Multi-Dye Fluorescence Protein Melt Analysis
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for protein stability screening are either slow and tedious or require large protein samples and high costs, making it challenging to efficiently identify ligands, mutations, or buffer conditions that affect protein melting temperature and stability.
Innovation Solution
The use of Protein Thermal Shift (PTS) assays involving mixtures of dyes, such as SYPRO Orange, SYPRO Red, and SYPRO Tangerine, to determine protein melt temperature by measuring fluorescence over a temperature range, allowing for the identification of conditions that stabilize proteins and analyze protein-ligand interactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional protein stability screening methods are used, then measurement accuracy is maintained, but screening speed is slow and productivity is low
Solution Approach 1:
The patent segments the fluorescence measurement process by using multiple dyes with distinct emission spectra that can be simultaneously excited and detected at different wavelengths. This allows parallel monitoring of multiple protein samples or conditions in a single thermal shift assay, thereby increasing screening throughput without sacrificing measurement accuracy
Solution Approach 2:
The patent combines multiple fluorophore dyes into a single assay mixture to simultaneously monitor protein thermal stability. By merging the detection capabilities of multiple dyes with different emission spectra into one experiment, the method achieves high-throughput screening while maintaining the precision of individual measurements
2Productivity
If high-throughput screening is implemented, then productivity increases, but protein sample quantity and cost increase
Solution Approach 1:
The patent extracts and amplifies the fluorescent signal from small amounts of protein by using highly sensitive fluorophore dyes that bind to hydrophobic regions exposed during protein unfolding. This extraction of signal from minimal sample allows high-throughput screening with reduced protein consumption
Solution Approach 2:
The patent replaces traditional mechanical or manual screening methods with optical detection using fluorescence. This substitution enables automated, high-throughput measurement of protein thermal stability requiring only minimal protein sample quantities, as the fluorescent signal provides amplification of the detection effect
3Measurement precision
If multiple dyes are used to improve screening capability, then measurement precision increases, but device complexity increases
Solution Approach 1:
The patent employs dynamic spectral separation where multiple dyes are excited simultaneously but their emission spectra are distinguished through wavelength-specific detection. This dynamic approach allows precise measurement of protein stability using multiple dyes while maintaining relatively simple assay composition and detection setup
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, high-throughput screening of protein stability and interactions with minimal protein sample requirements, providing detailed insights into protein stability and interactions without prior knowledge of protein function or ligand activity.
Implementation Method 1
measuring fluorescence emitted over a temperature range
Implementation Method 2
applying controlled heating to the mixture
Data Source
AI summary
According to the present teachings, compositions, kits, and methods for protein melt analysis are provided that utilizing one or more fluorophore dyes. In some embodiments, a method comprises preparing a sample by mixing at least one protein with two or more dyes, and applying a controlled heating, while recording the fluorescence emission of the sample. The methods can be used, for example, for screening conditions for optimized protein stability, screening for ligands that bind and enhance protein stability (e.g., protein-protein interactions), screening for mutations for enhanced stability, screening crystallization conditions for protein stability, screening storage conditions for protein stability, and screening conditions in which a protein will be used (e.g., production conditions, treatment conditions, etc.) for protein stability.