Pro-Hyp-Gly Polypeptide Adsorbent for Blood Factor Purification
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Affinity chromatography for purifying blood coagulation and cell adhesion factors faces challenges such as ligand degradation, use of animal-derived materials, harsh elution conditions, and high costs, necessitating a method for purification under mild conditions with high affinity and resistance to deterioration.
Innovation Solution
A polypeptide with a repetition structure of Pro-Hyp-Gly is used as an adsorbent, allowing for high-affinity adsorption and mild desorption of blood coagulation and cell adhesion factors, eliminating the need for animal-derived materials and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If protein-based ligands are used in affinity chromatography, then high selectivity and affinity are achieved, but ligand degradation occurs due to alkaline washing, protease attack, or inherent weakness
Solution Approach 1:
The patent creates a synthetic polypeptide copy that mimics the functional properties of natural collagen (the original protein ligand) but with improved stability. The synthetic polypeptide contains repeating Pro-Hyp-Gly sequences that replicate collagen's triple-helical structure and binding capabilities, while being resistant to protease degradation and alkaline conditions that degrade natural proteins.
Solution Approach 2:
The patent combines synthetic polypeptide material with solid support materials to create a composite adsorbent system. This composite structure integrates the high affinity and selectivity of protein-based ligands with the structural stability and resistance to degradation provided by synthetic polymer matrices, achieving both high binding performance and ligand durability.
2Reliability
If animal-derived gelatin is used as ligand material, then affinity chromatography can be performed, but safety concerns arise due to potential zoonosis such as Bovine Spongiform Encephalopathy
Solution Approach 1:
The patent creates a synthetic polypeptide copy that replicates the functional properties of animal-derived gelatin and collagen without using animal materials. The synthetic polypeptide contains repeating Pro-Hyp-Gly sequences that mimic collagen's structure and binding capabilities, providing the same purification effectiveness while eliminating all animal origin and associated zoonosis risks.
Solution Approach 2:
The patent employs synthetic polypeptide materials that can be produced indefinitely without animal sources, replacing finite animal-derived materials. This synthetic approach provides a sustainable, safe, and ethically acceptable alternative that eliminates dependence on animal products while maintaining purification effectiveness.
3Productivity
If high affinity ligands are used, then efficient purification is achieved, but harsh elution conditions are required which may cause protein degradation and increase costs
Solution Approach 1:
The patent modifies the binding interaction parameters by designing synthetic polypeptides with specific repeating sequences that provide high affinity through multiple weak interactions rather than strong single bonds. This allows the target protein to bind tightly during purification but be eluted under milder conditions by disrupting these weaker, cumulative interactions without requiring harsh chemicals or extreme pH that would degrade the protein.
Solution Approach 2:
The patent creates localized binding sites within the synthetic polypeptide structure where specific amino acid sequences provide high affinity interactions. These localized high-affinity regions are distributed throughout the polypeptide chain, allowing efficient capture while the overall structure remains amenable to milder elution conditions compared to uniform high-affinity ligands.
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 polypeptide adsorbent enables efficient and cost-effective purification of these factors under mild conditions, preventing degradation and ensuring high affinity and stability, thus overcoming the limitations of traditional affinity chromatography.
Implementation Method 1
A polypeptide with a repetition structure of Pro-Hyp-Gly is used as an adsorbent, allowing for high-affinity adsorption and mild desorption of blood coagulation and cell adhesion factors
Implementation Method 2
A polypeptide with a repetition structure of Pro-Hyp-Gly is used as an adsorbent, allowing for high-affinity adsorption and mild desorption of blood coagulation and cell adhesion factors
Data Source
AI summary
An objective of the invention is to provide an adsorbent allowing purification of a blood coagulation factor or a cell adhesion factor under mild conditions, according to simple procedures, and at a low cost and safely while having a high affinity and a high resistance to deterioration, and a method for purifying the blood coagulation factor or the cell adhesion factor; a solution is to apply a polypeptide having peptide fragments represented by formula (1) as the adsorbent for the blood coagulation factor or the cell adhesion factor, and to purify the blood coagulation factor or the cell adhesion factor using the adsorbent:-(Pro-Hyp-Gly)n-Wherein, in formula (1), n is an integer from 2 to 9,000.