Triazole Reader Molecules for Single-Molecule Recognition Tunneling
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Solution Overview
Problem
Current methods for protein analysis lack a cost-effective and high-throughput approach to identify amino acids and proteins at the single-molecule level, with existing technologies like mass spectrometry being large and expensive, and lacking a tool equivalent to PCR for protein sample amplification.
Innovation Solution
The use of triazole-based compounds as universal reader molecules in recognition tunneling systems, which are chemically tethered to electrodes to generate distinct tunneling signals for identifying DNA bases, sugars, and proteins/peptides, allowing for accurate identification and sequencing at the single-molecule level.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If mass spectrometry is used for protein identification, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent replaces the complex mechanical mass spectrometry system with a quantum tunneling-based electronic detection system. Instead of using physical mass analysis instruments, the invention uses electron tunneling current measurements through molecules positioned between electrodes, substituting mechanical/physical instrumentation with quantum mechanical measurement principles.
Solution Approach 2:
The invention extracts the core measurement function from the complex mass spectrometry system by isolating individual molecules between electrodes for direct tunneling current measurement. This extracts the essential identification capability while removing the need for large-scale instrumentation, focusing only on single-molecule detection.
2Reliability
If traditional protein analysis methods are used, then reliability is maintained, but productivity decreases
Solution Approach 1:
The patent employs self-assembled monolayers of reading molecules on electrode surfaces that automatically capture and hold target molecules through non-covalent interactions. This self-service mechanism eliminates the need for complex sample preparation and handling procedures, enabling high-throughput automated analysis while maintaining reliable identification.
Solution Approach 2:
The invention changes the measurement parameter from mass-to-charge ratio (in mass spectrometry) to tunneling current characteristics. By measuring electronic transport properties instead of physical mass, the system achieves both high reliability in identification and improved productivity through simpler, faster measurements.
3Ease of operation
If imidazole-based reading molecules are used, then basic recognition function is achieved, but measurement precision and versatility are limited
Solution Approach 1:
The patent uses composite reading molecules containing triazole rings combined with specific functional groups (carboxylic acid, amide, hydroxyl) to create molecules with enhanced recognition capabilities. This composite structure provides both the basic recognition function and improved measurement precision through multiple interaction mechanisms.
Solution Approach 2:
The invention introduces specific functional groups at particular positions on the reading molecule structure to create localized recognition sites with different binding affinities and specificities. This local quality enhancement allows discrimination between similar molecules while maintaining overall structural simplicity.
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
Triazole-based compounds improve the accuracy and efficiency of protein and DNA identification, achieving up to 95.5% accuracy in distinguishing different nucleoside monophosphates with fewer parameters, and can interact with various molecules like carbohydrates and amino acids, providing a cost-effective alternative to existing methods.
Implementation Method 1
Recognition Tunneling (RT) has emerged as such a method, which is purely physical and does not rely on the reactions of a DNA polymerase or ligase, but also is able to recognize any chemical residue provided that it generates a distinctive tunneling current signal.
Implementation Method 2
the mechanism of recognition tunneling for reading nucleic acids, sugars, and amino acid sequences is based on the trapping of an analyte (i.e., a molecule of a nucleic acid, a sugar, an amino acid) by reading molecules, which are chemically tethered to two closely spaced electrodes, which generate a distinct tunneling signal upon a potential being applied across the electrodes
Data Source
AI summary
Triazole-based molecules, methods of making and using the same are provided. Triazole-based molecules may be used as reading molecules and incorporated into or operatively-linked with electrodes, for example, and used in recognition tunneling systems to identify individual and/or sequences of molecules (e.g., DNA bases, carbohydrates, proteins, peptides, and/or amino-acids).