Disulfide Bonded Peptide Oxidation in Concentrated Small-Volume Reactions
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Solution Overview
Problem
Existing methods for synthesizing disulfide bonded peptides at an industrial scale are limited by scalability, cost-effectiveness, and the formation of unwanted by-products such as disulfide-bonded dimers and multimers, which are difficult to control and require impractical handling of large volumes of peptide solutions.
Innovation Solution
A method involving the simultaneous addition of concentrated peptide and oxidizing agent solutions into a reaction mixture, maintaining a constant and zero average concentration of the oxidizing agent during the addition process, followed by continued addition of the oxidizing agent after peptide addition, to form disulfide bonds efficiently and instantaneously.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If dilute peptide solution is used to suppress intermolecular disulfide bond formation, then intramolecular disulfide bond formation is improved, but reaction volume becomes impractically large and scalability is limited
Solution Approach 1:
The patent changes the concentration parameter from dilute to concentrated (10-1000 times more concentrated), and simultaneously changes the addition mode from sequential to simultaneous, maintaining zero average oxidizing agent concentration to prevent intermolecular bonding while enabling intramolecular bond formation in small volumes
Solution Approach 2:
The patent employs periodic addition of oxidizing agent to maintain zero average concentration during simultaneous addition of concentrated peptide solution, creating a dynamic control regime that alternates between oxidation and prevention of over-oxidation
2Productivity
If oxidizing agent is added in excess to ensure complete oxidation, then disulfide bond formation is improved, but excessive oxidation of sensitive side chains occurs
Solution Approach 1:
The patent implements feedback control by monitoring the oxidation state and adjusting oxidizing agent addition rate to maintain zero average concentration, ensuring complete disulfide bond formation while preventing over-oxidation of sensitive side chains through real-time concentration regulation
3Device complexity
If conventional sequential addition method is used, then process simplicity is maintained, but intermolecular disulfide bond by-products are formed
Solution Approach 1:
The patent uses periodic addition of oxidizing agent during simultaneous peptide solution addition, creating oscillating concentration conditions that favor intramolecular bond formation while minimizing intermolecular by-products, achieving high specificity with manageable process complexity
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 high-quality disulfide bonded peptides in high concentration, avoiding excessive oxidation of sensitive side chains and reducing the need for large reaction volumes, thus enhancing scalability and cost-effectiveness.
Implementation Method 1
a solution of an oxidizing agent is simultaneously added into said reaction medium... to form disulfide bonds
Data Source
AI summary
A method and apparatus for the manufacture of disulfide bonded peptides is provided, wherein a solution of an oxidizing agent and a solution of a peptide comprising at least two sulfhydryl groups are added simultaneously into a reaction vessel under such conditions that the average concentration of the oxidizing agent inside the reaction vessel is essentially zero during simultaneous addition.