Recombinant Vitamin K Protein Expression via TCA Cycle Intermediates
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Solution Overview
Problem
Current methods for expressing recombinant vitamin K-dependent proteins in cell culture face challenges in achieving high yields and biological activity.
Innovation Solution
Supplementing the cell culture with L-glutathione or TCA cycle intermediates such as alpha-ketoglutaric acid, succinic acid, oxaloacetic acid, malic acid, fumaric acid, and citric acid significantly increases the yield and biological activity of recombinant vitamin K-dependent proteins.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional cell culture methods are used for expressing recombinant vitamin K-dependent proteins, then the expression process is simple, but the yield and biological activity of the protein are low
Solution Approach 1:
The patent applies parameter changes by modifying the chemical composition of the cell culture medium. Specifically, it replaces conventional glutamine-based supplements with alternative carbon sources including TCA cycle intermediates (such as alpha-ketoglutarate, succinate, fumarate, malate, oxaloacetate, and citrate) and/or lactate. This compositional parameter change leads to improved protein yield and biological activity while maintaining a relatively simple medium formulation approach.
2Reliability
If conventional cell culture methods are used for expressing recombinant vitamin K-dependent proteins, then the culture medium composition is standard, but the biological activity of the expressed protein is reduced
Solution Approach 1:
The patent modifies cultural parameters by changing the carbon source composition in the cell culture medium. The use of TCA cycle intermediates and lactate instead of or in addition to glutamine creates a metabolic environment that enhances the biological activity of expressed vitamin K-dependent proteins, while keeping the overall cultural conditions straightforward and easily implementable.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The use of L-glutathione or TCA cycle intermediates in the cell culture medium enhances the production and activity of recombinant vitamin K-dependent proteins, addressing the limitations of existing expression methods.
Implementation Method 1
Supplementing the cell culture with L-glutathione or TCA cycle intermediates such as alpha-ketoglutaric acid, succinic acid, oxaloacetic acid, malic acid, fumaric acid, and citric acid significantly increases the yield and biological activity of recombinant vitamin K-dependent proteins
Data Source
AI summary
The present invention relates to a method for increasing the activity and/or the yield of a recombinant vitamin K-dependent protein expressed in cell culture. The present invention further relates to uses and compositions of matter.