Monoazo Dye Quenchers Broaden Nucleic Acid Detection Range
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Solution Overview
Problem
Current nucleic acid detection and quantification methods rely on fluorescent quenchers with limited wavelength range, which restricts their ability to effectively suppress fluorescence emission across a broader spectrum, affecting sensitivity and specificity in nucleic acid assays.
Innovation Solution
Development of monoazo dyes with cyclic amine groups that serve as efficient non-fluorescent quenchers, capable of suppressing fluorescence emission over a wider wavelength range from 500 nm to 700 nm, enhancing the sensitivity and specificity of nucleic acid detection and quantification assays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional fluorescent quenchers are used in nucleic acid detection assays, then the assay can detect nucleic acids, but the fluorescence quenching is limited to a narrow wavelength range, reducing sensitivity and specificity
Solution Approach 1:
The patent changes the chemical structure parameters of the quencher molecule by incorporating a cyanine dye core with specific heterocyclic rings and substituents. This structural parameter change extends the absorption spectrum of the quencher from conventional narrow ranges to 500-700 nm, enabling it to quench fluorescence across a broader wavelength range and thereby improve detection sensitivity and specificity.
Solution Approach 2:
The patent creates a composite molecular structure by combining a cyanine dye core with specific heterocyclic ring systems and substituent groups. This composite structure integrates multiple functional components within a single quencher molecule, achieving both broad wavelength coverage (500-700 nm) and high quenching efficiency, which resolves the limitation of conventional quenchers with narrow wavelength ranges.
2Measurement precision
If the wavelength range of fluorescence quenching is expanded to improve sensitivity, then detection performance improves, but the molecular structure becomes more complex
Solution Approach 1:
The cyanine dye-based quencher structure serves multiple functions simultaneously: it provides broad wavelength absorption (500-700 nm), maintains high quenching efficiency, and offers chemical stability. The modular design with heterocyclic rings and substituents allows the single molecular framework to achieve extended wavelength range without proportionally increasing complexity, as the core structure handles multiple quenching functions across different wavelengths.
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 monoazo dyes provide improved sensitivity and specificity in detecting and quantifying nucleic acids by effectively quenching fluorescence across a broader wavelength range, enhancing the performance of nucleic acid assays, including real-time PCR and flow cytometry applications.
Implementation Method 1
In the absence of complementary targets, the primers adopt stem-loop structures through intramolecular hybridization that bring a fluorescence resonance energy transfer (FRET) quencher into proximity with an energy donor, thereby preventing fluorescence.
Implementation Method 2
one probe comprises an energy donor and the other probe comprises an energy acceptor. Thus, when the target sequence is present, the two probes can bind to adjacent sequences and energy transfer will take place.
Data Source
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AI summary
The present disclosure provides reactive quencher dyes that can be used in the detection and/or quantification of desirable target molecules, such as proteins, nucleic acids and various cellular organelles. These dyes are essentially non-fluorescent but are efficient quenchers of various fluorescent dyes. Also, provided are methods of using the dyes, bio-probes incorporating dyes and methods of using the bio-probes. The quencher dyes described herein are modified to provide beneficial properties.