Monovalent Cations Modulate Pulse Width in Sequencing
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Solution Overview
Problem
Current genetic sequencing methods are time-consuming and costly, with challenges in accuracy due to rapid nucleotide incorporation events that can result in missed pulses, leading to errors in determining nucleic acid sequences.
Innovation Solution
Incorporating monovalent cations such as alkali metals (Li+, Na+, K+, Rb+, and Cs+) at specific concentrations into the sequencing reaction to modulate the pulse width, thereby improving sequencing accuracy by extending the time nucleotides are associated with the polymerase enzyme, reducing missed incorporation events, and maintaining other sequencing parameters like interpulse distance and read length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If nucleotide incorporation is performed rapidly to increase sequencing throughput, then productivity is improved, but measurement precision deteriorates due to missed pulses
Solution Approach 1:
The patent applies dynamics by making the pulse width adjustable through monovalent cation concentration. The pulse width is not fixed but can be dynamically tuned to optimize both detection accuracy and sequencing throughput, resolving the contradiction between speed and precision.
Solution Approach 2:
The patent changes the parameter of pulse width by adjusting monovalent cation concentration. This parameter change allows the system to achieve both high throughput and high accuracy by optimizing the temporal characteristics of the incorporation signal without sacrificing either productivity or measurement precision.
2Measurement precision
If pulse width is increased to improve pulse detection accuracy, then measurement precision is improved, but duration of action increases which may reduce sequencing speed
Solution Approach 1:
The patent uses parameter changes to adjust pulse width through monovalent cation concentration. This allows optimization of pulse detection accuracy while managing the duration of action, as the cation concentration can be tuned to achieve the desired balance between pulse width and sequencing speed.
Solution Approach 2:
The patent makes pulse width dynamic and adjustable rather than fixed. By controlling monovalent cation concentration, the system can adapt pulse width to optimal values for different sequencing conditions, resolving the contradiction between detection accuracy and sequencing speed.
3Measurement precision
If monovalent cation concentration is increased to extend nucleotide association time, then measurement precision is improved, but composition complexity increases
Solution Approach 1:
The patent changes a single parameter (monovalent cation concentration) to achieve improved measurement precision. This is a simple parameter adjustment rather than adding complex components, thus improving detection accuracy without significantly increasing composition complexity.
Solution Approach 2:
The patent uses monovalent cations as intermediaries to modulate the interaction between nucleotides and polymerase. These cations serve as simple mediators that extend nucleotide association time and improve detection accuracy without adding complex structural elements to the reaction system.
Data Source
AI summary
Compositions, kits, methods and systems for single molecule nucleotide sequencing comprising producing polymerase reactions having monovalent cations that control the median pulse width for incorporated nucleotides are disclosed. The levels of monovalent cations are used to control pulse width while allowing other sequencing parameters to remain within a desirable range.