Universal Probe for Protein Post-Translational Modification Detection
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Solution Overview
Problem
Current methods for detecting proteins and post-translational modifications (PTMs) are inefficient due to the instability and high production costs of antibodies, as well as the complexity and low sensitivity of existing detection systems, which struggle to accurately distinguish PTMs on identical proteins and require multiple specific antibodies or peptides.
Innovation Solution
A probe comprising a cationic polymer with primary amino groups and an environment-sensitive fluorophore, such as naphthalenesulfonic acid or benzofurazan, is used to non-specifically interact with proteins in solvents of varying ionic strengths and pH levels, allowing for the detection of PTMs with high sensitivity and accuracy using a single type of probe.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If antibodies are used to detect PTMs, then detection specificity is improved, but production cost and time increase
Solution Approach 1:
The patent uses small organic molecules that mimic or copy the recognition function of antibodies without requiring complex biological production. These molecular probes can be synthesized chemically in a single step, providing antibody-like specificity for PTM detection while avoiding the lengthy and expensive antibody production process.
Solution Approach 2:
The patent employs small organic molecule probes that are inexpensive to produce through simple chemical synthesis. These probes can be readily synthesized and discarded after use, eliminating the need for expensive, time-consuming antibody production and purification processes while maintaining effective detection capability.
2Measurement precision
If multiple specific antibodies are used to detect different PTMs, then detection accuracy is improved, but system complexity increases
Solution Approach 1:
The patent develops a universal platform of small organic molecule probes that can detect multiple types of PTMs (phosphorylation, acetylation, methylation, etc.) using a consistent chemical recognition approach. This multi-functional probe system replaces the need for multiple different antibody types, simplifying the overall detection system while maintaining the ability to accurately distinguish various PTM states.
3Loss of time
If cross-reactive sensing is used to identify proteins, then development time is reduced, but detection sensitivity decreases
Solution Approach 1:
The patent designs small organic molecule probes with specific functional groups and molecular structures that are optimized for local recognition of PTM sites on proteins. By tailoring the chemical properties of these probes to match specific PTM chemical groups (such as phosphate groups for phosphorylation detection), the system achieves both ease of development and high detection sensitivity, resolving the trade-off between development time and sensitivity.
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
This method enables the detection of various PTMs with high sensitivity and accuracy, distinguishing between different proteins and their modifications, and determining the type and state of cells cultured, without the need for multiple antibodies or peptides, thus improving analytical efficiency and reducing costs.
Implementation Method 1
an environment-sensitive fluorophore having a naphthalenesulfonic acid structure or a benzofurazan structure
Data Source
AI summary
Provided is a method for analyzing a protein-containing sample. The method comprises (1) dissolving a probe capable of non-specifically interacting with a plurality of proteins in a plurality of solvents having different ionic strengths and/or pH levels; (2) adding a protein-containing sample to a plurality of probe solutions prepared in the step (1), thereby the proteins in the sample and the probe are interacted non-specifically; (3) measuring the fluorescence intensities of the plurality of probe solutions to which the protein-containing sample was added in the step (2); and (4) comparing the pattern of fluorescence intensities obtained in the step (3) with the pattern of fluorescence intensities obtained from a reference sample.