L-2-Hydroxyglutarate Biosensor Using LhgR-FRET Signal Conversion
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Solution Overview
Problem
Current methods for detecting intracellular L-2-hydroxyglutarate (L-2-HG) are time-consuming and lack spatial and temporal resolution, hindering real-time monitoring and diagnostic techniques.
Innovation Solution
Development of an L-2-hydroxyglutarate biosensor based on a specific transcriptional regulator, LhgR, coupled with Forster Resonance Energy Transfer (FRET) technology, which utilizes a fusion protein of cyan fluorescent protein mTFP and yellow fluorescent protein Venus to detect L-2-HG concentration through conformational changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional methods (LC-MS/MS, GC-MS/MS) are used to detect L-2-HG, then measurement precision is achieved, but detection speed and productivity deteriorate due to time-consuming procedures
Solution Approach 1:
The patent replaces complex mechanical/chemical separation systems (LC-MS/MS, GC-MS/MS) with a biological sensing system based on FRET. The biosensor uses fluorescent protein conformational changes upon L-2-HG binding to directly generate optical signals, eliminating the need for chromatographic separation and mass spectrometry analysis, thus achieving rapid detection without sacrificing precision
Solution Approach 2:
The patent introduces a transcriptional regulator as an intermediary element that specifically binds to L-2-HG and triggers conformational changes in the fluorescent protein. This intermediary translates the chemical binding event into an optical signal, enabling direct fluorescence-based detection that is both rapid and precise
2Measurement precision
If conventional methods are used, then comprehensive metabolic analysis is possible, but spatial and temporal resolution deteriorate, preventing real-time monitoring
Solution Approach 1:
The patent replaces batch processing analytical methods with a real-time optical sensing system. The FRET-based biosensor continuously monitors L-2-HG levels through fluorescence intensity changes, providing temporal resolution that enables dynamic metabolic analysis rather than static snapshots
Solution Approach 2:
The patent utilizes fluorescence intensity changes (optical property changes) as the biosensor responds to L-2-HG binding. The conformational changes in the fluorescent protein alter emission properties, providing real-time visualizable data on metabolic dynamics
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 biosensor enables rapid, sensitive, and accurate detection of L-2-HG concentrations in various biological samples and real-time monitoring of intracellular dynamics, providing results consistent with conventional methods like LC-MS/MS.
Implementation Method 1
coupled with Forster Resonance Energy Transfer (FRET) technology, which utilizes a fusion protein of cyan fluorescent protein mTFP and yellow fluorescent protein Venus to detect L-2-HG concentration through conformational changes
Implementation Method 2
a fusion protein of cyan fluorescent protein mTFP and yellow fluorescent protein Venus to detect L-2-HG concentration through conformational changes
Data Source
AI summary
A transcriptional regulator LhgR is specifically responsive to L-2-hydroxyglutarate (L-2-HG) and an L-2-HG biosensor based on this transcriptional regulator; wherein the biosensor is a fusion protein of cyan fluorescent protein mTFP, L-2-HG specific transcriptional regulator LhgR, and yellow fluorescent protein Venus, including three types of L-2-HG biosensor LHGFR0N0C, LHGFR0N3C, and LHGFR0N7C. The application of the L-2-HG biosensor in the detection of L-2-HG-containing biological samples, real-time detection of intracellular L-2-HG concentration in bacteria and in human cells. The experiments confirmed that the biosensor can achieve high specificity, sensitivity, and accuracy in the detection of L-2-HG and can determine intracellular L-2-HG dynamics in real time, which has good application prospects.