Capture Primer Segmentation for Targeted Sequencing
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Solution Overview
Problem
Current next-generation sequencing methods cannot perform targeted sequencing of specific polynucleotides, limiting their ability to capture and amplify partial genomes efficiently, which is necessary for applications like disease diagnostics and rare genetic mutation detection.
Innovation Solution
The method involves modifying immobilized capture primers by incorporating both application-specific and universal capture regions, allowing for the targeted capture and amplification of specific polynucleotides through hybridization and subsequent removal of unhybridized regions using nucleases like exonuclease, enabling efficient bridge amplification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If universal capture primers are used for sequencing, then the ability to sequence entire genomes is achieved, but the ability to perform targeted sequencing of specific polynucleotides is lost
Solution Approach 1:
The capture primer is divided into two functional segments: a universal capture region (5' end) that enables binding to the solid support and a application-specific capture region (3' end) that enables targeted polynucleotide capture. This segmentation allows the primer to perform both universal and targeted sequencing functions simultaneously.
Solution Approach 2:
The capture primer is designed with multi-functionality by incorporating both universal and application-specific capture regions. The universal region allows the primer to function in standard next-generation sequencing protocols, while the application-specific region enables targeted sequencing of particular polynucleotides, thereby achieving both universal and targeted sequencing capabilities with a single primer design.
2Measurement precision
If application-specific capture primers are used for targeted capture, then the ability to sequence specific polynucleotides is improved, but the ability to perform bridge amplification is compromised
Solution Approach 1:
The capture primer is segmented into a universal capture region at the 5' end that maintains compatibility with bridge amplification protocols and an application-specific capture region at the 3' end that enables precise target polynucleotide capture. This segmentation ensures that the universal region can reliably support bridge amplification while the application-specific region provides precise targeting.
Solution Approach 2:
Different regions of the capture primer are assigned different functional qualities: the universal capture region (5' end) is optimized for bridge amplification reliability, while the application-specific capture region (3' end) is optimized for target polynucleotide capture precision. This local differentiation of functional qualities allows both objectives to be achieved simultaneously without compromise.
3Stability of the object's composition
If unhybridized application-specific capture regions are retained, then the capture primer remains stable, but the data quality and quantity in sequencing are reduced
Solution Approach 1:
The application-specific capture region is extracted or removed from unhybridized capture primers after the hybridization step. This extraction ensures that only capture primers that have successfully bound to the target polynucleotide retain their application-specific region, while unhybridized primers have their application-specific region removed. This prevents erroneous data from unhybridized primers from compromising sequencing data quality.
Solution Approach 2:
The potential harm of retaining unhybridized application-specific capture regions (which could lead to false positives or reduced data quality) is converted into a benefit by using nuclease treatment to selectively remove these regions. This conversion ensures that only successfully hybridized capture primers contribute to sequencing data, thereby improving overall data quality and quantity.
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 data quality and quantity in next-generation sequencing, facilitating the detection of rare genetic mutations and improving the efficiency of disease diagnostics by allowing for targeted sequencing of specific genomic regions.
Implementation Method 1
contacting an application-specific polynucleotide with the application-specific capture primer under conditions sufficient for hybridization to produce an immobilized application-specific polynucleotide
Implementation Method 2
contacting the application-specific capture primer with a nuclease, wherein the application-specific capture region of an application specific capture primer not hybridized with an application-specific polynucleotide to is removed by the nuclease
Data Source
AI summary
The present disclosure relates to the field of molecular biology and more specifically to methods for capturing and amplifying target polynucleotides on a solid surface.