Modified Trityl Linkers for Full-Length Biopolymer Capture
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Solution Overview
Problem
Current methods for synthesizing and purifying synthetic biopolymers, such as oligonucleotides and polypeptides, face challenges in scalability, efficiency, and purity, particularly for modified chemistries or unconventional backbones, with existing purification techniques like trityl-on methods showing limited selectivity and leading to incomplete removal of truncated sequences.
Innovation Solution
The use of modified trityl protecting groups with selectively-reactive linker moieties that allow for the capture and release of full-length biopolymers using complementary linker moieties on a capture support, enabling purification in aqueous media and reducing the need for toxic solvents, with methods adaptable to various biopolymer chemistries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If solid-phase synthesis method is used for oligonucleotide production, then the polymer can be elongated through sequential monomer addition, but incomplete coupling and capping lead to truncated failure sequences that accumulate and reduce full-length product purity
Solution Approach 1:
The patent segments the purification process into two distinct stages: (1) removal of truncated sequences using exonucleases that specifically degrade incomplete oligonucleotides, and (2) recovery of the full-length product. This segmentation allows the synthesis to proceed at high throughput while addressing purity concerns in a dedicated subsequent step, rather than trying to achieve both simultaneously in the synthesis cycle.
Solution Approach 2:
The patent introduces exonucleases as intermediary agents that selectively recognize and degrade truncated oligonucleotide sequences. These enzymes act as mediators between the crude synthesis mixture and the purified final product, enabling selective removal of impurities without affecting the full-length oligonucleotides. The intermediary enzyme facilitates the separation process by chemically transforming the unwanted truncated sequences into removable fragments.
2Manufacturing precision
If traditional purification methods are used to remove truncated sequences, then some purity can be achieved, but the methods are time-consuming and reduce overall synthesis efficiency
Solution Approach 1:
The patent replaces traditional mechanical or chemical purification methods (such as chromatography or gel electrophoresis) with an enzymatic system. Instead of using physical separation techniques that require complex equipment and lengthy procedures, the invention employs exonucleases that naturally and rapidly degrade truncated sequences through biochemical reactions, significantly reducing purification time while maintaining high effectiveness.
Solution Approach 2:
The patent implements a self-service purification mechanism where exonucleases automatically and selectively degrade truncated oligonucleotide sequences without requiring external intervention or complex processing. The enzymes inherently recognize the structural differences between truncated and full-length sequences, performing the purification task autonomously through their catalytic activity, thereby eliminating the need for time-consuming manual purification steps.
3Quantity of substance
If coupling efficiency is increased to reduce truncated sequences, then more full-length product is obtained, but the cost and complexity of the synthesis process increase
Solution Approach 1:
The patent introduces exonucleases as intermediary agents that selectively recognize and degrade truncated oligonucleotide sequences. These enzymes act as mediators between the crude synthesis mixture and the purified final product, enabling selective removal of impurities without affecting the full-length oligonucleotides. The intermediary enzyme facilitates the separation process by chemically transforming the unwanted truncated sequences into removable fragments.
Solution Approach 2:
The patent changes the chemical parameters of the purification process by using enzymatic reactions instead of traditional chemical or physical methods. This parameter change allows for selective degradation of truncated sequences under mild conditions that preserve the full-length oligonucleotides, achieving high purity without requiring extreme pH, temperature, or solvent conditions that would increase process complexity.
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 approach enhances yield, reduces costs, and increases purity while minimizing environmental impact, facilitating high-throughput synthesis and purification of biopolymers, including oligonucleotides, suitable for therapeutic and diagnostic applications.
Implementation Method 1
modified trityl protecting groups with selectively-reactive linker moieties that allow for the capture and release of full-length biopolymers using complementary linker moieties on a capture support
Implementation Method 2
reacting the reactive biopolymeric compound with a solid support comprising a reactive oxyamino group, a reactive hydrazino group, a reactive carbonyl group, or a component of a click reaction to selectively bind the reactive biopolymeric compound to the solid support
Data Source
AI summary
The present disclosure provides reagent compounds, reactive biopolymeric compounds, and methods of making and using these materials for the rapid and efficient synthesis and purification of biopolymeric compounds at low cost. The materials and methods yield highly pure synthetic biopolymeric compounds, including synthetic oligonucleotides and polypeptides, and reduce or eliminate the need for toxic solvents in the synthetic process.