Nucleotide Analogs with Polymerase Interacting Components for DNA Sequencing
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Solution Overview
Problem
Current genetic analysis techniques, such as nucleic acid sequencing, face limitations in reaction kinetics, substrate specificity, and fidelity, particularly in real-time monitoring and sequencing applications, where the interaction between nucleic acid polymerases and nucleotides is not optimized for efficient and accurate nucleotide incorporation.
Innovation Solution
Development of nucleotide analogs with a polymerase interacting component that enhances the interaction between nucleic acid polymerases and nucleotides, allowing for improved reaction kinetics, substrate specificity, and fidelity by positioning the interacting component proximal to the polymerase enzyme's active site, enabling better detection and identification of incorporated nucleotides during primer extension reactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional nucleotides are used in polymerase-mediated primer extension reactions, then the basic sequencing function is achieved, but the reaction kinetics are slow and substrate specificity is limited
Solution Approach 1:
The nucleotide analog is divided into distinct functional segments: a nucleotide portion for base pairing, a polymerase interacting component for enhanced enzyme binding, a linking component connecting the segments, and a labeling portion for detection. This segmentation allows each component to be optimized independently for its specific function, improving overall reaction kinetics without compromising the basic nucleotide function.
Solution Approach 2:
The polymerase interacting component is positioned specifically within the linking component at a location that places it in interactive proximity to amino acid residues near the polymerase catalytic center. This localized enhancement of interaction quality at the critical binding interface improves substrate specificity and reaction kinetics without requiring modification of the entire nucleotide structure.
2Reliability
If conventional nucleotides are used, then the sequencing process is simple, but the fidelity of nucleotide incorporation is insufficient
Solution Approach 1:
The polymerase interacting component acts as an intermediary element that mediates the interaction between the nucleotide analog and the polymerase enzyme. By providing a dedicated interface for enzyme binding, it enhances the specificity and fidelity of nucleotide incorporation while allowing the nucleotide portion to maintain its natural base-pairing properties.
Solution Approach 2:
The polymerase interacting component is designed in advance to pre-position the nucleotide analog in optimal orientation and proximity to the polymerase catalytic center. This preliminary positioning action ensures high-fidelity incorporation by pre-establishing correct geometric and chemical interactions before the actual bond formation occurs.
3Measurement precision
If real-time monitoring of nucleic acid synthesis is implemented, then sequencing capability is improved, but the interaction time between nucleotide and polymerase is insufficient
Solution Approach 1:
The nucleotide analog performs multiple functions simultaneously: it serves as a substrate for polymerase incorporation, provides enhanced binding through the polymerase interacting component, and enables real-time detection through the labeling portion. The enhanced interaction mediated by the polymerase interacting component extends residence time without compromising the real-time monitoring capability, as the label remains detectable throughout the extended interaction period.
Data Source
AI summary
Engineered nucleotide compositions, having polymerase interacting components that improve the interactivity of the polymerase and the nucleotide, particularly for nucleic acid sequencing applications. Compositions include the interactive polymerases along with the nucleotide analogs. Kits, methods and systems are provided for analysis of nucleic acid synthesis reactions.