Biuret-Fe-TAML Probe for Visual Protein Detection
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Solution Overview
Problem
Current protein detection methods, such as ELISA and western blot assays, face limitations including high costs, complex storage and handling of antibodies/enzymes, and the need for expensive instrumentation, especially for detecting low concentrations of proteins, which hinders early disease diagnosis and requires sophisticated equipment for visualization.
Innovation Solution
A small molecule peroxidase mimic, biuret-Fe-TAML complex, is used as a catalytic probe for in-gel visual and quantitative detection of proteins, employing catalytic signal amplification to lower detection limits and eliminate the need for expensive gel doc systems, allowing for visual detection across a wide range of analyte concentrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If ELISA or western blot assays are used for protein detection, then detection sensitivity is improved, but cost and device complexity increase due to expensive antibodies, enzymes, and instrumentation
Solution Approach 1:
The invention extracts and replaces the expensive antibody-enzyme components with a simplified small-molecule probe system. The probe directly binds to the target protein and generates a detectable signal without requiring secondary antibodies or enzyme conjugates, thereby eliminating the need for complex reagent storage and handling while maintaining detection sensitivity
Solution Approach 2:
The invention uses a small-molecule probe that copies the binding function of antibodies but without their complexity. The probe contains a recognition element that specifically binds to the target protein and a reporter group that provides the detection signal, creating a simplified version of the antibody-enzyme system that achieves similar detection capability with reduced cost and complexity
2Speed
If fluorescent reporter molecules are used for direct protein detection, then detection speed is improved, but detection limit increases due to insufficient signal amplification
Solution Approach 1:
The invention changes the key parameter of signal amplification by incorporating catalytic elements into the probe system. The catalytic component enables a single probe molecule to generate multiple signal molecules through catalytic turnover, significantly amplifying the detection signal while maintaining the speed advantage of direct detection methods
Solution Approach 2:
The probe is designed as a composite structure combining a recognition element for specific protein binding with a catalytic component for signal amplification. This composite design integrates both the specificity of antibody-based methods and the signal amplification capability of enzymatic systems into a single molecule, achieving low detection limits without sacrificing detection speed
3Measurement precision
If catalytic signal amplification is implemented using HRP, then detection limit is improved, but storage and handling complexity increases due to enzyme stability requirements
Solution Approach 1:
The invention replaces the expensive, stability-sensitive HRP enzyme with a small-molecule probe that does not require the same level of stability control. The probe can be stored and handled under simpler conditions, eliminating the need for specialized enzyme storage while maintaining catalytic signal amplification capability
Solution Approach 2:
The invention substitutes the biological enzyme system (HRP) with a synthetic small-molecule probe system that performs similar catalytic functions. This substitution replaces the complex biological machinery of enzyme storage and handling with a simpler chemical system that is more stable and easier to manage, while preserving the signal amplification mechanism
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 biuret-Fe-TAML complex enables efficient, one-step detection of bioanalytes with low detection limits, facilitating visual detection without the need for expensive instrumentation, thereby improving the detection of proteins and reducing costs and complexity in protein analysis.
Implementation Method 1
employing catalytic signal amplification to lower detection limits
Implementation Method 2
horseradish peroxidase mimic FeIII-TAML complex of ligand as a catalytic probe
Data Source
AI summary
The present invention relates to a method for in-gel visual detection and quantitative detection of proteins in activity based protein profiling (ABPP) using horseradish peroxidase mimic FeIII-TAML complex of ligand as a catalytic probe. The invention further relates to kit comprising compounds of formula (I) and method for the detection of bioanalytes using kit comprising compounds of formula (I).