hepatitis C.
Methodology
The study used a tetracycline-inducible stable mammalian cell line for high-level expression and a single-step rho-1D4-affinity purification method.
Limitations
The study does not address potential post-translational modifications that may affect the protein's function.
Digital Object Identifier (DOI)
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