Terahertz Sensing Element for Protein Conformational Change Detection
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Solution Overview
Problem
Conventional methods for measuring protein receptor activity are hindered by high absorbance of buffer solutions in the terahertz region, leading to reduced signal-to-noise ratio (SNR) and requiring large solid-phase samples or ultra-low temperatures.
Innovation Solution
A system utilizing a sensing element with a substrate and film patterned with rectangular slots to amplify electromagnetic waves in the terahertz band, combined with light irradiation and detection units to measure conformational changes in proteins without physical contact, allowing real-time observation of protein dynamics in neurons.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a buffer solution is used to maintain protein activity, then the protein conformational change can be maintained, but the signal-to-noise ratio is reduced due to high absorbance in the terahertz region
Solution Approach 1:
The patent introduces a sensing element as an intermediary component that couples the protein solution to the terahertz wave. This sensing element acts as a mediator that enables terahertz wave interaction with the protein while minimizing the direct interaction between the buffer solution and the terahertz wave, thereby reducing the harmful absorbance effect and improving the signal-to-noise ratio while maintaining protein activity.
2Measurement precision
If conventional measurement methods are used to achieve acceptable signal-to-noise ratio, then a large amount of solid-phase sample is required, but this reduces the ability to measure trace amounts of neurotransmitters
Solution Approach 1:
The patent changes the measurement parameters by using terahertz frequency electromagnetic waves and introducing a sensing element with specific structural parameters (rectangular slots with optimized dimensions). This parameter change enables highly sensitive detection that requires only trace amounts of protein sample, eliminating the need for large solid-phase samples while maintaining or improving signal-to-noise ratio.
3Measurement precision
If conventional measurement methods are used to reduce buffer solution interference, then ultra-low temperature apparatus is required, but this increases device complexity and reduces ease of operation
Solution Approach 1:
The sensing element serves as an intermediary that eliminates the need for ultra-low temperature apparatus. By coupling the protein solution to the terahertz wave through this intermediary structure, the system achieves high signal-to-noise ratio at room temperature, thereby reducing device complexity and improving ease of operation while maintaining measurement precision.
4Measurement precision
If a sensing element with rectangular slots is used to amplify electromagnetic wave, then the sensitivity is improved, but the device structure becomes more complex
Solution Approach 1:
The sensing element uses specific structural parameters (rectangular slots with optimized width, length, and depth) to amplify the terahertz electromagnetic wave. This parameter optimization enables high sensitivity detection. While the structure is more complex than conventional methods, the patent demonstrates that this complexity is justified by the significant improvement in sensitivity and the ability to perform measurements at room temperature with trace samples.
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 sensitive, real-time detection of protein conformational changes and dynamics using a small protein sample at room temperature, improving sensitivity and reducing the need for large samples or extreme conditions.
Implementation Method 1
a sensing element which is configured to amplify an electromagnetic wave of a specific frequency
Implementation Method 2
a light irradiation unit which is configured to irradiate a photoreceptor protein solution coated on the sensing element with light
Implementation Method 3
a detection unit which is configured to detect an electromagnetic wave reflected from the bottom surface of the sensing element
Data Source
AI summary
Disclosed is a system for observing the conformational change in a protein, which includes a sensing element which is configured to amplify an electromagnetic wave of a specific frequency; a light irradiation unit which is configured to irradiate a photoreceptor protein solution coated on the sensing element with light; an electromagnetic wave irradiation unit which allows an electromagnetic wave to be incident in a direction perpendicular to the bottom surface of the sensing element; a detection unit which is configured to detect an electromagnetic wave reflected from the bottom surface of the sensing element; and a control unit which is configured to observe the conformational change in the photoreceptor protein based on the detected electromagnetic wave.