Cell Extract Purification for Cell-Free Protein Synthesis
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for protein purification and interaction analysis are inefficient, leading to low purity proteins and high loss of target proteins, especially in structural and functional analyses, and are plagued by pseudo-positive results due to nonspecific binding.
Innovation Solution
A method using a cell extract for cell-free protein synthesis that involves contacting the extract with an affinity support to remove bound substances without impairing protein synthetic activity, followed by protein synthesis and purification using the same or similar affinity support for high-efficiency purification and interaction analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple purification steps are performed to achieve high protein purity, then protein purity is improved, but protein loss increases and operational complexity increases
Solution Approach 1:
The invention segments the purification process into two distinct stages: (1) removal of substances that bind to the affinity support during cell extract preparation, and (2) purification of the synthesized protein using the same affinity support. This segmentation allows each stage to be optimized independently, achieving high protein purity while minimizing protein loss through selective binding characteristics.
Solution Approach 2:
The invention applies preliminary action by removing substances that bind to the affinity support during the cell extract preparation stage, before protein synthesis occurs. This preliminary removal of interfering substances ensures that subsequent protein purification using the same affinity support is more efficient and results in higher protein purity with reduced loss.
2Manufacturing precision
If multiple purification steps are performed to achieve high protein purity, then protein purity is improved, but operational complexity increases
Solution Approach 1:
The invention applies universality by using the same affinity support for both removing interfering substances during cell extract preparation and for purifying the synthesized protein. This multi-functional use of the affinity support simplifies the overall process by reducing the number of different materials and steps required, thereby decreasing operational complexity while maintaining high protein purity.
3Manufacturing precision
If affinity support is used to bind substances for purification, then protein purity is improved, but protein synthetic activity may be impaired
Solution Approach 1:
The invention applies the taking out principle by selectively removing only the substances that bind to the affinity support during cell extract preparation, while leaving the protein synthetic components intact. The affinity support is designed to selectively bind interfering substances rather than essential proteins, thus maintaining protein synthetic activity while achieving purification.
Solution Approach 2:
The invention uses the affinity support as an intermediary that selectively interacts with interfering substances during cell extract preparation. By acting as a mediator that removes harmful substances without directly contacting or deactivating the protein synthetic machinery, the affinity support enables purification while preserving protein synthetic activity for subsequent steps.
4Productivity
If cell extract is contacted with affinity support to remove bound substances, then purification efficiency is improved, but protein synthetic activity may be reduced
Solution Approach 1:
The invention applies local quality by ensuring that the affinity support has specific binding characteristics tailored to interfere with only certain substances (those that bind to the affinity support) while having minimal effect on protein synthetic components. The local binding properties of the affinity support are optimized to achieve high purification efficiency without broadly affecting protein synthesis.
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
This method achieves high-purity protein synthesis and efficient interaction analysis by maintaining protein synthetic activity and reducing protein loss, thereby enhancing the accuracy and efficiency of structural and functional analyses.
Implementation Method 1
contacting a cell extract having a protein synthetic activity with an affinity support having an affinity to a protein to be synthesized using the extract, and removing substances bound to the affinity support from the cell extract
Data Source
AI summary
A cell extract for cell-free protein synthesis is produced by removing substances, which bind to an affinity support to be used in purification or interaction analysis, from a cell extract having protein synthetic activity. Then, a target protein is synthesized by using the cell extract for cell-free protein synthesis. The synthesized target protein can be purified by using the affinity support and used in interaction analysis.