Bacteriocin Pro-Polypeptide Expression for Precise Ratio Control
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Solution Overview
Problem
Current methods for producing bacteriocins often result in variable concentrations and can be toxic to host cells, making it challenging to achieve precise ratios of bacteriocins for effective microbial control.
Innovation Solution
A method involving the expression of a nucleic acid encoding a pro-polypeptide containing bacteriocin coding sequences and cleavage sites, allowing for the production of specific ratios of active bacteriocins through controlled cleavage of the pro-polypeptide.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple separate methods are used to produce different bacteriocins, then each bacteriocin can be produced, but the concentrations vary and precise ratios cannot be achieved
Solution Approach 1:
The patent combines multiple bacteriocin coding sequences into a single nucleic acid molecule with a single reading frame, allowing simultaneous expression of multiple bacteriocins in a single production system. This merging approach enables precise control over the ratios of different bacteriocins while simplifying the overall production process compared to using multiple separate production methods.
2Reliability
If bacteriocins are produced to control microbial growth, then undesired microbial organisms can be targeted, but host cell toxicity may occur
Solution Approach 1:
The patent employs specific cleavage sites positioned between bacteriocin coding sequences that are selectively cleaved by certain proteases. This creates local differences in the polypeptide structure that allow for controlled release of bacteriocins under specific conditions, enabling effective microbial control while reducing unintended toxicity to host cells through regulated activation.
3Manufacturing precision
If a single nucleic acid encodes multiple bacteriocins, then precise ratios can be achieved, but the nucleic acid structure becomes more complex
Solution Approach 1:
The patent segments the single nucleic acid molecule into distinct coding sequences for different bacteriocins, with specific cleavage sites positioned between them. This segmentation allows each bacteriocin to be independently controlled and released at precise ratios through selective cleavage, achieving manufacturing precision while maintaining a manageable nucleic acid structure that can be synthesized and manipulated using standard molecular biology techniques.
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 precise production of bacteriocin compositions with desired ratios, effectively targeting undesired microbial organisms while minimizing impact on desired microbial populations.
Implementation Method 1
The nucleic acid can further comprise cleavage site coding sequences disposed between the bacteriocin coding sequence and the second polypeptide coding sequence in the single reading frame. Thus, a pro-polypeptide comprising the bacteriocin, second polypeptide, and cleavage sites disposed between the bacteriocin and second polypeptide can be generated. In some embodiments, the method further comprises cleaving the cleavage site, thus separating the bacteriocin and second polypeptide from each other.
Data Source
AI summary
Methods and compositions for making bacteriocins are described in some embodiments herein. In some embodiments, pro-polypeptide comprising the bacteriocins in the desired ratios in cis, and separated by cleavage sited can be produced by a microbial cell comprising a nucleic acid encoding the pro-polypeptide. In some embodiments microfluidic devices and methods for making specified mixtures of antimicrobial peptides and/or bacteriocins are described.