Thermally Sensitive Cysteine Protecting Groups for Peptide Synthesis
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Solution Overview
Problem
Current peptide synthesis methods face challenges in efficiently forming specific disulfide bonds, leading to increased complexity, cost, and reduced yield due to the need for multiple protecting groups and customized reagents, which complicates the formation of correct three-dimensional structures in peptides.
Innovation Solution
A protecting group based on a Diels-Alder cycloadduct of a furan and a maleimide, optionally with a cyclization spacer, that allows for sequential deprotection of cysteine residues at different temperatures, enabling the formation of multiple disulfide bonds in a single pot without the need for multiple reagents or purification steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple protecting groups are used to form specific disulfide bonds, then the correctness of three-dimensional structure is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent employs protecting groups with different thermal sensitivities that can be selectively removed at different temperatures. By changing the temperature parameter during the reaction process, specific disulfide bonds are formed in a controlled sequence, achieving the correct three-dimensional structure without requiring complex multiple protecting group systems
Solution Approach 2:
The patent utilizes thermal phase transitions to control the deprotection process. Heating the reaction mixture to specific temperatures triggers the removal of thermally sensitive protecting groups, enabling sequential disulfide bond formation. This phase transition-based control simplifies the overall synthesis process while maintaining precision
2Manufacturing precision
If multiple protecting groups and customized reagents are used, then specific disulfide bonds are formed, but the productivity and yield are reduced
Solution Approach 1:
The patent uses a single thermally sensitive protecting group type that can be removed at different temperatures. By adjusting the temperature parameter, multiple disulfide bonds are formed sequentially in one pot, eliminating the need for multiple reagents and purification steps, thereby improving both yield and productivity while maintaining specificity
Solution Approach 2:
The patent combines multiple disulfide bond formation steps into a single reaction pot by using protecting groups with different thermal sensitivities. This merging of steps eliminates intermediate purification operations and reduces the number of reagents required, significantly improving productivity and overall yield
3Manufacturing precision
If multiple protecting groups are used for sequential disulfide bond formation, then the three-dimensional structure is achieved, but the loss of time and increased cost occur
Solution Approach 1:
The patent exploits thermal phase transitions to control protecting group removal. By heating to different temperatures in a sequential manner, different protecting groups are removed at appropriate stages, enabling accurate disulfide bond formation without time-consuming intermediate purification steps
Solution Approach 2:
The protecting groups are designed with predetermined thermal sensitivities that automatically trigger deprotection at specific temperatures. This preliminary design of thermal response characteristics allows the reaction to proceed through multiple stages without manual intervention or purification, saving time while maintaining structural accuracy
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 simplifies the formation of disulfide bonds, reduces by-products, and facilitates the production of peptides with specific three-dimensional structures, such as insulin and conotoxins, by allowing for controlled thermal deprotection, thereby improving yield and scalability.
Implementation Method 1
A protecting group based on a Diels-Alder cycloadduct of a furan and a maleimide, optionally with a cyclization spacer, that allows for sequential deprotection of cysteine residues at different temperatures
Data Source
AI summary
In a preferred embodiment, there is provided a protecting group for protecting the thiol side chain of a cysteine residue, the protecting group comprising a Diels-Alder cycloadduct of a furan and a maleimide, and optionally, a linker interposed between the thiol side chain and the Diels-Alder cycloadduct.