Biosensor Metabolite Monitoring via Conformational Switching
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Solution Overview
Problem
Current methods for identifying optimized bacterial strains for metabolite production are inefficient, as they often require screening through millions of strains and suffer from catabolite repression and weak induction, limiting the scalability and effectiveness of chemical production.
Innovation Solution
Genetically modifying microorganisms to include a sensor molecule that undergoes a conformation change upon binding a desired chemical, triggering a change in gene regulation and producing a detectable reporter molecule, allowing for real-time monitoring of metabolite production and selection of strains with optimal production capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional screening methods are used to identify optimized bacterial strains, then strain optimization can be achieved, but the process requires screening through millions of strains and is highly time-consuming
Solution Approach 1:
The patent introduces a biosensor as an intermediary system that includes a metabolite-binding protein coupled to a transcriptional regulator. This biosensor mediates the detection of metabolite production by converting metabolic activity into a measurable fluorescent signal, eliminating the need to screen through millions of individual strains manually.
Solution Approach 2:
The patent replaces the mechanical/manual screening process with an optical detection system. The biosensor system uses fluorescent proteins and transcriptional regulation to automatically indicate metabolite production levels, substituting the labor-intensive mechanical screening with an automated optical measurement system.
2Adaptability or versatility
If conventional inducible systems (LacI, TetR, AraC, LuxR) are used, then gene expression control is achieved, but they suffer from catabolite repression and weak induction
Solution Approach 1:
The patent changes the biochemical parameters of the inducible system by using alternative transcriptional regulators (CymR, PrpR, RhaS, XylS) with different induction mechanisms and sensitivities. This allows the system to achieve stronger induction and avoid catabolite repression that plagues the canonical systems.
Solution Approach 2:
The patent creates a composite biosensor system by combining metabolite-binding proteins with transcriptional regulators and fluorescent reporters. This composite structure integrates multiple functional elements to achieve both specific metabolite detection and robust gene expression control, overcoming the limitations of individual components.
3Manufacturing precision
If millions of bacterial strains are screened for metabolite production, then optimized strains can be identified, but the scalability and effectiveness of chemical production is limited
Solution Approach 1:
The patent replaces the mechanical process of screening millions of strains with an automated fluorescent detection system. The biosensor allows high-throughput screening where metabolite production is directly correlated with fluorescent signal intensity, enabling rapid identification of optimized strains without manual intervention.
Solution Approach 2:
The patent uses fluorescent proteins as optical copies or proxies for metabolite production. Instead of directly measuring metabolite concentrations in each strain, the system creates a fluorescent copy of the production phenotype through the biosensor, allowing rapid visual and instrumental assessment of thousands of strains simultaneously.
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 the rapid identification and isolation of bacterial strains with desirable metabolite production levels, optimizing chemical production by selecting strains that produce increased amounts of the target metabolite, thereby improving the efficiency and scalability of metabolic engineering.
Implementation Method 1
the sensor or metabolite binding molecule is an allosteric biomolecule that undergoes a conformation change upon binding a desired chemical or metabolite resulting in a change in gene regulation
Implementation Method 2
If the reporter, such as a fluorescent molecule, is produced within the microorganism, it can be detected by methods known to those of skill in the art. According to one aspect, the level of fluorescence is proportional to the amount of metabolite produced.
Data Source
AI summary
Methods of making and monitoring metabolites in cells are provided.