Protein Binding Domain Mapping via Organic Masking Molecules
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Solution Overview
Problem
Current methods for identifying protein-protein interactions are error-prone, time-consuming, require large amounts of protein, or genetic tagging, and cannot accurately determine the amino acid sequence of binding domains, leading to incorrect identification of interaction sites and artifacts.
Innovation Solution
The use of aryl hydrocarbon containing organic compounds and small organic masking molecules to bind with high affinity to protein surfaces, allowing for the mapping of binding domains by forming complexes, unfolding proteins, and analyzing the regions not bound by these molecules, which can then be sequenced to reveal interaction sites.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional experimental approaches (Two-hybrid screening, Tandem Affinity Purification, X-ray tomography) are used to identify protein interactions, then protein-protein interactions can be detected, but the methods are error-prone, time-consuming, require large amounts of protein, and cannot accurately determine amino acid sequences of binding domains
Solution Approach 1:
The method applies small organic masking molecules to proteins before interaction analysis, pre-marking the surfaces that will be involved in binding. This preliminary action allows direct identification of binding domains without time-consuming traditional screening methods, as the masked regions directly reveal the interaction interfaces when proteins are subsequently analyzed
Solution Approach 2:
Small organic masking molecules serve as intermediaries that bind to protein surfaces and prevent other molecules from accessing binding domains. These intermediaries carry detectable markers that reveal the location and sequence of binding domains, enabling accurate identification without requiring large amounts of protein or extensive screening
2Measurement precision
If traditional methods are used to map binding domains, then interaction sites can be identified, but the methods produce artifacts and cannot determine amino acid sequences of interacting domains
Solution Approach 1:
The method extracts and isolates the binding domain information by using masking molecules that specifically occupy interaction interfaces. By removing the masking molecules or analyzing the protected regions, the exact amino acid sequences of binding domains are revealed without contamination from artifacts generated by traditional methods
Solution Approach 2:
The patent replaces mechanical and genetic manipulation methods (such as genetic tagging and physical purification) with a chemical approach using small organic masking molecules. This substitution eliminates the artifacts inherent in mechanical methods while providing direct sequence information about binding domains through the molecular markers attached to the masking agents
3Quantity of substance
If large amounts of protein are used in traditional screening methods, then sufficient material is available for analysis, but the process becomes more time-consuming and resource-intensive
Solution Approach 1:
The method changes the concentration parameter by using highly sensitive masking molecules that function at very low protein concentrations. The masking molecules are applied in excess to ensure complete coverage of binding domains, allowing analysis with minimal protein material while maintaining high detection sensitivity and rapid throughput
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 the rapid and direct identification and sequencing of protein-protein interaction interfaces without modifying the proteins, providing accurate information on binding sites and potentially leading to new therapeutic strategies by blocking aberrant interactions.
Implementation Method 1
aryl hydrocarbon containing organic compound less than 30 Angstroms in total length taken from at least one of the following structure formulas listed below, or salts or solvates thereof, complexed or bound to a portion of a protein polypeptide chain
Implementation Method 2
Small organic masking molecules bind protein polypeptides with high affinity and span a small region comprising approximately 3 amino acids
Implementation Method 3
unfolding the protein to reveal the regions of the polypeptide chain that do not contain the complex(s)
Data Source
AI summary
The present disclosure relates to compositions and methodology for revealing binding sites between proteins, proteins and nucleic acids, or proteins and small molecules. The disclosure provides rapid and direct positive identification and sequencing of the contact region between such molecules, and can be applied to individual interacting pairs, as well as large-scale or global interactions.