MHC Ligand Cleavage via Conditional Reactive Groups
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Solution Overview
Problem
Current methods for producing MHC molecules occupied with a defined ligand are inefficient due to the instability of peptide-free MHC molecules, requiring harsh conditions for ligand dissociation and resulting in a time-consuming, costly process yielding small batches for specific applications.
Innovation Solution
Incorporating a conditionally reactive group into MHC molecules or their ligands, allowing for controlled cleavage of covalent bonds to reduce noncovalent interactions and release ligands without destabilizing the MHC structure, enabling efficient generation of ligand-free MHC molecules that can be loaded with desired peptides.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If harsh conditions are used to dissociate ligands from MHC molecules, then ligand release is achieved, but the MHC structure is destabilized and production efficiency decreases
Solution Approach 1:
The ligand is segmented by introducing a conditional cleavage site that allows specific bonds within the ligand to be broken under controlled conditions, enabling dissociation from the MHC molecule without applying harsh conditions that would destabilize the MHC structure itself
Solution Approach 2:
The dissociation process utilizes changes in specific parameters (such as pH, temperature, or chemical environment) that selectively trigger bond cleavage in the ligand while maintaining conditions that preserve MHC structural integrity, thereby resolving the contradiction between easy dissociation and structural stability
2Quantity of substance
If conventional methods are used to produce ligand-free MHC molecules, then small batches can be obtained, but the process is time-consuming and costly
Solution Approach 1:
The MHC molecules are pre-loaded with ligands containing conditional cleavage sites during the production process, allowing for rapid subsequent dissociation and reloading operations. This preliminary preparation enables high-throughput production by eliminating time-consuming steps in the ligand exchange process
Solution Approach 2:
The method enables efficient discarding of ligands from MHC molecules under mild conditions and rapid recovery of ligand-free MHC for reloading with new ligands, significantly increasing production throughput and reducing both time and cost compared to conventional methods
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 allows for the production of large quantities of MHC molecules with varied ligands, minimizing interference with the MHC structure and enabling high-throughput production of MHC complexes for diagnostic and therapeutic applications.
Implementation Method 1
Incorporating a conditionally reactive group into MHC molecules or their ligands, allowing for controlled cleavage of covalent bonds to reduce noncovalent interactions and release ligands
Data Source
AI summary
The present invention concerns multimeric proteinaceous molecules comprising at least two members that bind each other via a region of noncovalent interaction, wherein a first of the members comprises a conditionally reactive group that, when activated, cleaves a covalent bond within the first member. Cleavage of the covalent bond results in a reduction in the binding strength with which the at least two members bind to each other via the region of noncovalent interaction. The reduction in the binding strength can result in the separation of the members under mild conditions.