Bead Construct Fluorophore Conformational Freedom for Reagent-less Detection
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Solution Overview
Problem
Current bead microarrays require optical labeling and additional reagents, increasing complexity and time for analyte detection, as they rely on direct linkage of biomolecules to microbeads without conformational flexibility in fluorophore moieties.
Innovation Solution
A bead construct with fluorophore moieties connected by internal linkers providing conformational freedom, reduced upon target analyte binding, allowing optical signal changes without additional reagents, using a microarray with beads, linkers, and ligands to detect analytes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If direct linkage of biomolecules to microbeads is used, then manufacturing simplicity is maintained, but additional reagents and incubation steps are required increasing assay complexity
Solution Approach 1:
The patent combines the fluorophore, linker, and ligand into a single integrated bead construct. The fluorophore is directly conjugated to the bead via a linker that also carries the ligand, eliminating the need for separate labeling reagents and multiple incubation steps. This merging of components resolves the contradiction by maintaining manufacturing simplicity while reducing assay complexity.
Solution Approach 2:
The bead construct serves multiple functions simultaneously: the bead provides the structural platform, the linker provides both mechanical connection and conformational freedom, and the ligand provides target-specific binding. The fluorophore integrated into this multi-functional construct provides detection capability without requiring additional reagents, thus resolving the contradiction between manufacturing ease and assay simplicity.
2Ease of manufacture
If direct linkage of biomolecules to microbeads is used, then manufacturing process is simplified, but detection time increases due to additional incubation steps
Solution Approach 1:
The fluorophore, linker, and ligand are pre-assembled into a single conjugated construct before the assay begins. This preliminary action of combining all necessary components into one unit eliminates the need for sequential addition of reagents and multiple incubation steps during the assay, thus reducing detection time while maintaining manufacturing simplicity.
Solution Approach 2:
The bead construct enables continuous detection action by having the fluorophore ready to emit signal immediately upon target binding. The pre-conjugated design ensures that all components are in place and functional from the start of the assay, eliminating idle time between reagent additions and maintaining continuous useful action throughout the detection process.
3Measurement precision
If fluorophore moieties with conformational freedom are used, then optical signal change upon binding is enabled, but structural complexity of the bead construct increases
Solution Approach 1:
The linker is designed to be flexible and dynamic, allowing conformational freedom that enables the fluorophore to change its optical signal upon target binding. This dynamic property of the linker resolves the contradiction by providing the necessary structural flexibility for signal detection while keeping the overall construct design relatively simple through the use of a single flexible connecting element.
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 reagent-less and expedited detection of target analytes with real-time kinetic measurements, independent of initial signals or backgrounds, by altering optical signatures upon analyte binding.
Implementation Method 1
the internal linker is formed by H-bonds, salt bridges, electrostatic interaction, or at least one ionic bond
Implementation Method 2
the internal linker is formed by H-bonds, salt bridges, electrostatic interaction, or at least one ionic bond
Implementation Method 3
the internal linker is formed by H-bonds, salt bridges, electrostatic interaction, or at least one ionic bond
Implementation Method 4
an optical signal emitted by the fluorophore changes when reducing the conformational freedom of the two fluorophore moieties to each other
Data Source
Figure 1A~1C
Figure 2
Figure 3A~3E
AI summary
A microarray, comprising a plurality of bead constructs disposed thereon, wherein the bead constructs comprise: (a) a bead; (b) a fluorophore molecule, wherein the fluorophore molecule comprises at least two subunits connected to each other by at least one internal linker that provides conformational freedom to the at least two subunits, and wherein the optical signal emitted by the flurophore changes when reducing the conformational freedom of the at least two subunits to each other; (c) a first linker molecule connected to the bead and to one of the subunits of the flurophore molecule; (d) a second linker molecule connected to another subunit of the fluorophore molecule; and (e) a ligand molecule connected to the second linker.