Allosteric Protein Sensors for Target Molecule Detection
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Solution Overview
Problem
Current methods for detecting and producing target molecules in synthetic biology face bottlenecks due to limitations in screening and engineering bacterial allosteric transcription factors, which require simultaneous engineering of sensing and actuation functions.
Innovation Solution
Development of engineered allosteric DNA-binding protein sensors and switches that can be designed to bind specific target molecules, using in silico methods and reporter gene systems to select for cells that respond to these molecules, allowing for improved detection and production of target molecules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If bacterial allosteric transcription factors are used to detect target molecules, then molecular recognition is achieved, but the device complexity increases due to requiring simultaneous engineering of sensing and actuation functions
Solution Approach 1:
The patent divides the sensing system into separate functional modules: a sensor protein that detects the target molecule and a reporter system that provides the detectable signal. This segmentation allows independent optimization of sensing and reporting functions, reducing the engineering complexity of simultaneously designing both functions in a single allosteric transcription factor system.
Solution Approach 2:
The patent introduces an intermediary reporter system (such as fluorescent proteins or other detectable molecules) that mediates between the sensor protein's conformational change and the final detectable signal. This intermediary approach simplifies the sensor design by decoupling the molecular recognition function from the signal generation function.
2Adaptability or versatility
If allosteric transcription factors are engineered for new molecular recognition, then sensing capability is improved, but the loss of time increases due to the lengthy design-build-test cycle
Solution Approach 1:
The patent employs computational design methods to perform preliminary modeling and prediction of sensor protein behavior before experimental construction. This preliminary action allows researchers to optimize sensor designs in silico, reducing the number of iterative build-test cycles needed and thereby reducing the overall development time while maintaining sensing capability.
Solution Approach 2:
The patent utilizes standardized reporter systems and modular sensor architectures that can be copied and adapted across different target molecules. By creating reusable computational models and standardized components, the patent accelerates the development of new sensors by avoiding redundant design work.
3Measurement precision
If standard screening methods are used in synthetic biology, then current detection capabilities are maintained, but productivity decreases due to screening limitations
Solution Approach 1:
The patent employs fluorescent reporter systems that produce visible color changes or fluorescence signals in response to target molecule detection. This allows for high-throughput screening using flow cytometry or plate readers, dramatically increasing productivity compared to traditional screening methods while maintaining detection precision through quantitative fluorescence measurement.
Solution Approach 2:
The patent replaces traditional mechanical or manual screening methods with automated optical detection systems. By substituting fluorescent-based detection for conventional screening approaches, the system enables parallel processing of numerous samples, thereby increasing screening efficiency and productivity without sacrificing detection accuracy.
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 detection and production of a variety of target molecules by designing protein sensors that undergo conformational changes upon binding, facilitating the selection of cells that produce desired molecules at optimal levels.
Implementation Method 1
Allostery is a common feature of proteins, in which the behavior at an 'active' site is altered by binding of an effector to a second or 'allosteric' site, often quite distant from the first (about 10A or more). The protein's conformational change caused by effector binding modulates its affinity for a specific operator DNA sequence
Implementation Method 2
The protein's conformational change caused by effector binding modulates its affinity for a specific operator DNA sequence
Implementation Method 3
engineered allosteric DNA-binding protein sensors and switches that can be designed to bind specific target molecules
Data Source
AI summary
The present described inventions relate, inter alia, to methods and compositions that provide for improved detection of target molecules.