Peptide Purification via Sulfonate Salt Precipitation
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Solution Overview
Problem
Current methods for purifying target peptides from peptide synthesis products face challenges due to the similarity in physicochemical properties between target peptides and analogue peptides, making their separation difficult, especially when analogue peptides contaminate the target peptide, and existing purification methods like preparative HPLC are costly and inefficient.
Innovation Solution
A method involving the use of a sulfonic acid compound in a solvent to facilitate solid-liquid separation, which increases the purity of the target peptide by forming a sulfonate salt with reduced analogue peptide ratios, thereby improving the separation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If preparative high performance liquid chromatography is used for peptide purification, then purification effectiveness is improved, but cost increases significantly
Solution Approach 1:
The invention changes the chemical parameter by introducing sulfonic acid compounds that form sulfonate salts with basic amino acid residues. This chemical modification enables selective precipitation of target peptides containing basic residues (lysine, arginine, histidine) while leaving analogue peptides in solution, achieving effective separation without costly HPLC equipment
Solution Approach 2:
The sulfonic acid compound acts as an intermediary substance that mediates the separation process. By forming sulfonate salts with basic amino acid residues in the target peptide, it creates a distinguishable chemical state that enables selective solid-liquid separation, replacing the need for expensive chromatographic intermediaries
2Manufacturing precision
If conventional purification methods are used, then separation is attempted, but difficulty arises due to similar physicochemical properties of analogue peptides
Solution Approach 1:
The invention introduces a new chemical parameter (sulfonate salt formation) that creates a fundamental difference between target peptides and analogue peptides. By exploiting the presence of basic amino acid residues in target peptides, the method transforms chemically similar molecules into distinguishable species through selective salt formation, enabling easy separation by solid-liquid filtration
Solution Approach 2:
The method segments the peptide mixture into two distinct phases: sulfonate salt precipitates (target peptides with basic residues) and soluble components (analogue peptides without basic residues). This segmentation based on chemical reactivity differences simplifies the separation of previously indistinguishable components
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 effectively increases the purity of the target peptide by enhancing the separation of the target peptide from analogue peptides, providing a more efficient and cost-effective alternative to conventional purification methods.
Implementation Method 1
mixing the peptide product with a solvent in the presence of a sulfonic acid compound to provide a solid product comprising the sulfonate salt of the target peptide
Data Source
AI summary
A method for purifying a target peptide may include mixing a peptide product obtained through a peptide synthesis with a solvent in the presence of a sulfonic acid compound to obtain a solid; and performing a solid-liquid separation to collect the solid.