Activity-Based Probe for Xenobiotic Enzyme Characterization
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Solution Overview
Problem
Current techniques for characterizing microbial communities and enzymes involved in xenobiotic metabolism fail to accurately determine functional activity, as they rely on gene or amino acid presence rather than actual enzyme function, leading to incomplete understanding and identification of analyte species in biological environments.
Innovation Solution
Development of activity-based probes that bind to enzymes involved in xenobiotic metabolism, allowing for real-time detection and measurement of enzyme activity through fluorescent, colorimetric, or mass spectrometry techniques, enabling the identification and quantification of functionally active enzymes in biological samples.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If current techniques using fluorescence in situ hybridization (FISH) or gene-based labeling are used to sort microbes from microbiomes, then gene or amino acid presence can be detected, but functional activity of enzymes cannot be accurately determined
Solution Approach 1:
The patent uses activity-based probes as intermediary molecules that specifically bind to active enzymes through covalent bonding. These probes serve as mediators between the enzyme's catalytic activity and the detection system, allowing functional activity to be directly visualized and measured rather than inferring function from gene presence alone
Solution Approach 2:
The patent employs fluorescently labeled probes that emit detectable signals when bound to active enzymes. The color/fluorescence changes provide direct visual indication of enzyme activity, enabling precise measurement of functional activity and accurate identification of metabolically active microbial populations
2Reliability
If gene or transcript presence is used to identify enzymes involved in xenobiotic metabolism, then genetic information can be obtained, but actual enzyme function and activity levels remain unknown
Solution Approach 1:
The patent replaces complex genetic analysis systems (sequencing, transcriptome analysis) with a simpler biochemical detection system using activity-based probes. This substitution directly measures enzyme activity through probe binding and detection, providing reliable functional characterization without the complexity of genomic approaches
Solution Approach 2:
The patent changes the detection parameter from genetic presence (DNA/RNA sequences) to functional activity (enzyme catalysis). By using probes that detect actual enzymatic reactions rather than genetic material, the method provides reliable functional characterization of xenobiotic metabolism enzymes
3Productivity
If conventional sorting and identification methods are used for microbial communities, then community composition can be analyzed, but real-time enzyme activity measurement is not possible
Solution Approach 1:
The patent enables continuous real-time monitoring of enzyme activity through the use of fluorescently labeled probes that remain bound to active enzymes. This allows continuous observation of metabolic activity in microbial communities without interruption or sample processing delays, providing uninterrupted functional analysis
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
Enables precise identification and quantification of active enzymes, providing a functional understanding of xenobiotic metabolism at various levels, including community, taxa, and enzyme levels, overcoming the limitations of existing methods by directly measuring enzyme activity rather than relying on gene or transcript presence.
Implementation Method 1
the probe to bind to an enzyme involved in xenobiotic metabolism such that a probe-enzyme conjugate is formed
Implementation Method 2
analyzing the probe-enzyme conjugate using a fluorescent detection technique
Data Source
AI summary
Activity-based probes that can be used to selectively identify and characterize enzymes that are involved in different phases of xenobiotic metabolism in a host and its microbiota population(s) are described. The activity-based probes described specifically label only their target active enzymes involved in xenobiotic metabolism and therefore provide a measurement of true protein functional activity rather than transcript or protein abundance. The activity-based probes also provide multimodal profiling of these active enzymes. Methods for preparing the activity based probes and exemplary methods for their use also are disclosed.