5′-End Nucleic Acid Labeling via Abasic-Site Coupling
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Solution Overview
Problem
Existing nucleic acid labeling methods are lengthy, require specialized enzymes and toxic chemicals, and have variable efficiency depending on nucleic acid length and position, necessitating a simpler, efficient, and eco-friendly alternative.
Innovation Solution
A method involving 5'-end glycosylase to create an abasic site followed by coupling with an aldehyde-reactive compound carrying a detectable label for 5'-end labeling of nucleic acids, using compounds like hydroxylamine biotin or fluorescent dyes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If chemical labeling methods are used to modify nucleic acids, then labeling can be achieved, but the procedures become lengthy and require toxic chemicals
Solution Approach 1:
The patent extracts and utilizes the aldehyde group naturally present at the 5'-end of nucleic acids (formed during synthesis or degradation) as the labeling site. By targeting this specific functional group with aldehyde-reactive compounds, the method eliminates the need for complex chemical modification procedures and toxic reagents while maintaining high labeling efficiency
Solution Approach 2:
The patent introduces aldehyde-reactive compounds as intermediaries that carry detectable labels (fluorescent dyes, biotin, etc.). These compounds specifically react with the aldehyde group at the 5'-end of nucleic acids, serving as a bridge between the nucleic acid and the detectable label, thereby simplifying the overall labeling process
2Reliability
If enzymatic labeling methods are used, then labeling can be achieved, but specialized enzymes and training are required
Solution Approach 1:
The patent exploits the inherent aldehyde group at the 5'-end of nucleic acids as a natural labeling site. This self-presenting functional group eliminates the need for external enzymes or complex activation steps, making the labeling process as simple as mixing the nucleic acid with the aldehyde-reactive compound
Solution Approach 2:
The patent replaces enzyme-based biological systems with direct chemical reactions between aldehyde-reactive compounds and the aldehyde group. This substitution eliminates the need for specialized enzymes, reduces training requirements, and simplifies waste disposal while maintaining high labeling efficiency
3Reliability
If existing labeling methods are used, then labeling can be achieved, but efficiency varies depending on nucleic acid length and position
Solution Approach 1:
The patent develops a universal labeling method that targets the aldehyde group at the 5'-end of nucleic acids. This approach works consistently across different nucleic acid lengths, structures (single-stranded or double-stranded), and types (DNA or RNA), providing uniform high efficiency regardless of the specific nucleic acid characteristics
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
Achieves efficient and straightforward 5'-end labeling of nucleic acids with high purity and specificity, reducing the need for toxic materials and specialized training.
Implementation Method 1
providing a 5'-end glycosylase to react with the target nucleic acid to create an intermediate nucleic acid having an abasic site at the 5'-end
Implementation Method 2
providing an aldehyde-reactive compound carrying a detectable label for coupling with the intermediate nucleic acid at the abasic site to form a labeled nucleic acid
Data Source
AI summary
Provided is a method for labeling a nucleic acid, including providing a target nucleic acid to be labeled; providing a 5′-end glycosylase to react with the target nucleic acid to create an intermediate nucleic acid having an abasic site at a 5′-end; and providing an aldehyde-reactive compound carrying a detectable label for coupling with the intermediate nucleic acid to form a labeled nucleic acid with the detectable label attached at 5′-end. Also provided are a kit and a system for labeling nucleic acids.