Asymmetric Adapter Library Construction for Nucleic Acid Tagging
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Solution Overview
Problem
Current nucleic acid analysis methods require complex and inefficient processes for asymmetrically labeling nucleic acids, which complicates subsequent manipulations and reactions, particularly in comparative genomics and other nucleic acid-based assays.
Innovation Solution
The use of asymmetric adapters that include complementary domains, regions of non-complementarity, and hairpin structures to facilitate self-priming and nucleic acid synthesis, allowing for the production of asymmetrically tagged nucleic acid fragments through ligation and subsequent nucleotide polymerase reactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional methods (Dam methylase or biotin labeling) are used for asymmetric tagging, then asymmetric labeling can be achieved, but the process becomes complex and inefficient
Solution Approach 1:
The adapter is divided into distinct functional segments: a first strand with a ligation site for asymmetric tagging, a second strand with a hairpin structure for self-priming, and a region of non-complementarity between them. This segmentation allows each component to perform its specific function independently, simplifying the overall process while maintaining reliable asymmetric labeling.
Solution Approach 2:
The adapter acts as an intermediary molecule that mediates between the nucleic acid fragment and the labeling system. By incorporating both ligation sites and self-priming hairpins in a single adapter molecule, it simplifies the tagging process and reduces the number of separate reagents and steps required.
2Reliability
If complex asymmetric labeling processes are used, then asymmetric tagging can be achieved, but subsequent manipulations and reactions become more difficult
Solution Approach 1:
The hairpin structure and self-priming capability are extracted from the adapter design, allowing the nucleic acid synthesis to proceed automatically without requiring additional priming steps. This extraction of the self-priming function simplifies subsequent manipulations by eliminating the need for separate priming operations.
Solution Approach 2:
The adapter is pre-configured with the hairpin structure that forms the self-priming site during the ligation step. This preliminary preparation of the priming site eliminates the need for separate priming steps in subsequent operations, making manipulation easier and more efficient.
3Reliability
If traditional asymmetric labeling methods are used, then nucleic acid analysis can be performed, but the efficiency is reduced
Solution Approach 1:
The adapter merges multiple functions into a single molecule: asymmetric tagging capability through the ligation site, self-priming capability through the hairpin structure, and template provision for nucleic acid synthesis. This merging eliminates multiple separate steps and reagents, significantly improving analysis efficiency while maintaining reliability.
Solution Approach 2:
The hairpin structure within the adapter provides self-priming capability, allowing the nucleic acid synthesis to initiate automatically without requiring external primers. This self-service mechanism streamlines the process and improves efficiency by eliminating the need for separate priming steps.
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 method simplifies the process of asymmetric labeling, enabling efficient manipulation and analysis of nucleic acids by creating distinct tags on each end of the fragments, thereby enhancing the control over subsequent reactions and reducing the complexity of nucleic acid manipulation.
Implementation Method 1
a first and a second nucleic acid strand associated with each other via one or more complementary domains
Implementation Method 2
performing a first round of nucleic acid synthesis initiated from the self-priming site
Implementation Method 3
a ligation site positioned on the first end of the adapter configured to allow ligation of the adapter to the double stranded nucleic acid fragment
Data Source
AI summary
The present invention provides methods and compositions for asymmetrically tagging a nucleic acid fragment using asymmetric adapters.