Branched Insoluble Support for High-Purity Long Peptide Synthesis
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Solution Overview
Problem
Existing solid phase peptide synthesis methods face challenges in increasing reactor throughput and yield for long polypeptides while maintaining purity, as swelling and solvation issues affect reaction site accessibility and solvent consumption.
Innovation Solution
An insoluble support is developed by modifying a polymeric matrix with constructs comprising branching agents, cleavable linkers, and spacers, which increase binding sites and reduce solvent consumption without increasing reactor volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the loading of the resin is increased to increase yield, then the capacity of the insoluble support increases, but the purity of the synthesized peptide deteriorates
Solution Approach 1:
The invention segments the binding sites by creating a heterogeneous distribution of loading across different resin beads. Some beads have high loading while others have low loading, which prevents the negative effects of high loading (purity deterioration) while maintaining the benefits (increased capacity). This is achieved by controlling the coupling conditions to create a segmented loading pattern rather than uniform high loading throughout the resin.
Solution Approach 2:
The invention applies local quality by creating regions of different loading densities within the resin support. The coupling reaction is controlled to produce beads with varying numbers of binding sites, so that local regions with appropriate loading can be optimized for both capacity and purity, rather than requiring the entire resin to have uniformly high loading.
2Ease of operation
If the swelling of the solid phase is increased to improve solvation and reaction site accessibility, then the accessibility of reagents improves, but the reactor volume required increases
Solution Approach 1:
The invention changes the physical-chemical parameters of the resin support by selecting polymeric matrices with different swelling characteristics. Resins with moderate swelling properties are chosen, and the coupling conditions are optimized to achieve adequate solvation without requiring excessive swelling. This parameter optimization allows maintaining reaction site accessibility while controlling the reactor volume requirement.
3Productivity
If the number of binding sites is increased to increase capacity, then the yield increases, but the synthesis of long polypeptides becomes more difficult
Solution Approach 1:
The invention segments the high capacity across multiple beads with moderate loading rather than using a single bead type with uniformly high loading. This segmentation reduces the complexity of synthesizing long polypeptides because each individual bead presents a more manageable loading level, while the overall system achieves high capacity through the collective contribution of many beads.
Solution Approach 2:
The invention applies partial action by using moderate loading on individual beads rather than excessive high loading. This partial loading approach on each bead simplifies the synthesis of long polypeptides, while the overall capacity is sufficiently high due to the large number of beads used in the reaction vessel.
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 insoluble support enhances reactor throughput and yield of long polypeptides with high purity by optimizing swelling and solvation, reducing solvent use, and enabling the synthesis of complex polypeptides with more than 25 amino acids.
Implementation Method 1
the swelling and solvation of the solid phase are important properties
Implementation Method 2
the swelling and solvation of the solid phase are important properties
Data Source
AI summary
The present invention relates to an insoluble support comprising distal binding sites, the support comprising a homogeneous polymeric matrix and constructs, the constructs covalently bound to the polymeric matrix, wherein the constructs comprise at least one branching agent selected from aminoalkanoic acids comprising at least 2 amino groups and from 3 up to 10 carbon atoms, cleavable linkers and at least one spacer coupled to at least one branching agent via an amide bond, the cleavable linkers providing the distal binding sites.