Multivalent Binding Composition for High-Contrast Nucleic Acid Analysis
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Solution Overview
Problem
Existing nucleic acid sequencing and hybridization technologies face challenges such as detection errors due to dense packing of labeled molecules, low contrast-to-noise ratio, and limited specificity and reaction rates, leading to inaccuracies in fluorescence-based genomic testing and hybridization protocols.
Innovation Solution
The use of multivalent binding compositions, comprising polymer-nucleotide conjugates with multiple copies of nucleotides attached to particles, enhances local nucleotide concentration and binding signals, improving detection accuracy and hybridization efficiency through the use of specific conditions and solvents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple labeled molecules are densely packed on substrate to increase detection throughput, then productivity increases, but measurement precision deteriorates due to detection errors and low contrast-to-noise ratio
Solution Approach 1:
The invention transitions from a two-dimensional surface packing problem to a three-dimensional solution by attaching multiple nucleotides to particles that extend into the solution phase. This vertical dimension allows multiple binding sites per particle while maintaining spatial separation, enabling high throughput without sacrificing detection precision through improved signal-to-noise ratio
Solution Approach 2:
Multiple nucleotide binding sites are combined on a single particle structure, creating a multivalent binding composition. This merging approach increases the effective concentration of nucleotides at the binding interface while maintaining detectable signal intensity, thereby improving both throughput and measurement precision simultaneously
2Ease of operation
If conventional hybridization protocols are used to maintain simplicity, then ease of operation is preserved, but reliability deteriorates due to limited specificity and reaction rates
Solution Approach 1:
The invention changes the valency parameter of the binding composition by attaching multiple nucleotides to each particle. This parameter change increases the effective concentration and on-rate of hybridization while maintaining off-rate characteristics, thereby improving reliability without complicating the operational protocol
Solution Approach 2:
The binding composition uses composite structures combining particles with multiple attached nucleotides. This composite approach enhances hybridization specificity and reaction kinetics while maintaining ease of operation, as the multivalent particles can be introduced and processed using conventional hybridization workflows
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 increases the contrast-to-noise ratio and hybridization stringency, reducing errors and enhancing the throughput and accuracy of nucleic acid analysis, particularly in sequencing and biosensor microarrays.
Implementation Method 1
a multivalent binding composition having multiple copies of a nucleotide attached to a particle which effectively increases the local concentration of the nucleotide and enhances the binding signals
Data Source
AI summary
Multivalent binding compositions including a particle-nucleotide conjugate having a plurality of copies of a nucleotide attached to the particle are described. The multivalent binding compositions allow one to localize detectable signals to active regions of biochemical interaction, e.g., sites of protein-protein interaction, protein-nucleic acid interaction, nucleic acid hybridization, or enzymatic reaction, and can be used to identify sites of base incorporation in elongating nucleic acid chains during polymerase reactions and to provide improved base discrimination for sequencing and array based applications.