Multidimensional Infrared Spectroscopy for Rapid Protein Interaction Detection
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Solution Overview
Problem
Current methods for detecting protein-ligand interactions, such as 2D NMR spectroscopy, are limited by slow data acquisition times, large sample volumes, and inability to detect transient interactions on sub-millisecond timescales, making them inefficient for high-throughput screening and requiring significant resources.
Innovation Solution
Multidimensional vibrational and electronic spectroscopy techniques, like 2D IR spectroscopy, are used to rapidly detect and characterize interactions between biomolecules and therapeutic candidates by coherently exciting vibrational modes and measuring changes in signal beams, allowing for faster and more sensitive analysis with smaller sample volumes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If 2D NMR spectroscopy is used to detect protein-ligand interactions, then measurement precision is improved, but data acquisition time increases and productivity decreases
Solution Approach 1:
The patent replaces NMR spectroscopy with infrared (IR) spectroscopy-based methods. Specifically, it uses difference spectroscopy, 2D IR spectroscopy, and vibrational sum frequency generation (VSFG) spectroscopy to detect protein-ligand interactions. This substitution enables faster data acquisition (sub-millisecond timescales) while maintaining detection sensitivity, directly resolving the contradiction between measurement precision and productivity.
Solution Approach 2:
The patent changes the spectroscopic parameters by transitioning from NMR frequency ranges to IR frequency ranges, and by employing different detection methodologies (difference spectroscopy, 2D IR, VSFG). These parameter changes enable the system to achieve both high measurement precision and fast data acquisition speeds, overcoming the limitations of conventional NMR methods.
2Measurement precision
If 2D NMR spectroscopy is used to characterize molecular interactions, then measurement precision is improved, but sample volume requirements increase
Solution Approach 1:
The patent substitutes NMR spectroscopy with IR spectroscopy methods (difference spectroscopy, 2D IR, VSFG). These IR-based techniques require significantly smaller sample volumes while maintaining the ability to accurately characterize molecular interactions, thus resolving the contradiction between measurement precision and quantity of substance required.
3Ease of operation
If conventional spectroscopy methods are used to detect protein interactions, then ease of operation is maintained, but the ability to detect transient interactions on sub-millisecond timescales is lost
Solution Approach 1:
The patent replaces conventional spectroscopy with advanced IR spectroscopy techniques including 2D IR spectroscopy and vibrational sum frequency generation (VSFG). These methods operate on sub-millisecond timescales, enabling detection of transient protein interactions while remaining relatively straightforward to implement, thus resolving the contradiction between ease of operation and time resolution.
Solution Approach 2:
The patent employs pulsed laser techniques in 2D IR and VSFG spectroscopy, using periodic excitation and detection schemes. This periodic action enables time-resolved measurements on sub-millisecond timescales while maintaining operational simplicity through automated data collection and analysis protocols.
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
This approach enables rapid detection and characterization of protein interactions on sub-millisecond timescales with reduced sample requirements, enhancing the efficiency of high-throughput screening and drug discovery processes.
Implementation Method 1
coherent light of a first selected wavelength and coherent light of a second selected wavelength are directed onto the first molecule, second molecule or both and coherently excite molecular vibrations
Implementation Method 2
coherently excite molecular vibrations in the first molecule, the second molecule or both
Implementation Method 3
the signal beam propagates along an axis spatially separated from the propagation axes of the coherent light of the first selected wavelength and the coherent light of the second selected wavelength
Data Source
AI summary
This invention provides methods and devices for identifying and/or characterizing interactions involving molecules, including, but not limited to, identifying and/or characterizing interactions involving target molecules and candidate molecules. The present invention provides methods using multidimensional infrared spectrographic techniques, such as four wave mixing and pump-probe techniques, for identifying interactions involving biomolecules and therapeutic candidate molecules, and for characterizing such interactions in terms of their binding coefficients and/or equilibrium constants.