Chemical Tagging of m6A Sites to Reduce False-Positive Sequencing
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Solution Overview
Problem
Current antibody-based methods for m6A sequencing, such as MeRIP-seq, suffer from non-specific binding, leading to false positive results and high costs, making them unsuitable for large-scale experiments and in-depth biological studies.
Innovation Solution
A chemical tagging method using a thiol compound to convert m6A into hm6A, followed by reaction with MTSEA-biotin to enrich and detect m6A sites, utilizing the specificity of chemical reactions to avoid non-specific binding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If antibody-based methods (MeRIP-seq) are used for m6A sequencing, then enrichment of m6A modified RNA can be achieved, but non-specific binding occurs leading to false positive results and high costs
Solution Approach 1:
The patent replaces the biological antibody-based enrichment system with a chemical-based enrichment system. Specifically, it uses chemical reagents (such as boronic acid derivatives) that specifically bind to the hydroxymethyl group of hm6A through coordinate covalent bonding, substituting the antibody-antigen recognition mechanism with a chemical coordination mechanism that offers higher specificity and eliminates non-specific binding issues.
Solution Approach 2:
The patent changes the binding mechanism from biological recognition (antibody-antigen interaction) to chemical coordination (boronic acid-hydroxymethyl interaction). This parameter change in the binding chemistry allows for more specific and controllable enrichment of m6A modified RNA, reducing false positives while maintaining enrichment efficiency.
2Quantity of substance
If antibody-based methods are used for m6A sequencing, then m6A enriched regions can be obtained, but the cost is high and large-scale experiments are hindered
Solution Approach 1:
The patent employs small molecule chemical reagents (such as boronic acid derivatives) that are inexpensive to produce and can be used in large quantities without the high costs associated with antibody production and purification. These chemical reagents can be synthesized at scale, enabling cost-effective large-scale experiments and high-throughput m6A sequencing applications.
Solution Approach 2:
By replacing the expensive antibody-based system with a chemical reagent-based system, the patent significantly reduces the cost of m6A enrichment. The chemical reagents can be produced through standard chemical synthesis methods at much lower costs compared to antibody production, making large-scale and high-throughput experiments economically feasible.
3Reliability
If chemical methods are used for modified nucleic acid sequencing, then high specificity and enrichment efficiency can be achieved, but the reaction efficiency must be high due to low abundance of modified nucleic acid fragments
Solution Approach 1:
The patent uses composite chemical structures, specifically boronic acid derivatives that combine the boronic acid group (for specific binding to hydroxymethyl) with various aromatic or aliphatic moieties. This composite structure enhances both the specificity of binding to hm6A and the reaction efficiency, allowing effective enrichment even at low concentrations of modified nucleic acid fragments.
Solution Approach 2:
The patent optimizes reaction parameters such as pH, temperature, and reagent concentration to maximize the reaction efficiency between the chemical reagents and hm6A. By controlling these parameters, the patent ensures high reaction efficiency and specificity, enabling effective enrichment of low-abundance m6A modified fragments.
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 method achieves specific and efficient enrichment and detection of m6A sites, reducing false positives and enabling large-scale sequencing applications.
Implementation Method 1
a thiol compound to convert m6A into hm6A, followed by reaction with MTSEA-biotin
Implementation Method 2
reaction with MTSEA-biotin to enrich and detect m6A sites
Data Source
AI summary
Provided is a chemical tagging-based method for modified nucleoside sequencing, enrichment, and measurement, comprising reacting a thiol compound with an N-hydroxymethyl chemically modified nucleoside, then using a chemical tag such as biotin to perform tagging, and then enriching and sequencing or measuring. In the method of the present invention, selective chemical tagging is used, and the selectivity of the chemical reaction ensures result specificity and reduces false positive results.