Single-Cell PTA Amplification With Terminator-Controlled Sequencing
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Solution Overview
Problem
Existing methods for nucleic acid amplification and sequencing are limited by the inability to effectively address the need for high-throughput analysis of specific nucleic acids, such as nucleic acid sequencing, which is not a problem. In some cases, these samples are obtained in small quantities from single cells. There is a need for highly accurate, scalable, and efficient nucleic acid amplification and sequencing methods for high-throughput analysis, which is not a problem. In some cases, these samples are obtained in small quantities from single cells. There is a need for highly accurate, scalable, and efficient nucleic acid sequencing methods for high-throughput analysis, which would overcome limitations in the current methods by increasing sequence representation, uniformity and accuracy in a reproducible manner.
Innovation Solution
The method involves contacting a single cell with a lysis buffer containing amplification primers, neutralization buffer, and nucleic acid polymerase, and a mixture of nucleotides with terminator nucleotides to generate terminated amplification products through strand displacement replication, using buffers with specific compositions and conditions to enhance accuracy and scalability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional nucleic acid amplification methods are used, then amplification can be achieved, but sequence representation, uniformity and accuracy are insufficient for high-throughput analysis
Solution Approach 1:
The amplification process is divided into distinct phases: lysis buffer treatment, neutralization buffer addition, polymerase activation, and terminator nucleotide incorporation. This segmentation allows each phase to be optimized independently, improving both accuracy and throughput by preventing interference between steps.
Solution Approach 2:
The patent employs specific parameter changes including pH adjustment through neutralization buffer, temperature control for polymerase activation, and precise concentration control of terminator nucleotides (0.01-0.5 mM). These parameter optimizations enable high-throughput analysis while maintaining sequence representation and accuracy.
2Productivity
If single cell samples are processed, then high-throughput analysis is enabled, but sample quantity is limited and amplification accuracy becomes challenging
Solution Approach 1:
The lysis buffer is prepared in advance with specific components (EDTA, DTT, SDS, Tris) at optimized concentrations to ensure complete and uniform cell lysis before amplification begins. This preliminary action guarantees that single cell samples are fully prepared for accurate amplification, maintaining both high-throughput capability and precision.
Solution Approach 2:
The neutralization buffer acts as an intermediary between the lysis buffer and the amplification reaction. It neutralizes the alkaline lysis buffer, allowing the polymerase to become active without interference. This intermediary step ensures accurate amplification from single cell samples while enabling high-throughput processing.
3Manufacturing precision
If terminator nucleotides are used to control replication, then amplification products can be generated with specific properties, but replication must be precisely controlled
Solution Approach 1:
The terminator nucleotides automatically terminate replication at specific positions without requiring external control mechanisms. The polymerase naturally incorporates the terminator nucleotide when the template strand is exhausted or the stop signal is encountered. This self-service mechanism simplifies the system while maintaining precise control over amplification product properties.
Solution Approach 2:
The concentration of terminator nucleotides is precisely controlled (0.01-0.5 mM) to regulate replication termination. By adjusting this parameter, the patent controls the extent and specificity of amplification, achieving desired product properties without complex control mechanisms.
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 accurate and scalable nucleic acid amplification and sequencing, improving sequence representation, uniformity, and reducing processing times, with high-throughput analysis of single cells, including proteins, DNA, and RNA, and post-transcriptional modifications.
Implementation Method 1
the replication proceeds by strand displacement replication
Implementation Method 2
at least one terminator nucleotide which terminates nucleic acid replication by the polymerase
Implementation Method 3
contacting a single cell with lysis buffer
Implementation Method 4
adding at the same time to the lysis buffer: a neutralization buffer
Data Source
AI summary
Provided herein are compositions and methods for high-throughput Primary Template-Directed Amplification (PTA) nucleic acid amplification and sequencing methods, and their applications for mutational analysis in research, diagnostics, and treatment. Further provided herein are methods for parallel analysis of DNA, RNA, and/or proteins from single cells.