Fluorescent BCAA Probe Fusion for Real-Time In Situ Detection
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Solution Overview
Problem
Current methods for detecting branched chain amino acids (BCAAs) are time-consuming, require complex sample processing, and are not suitable for high-throughput, real-time, or in situ analysis with high spatial-temporal resolution.
Innovation Solution
A fluorescent sensor is developed by fusing a leucine responsive polypeptide with an optically active polypeptide, such as a fluorescent protein, which can be genetically introduced into cells to visualize BCAA or leucine binding, allowing real-time localization and quantitative detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional detection methods (mass spectrometry, chromatography, capillary electrophoresis) are used, then detection accuracy can be achieved, but sample processing is time-consuming and complex
Solution Approach 1:
The invention extracts and isolates the key detection function by using a fluorescent sensor that directly binds to BCAAs, eliminating the need for complex sample processing steps such as cell fragmentation, separation, extraction, and purification required by traditional methods. The sensor enables direct detection in situ without time-consuming preparation
Solution Approach 2:
The fluorescent sensor acts as an intermediary between the BCAA analyte and the detection system. The sensor comprises a BCAA-responsive element that specifically binds BCAAs and a fluorescent reporter that converts the binding event into a measurable fluorescence signal, simplifying the detection pathway while maintaining accuracy
2Measurement precision
If traditional detection methods are used, then quantitative analysis can be performed, but high-throughput and real-time detection are not achievable
Solution Approach 1:
The fluorescent sensor performs self-detection by autonomously binding to BCAAs and generating a fluorescence signal without requiring external processing steps. This self-service capability enables each sensor molecule to independently perform detection, allowing parallel measurement across many samples simultaneously for high-throughput analysis
Solution Approach 2:
The invention replaces mechanical separation and processing systems (chromatography columns, electrophoresis apparatus) with a biochemical sensing system based on fluorescent binding. This substitution enables real-time detection without mechanical manipulation, dramatically increasing productivity while maintaining quantitative accuracy
3Measurement precision
If traditional detection methods are used, then BCAA content can be measured, but in situ detection with high spatial-temporal resolution is not possible
Solution Approach 1:
The fluorescent sensor can be nested within cellular structures or targeted to specific subcellular compartments, enabling detection of BCAAs in situ at their site of action. The sensor's compact fluorescent probe structure allows it to function within the confined spaces of cells while providing high spatial resolution
Solution Approach 2:
The fluorescent sensor is designed to bind BCAAs with high affinity and rapidly equilibrate, providing preliminary detection capability before significant metabolic changes occur. This allows real-time monitoring of BCAA dynamics with high temporal resolution, capturing transient metabolic events
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 fluorescent sensor enables easy, high-throughput, and quantitative detection of BCAAs with large fluorescence dynamic changes, eliminating time-consuming sample processing steps and enabling subcellular localization and high-throughput screening.
Implementation Method 1
an optically active polypeptide, wherein the optically active polypeptide is inserted into the leucine responsive polypeptide
Data Source
AI summary
Provided herein is a fluorescent sensor, comprising a) a responsive polypeptide, and b) an optically active polypeptide, wherein the optically active polypeptide is inserted into the responsive polypeptide. Also provided herein are nucleic acid sequences encoding the fluorescent sensor, expression vectors comprising the nucleic acid sequence, and cells comprising such expression vectors. Also provided herein are methods for preparing the fluorescent sensor, uses of the fluorescent sensor, and kits comprising the fluorescent sensor.