Dye-Labeled Nucleotide Amplitude Detection
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Solution Overview
Problem
Current fluorescence-based detection methods in molecular biology often rely on color differentiation of fluorescent labels, which can be limiting for distinguishing between different analytes, and there is a need for modular compounds that can produce multi-amplitude labels for more flexible and sensitive detection.
Innovation Solution
Development of sets of dye-labeled nucleotide analogs with varying numbers of dye moieties attached to tetravalent biotin-binding proteins, allowing for differentiation based on the amplitude of fluorescent signals rather than color, including specific arrangements and linkages of proteins and dye components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If color-based fluorescent labels are used to differentiate analytes, then detection capability is provided, but the number of distinguishable analytes is limited by the available fluorescent colors
Solution Approach 1:
The patent changes the detection parameter from wavelength (color) to amplitude (intensity). By varying the number of fluorescent dye molecules attached to each probe, the system can differentiate multiple analytes using a single fluorescent color, thus increasing adaptability without requiring multiple detection channels
Solution Approach 2:
A single fluorescent probe design can serve multiple functions by simply varying the number of dye molecules attached. The same probe structure with different dye stoichiometries (1, 2, 3, or more dyes per probe) can detect different analytes, making the detection system universal and highly versatile
2Adaptability or versatility
If multiple different fluorescent labels are used to increase detection capability, then more analytes can be distinguished, but the complexity of the detection system increases
Solution Approach 1:
The invention changes the differentiation parameter from color (wavelength) to amplitude (intensity). By controlling the number of fluorescent dye molecules per probe, the system achieves high detection flexibility using only one fluorescent color, thereby reducing label variety complexity while maintaining high adaptability
Solution Approach 2:
The fluorescent signal is segmented into discrete amplitude levels corresponding to different numbers of dye molecules (1, 2, 3, or more). This segmentation allows clear differentiation of multiple analytes through distinct signal intensities rather than requiring multiple colors, simplifying the overall label system
3Measurement precision
If single molecule detection is performed using low fluorophore concentrations, then sensitivity is improved, but the observation volume must be extremely small
Solution Approach 1:
The probe is constructed as a composite structure with a protein core and multiple fluorescent dye molecules attached. This composite design concentrates multiple fluorophores in a single molecular entity, producing a strongly amplified signal that enables sensitive detection without requiring extremely small observation volumes
Solution Approach 2:
Multiple fluorescent dye molecules are merged into a single probe complex attached to one analyte. This merging creates a unified detection unit with cumulative fluorescence intensity, achieving high sensitivity while maintaining practical observation volumes suitable for standard detection equipment
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
Enables sensitive and flexible detection of molecules by producing distinct fluorescent signals based on the number of dye moieties, enhancing the ability to differentiate between different nucleic acids or reagents in molecular assays.
Implementation Method 1
Fluorescence is a primary detection means in numerous areas of molecular biology. Fluorescence is typically a detection means of choice because it is highly sensitive and permits detection of molecules, including single molecules
Data Source
AI summary
Sets of compounds bearing detectably different groups of labels are provided. Typically, different compounds bear different numbers of a single type of label and are thus distinguishable by the amplitude of signal produced by the label. The compounds are assembled from label components and protein cores to facilitate modular production of the compounds. In compounds containing two or more proteins, the proteins are typically covalently linked. Useful sets of compounds include sets of labeled nucleotide analogs, particularly dye-label nucleotide analogs that include tetravalent biotin-binding protein cores.