Genome-wide Mutations for Enhanced Lysine Production in E. coli
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for enhancing lysine production in E. coli are limited, as they primarily focus on the diaminopimelate biosynthetic pathway, neglecting potential contributions from other genomic loci, which can lead to suboptimal yields in industrial production settings.
Innovation Solution
Employing nucleic acid-guided nuclease editing to introduce precise and rationally-designed mutations across the E. coli genome, including double and triple combinations of variant sequences, to optimize lysine production by targeting genes beyond the traditional DAP pathway.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If genome-wide mutations are introduced to enhance lysine production, then lysine yield increases significantly, but the complexity of genetic engineering increases
Solution Approach 1:
The patent segments the genome-wide mutagenesis process into targeted modules: (1) selection of specific gene loci involved in lysine metabolism, (2) introduction of individual point mutations or small insertions/deletions at each locus, and (3) systematic combination of multiple mutated genes. This modular approach allows complex genomic optimization to be managed through discrete, controllable steps while achieving synergistic effects in lysine production.
Solution Approach 2:
The patent systematically varies genetic parameters by introducing different types of mutations (point mutations, insertions, deletions) at specific gene loci. By changing the amino acid sequences of enzymes in the lysine pathway and their regulatory proteins, the patent optimizes metabolic flux and enzyme activity parameters to maximize lysine yield while maintaining cellular viability.
2Productivity
If multiple variant sequences are combined to optimize lysine production, then production levels increase, but the difficulty of strain construction increases
Solution Approach 1:
The patent performs preliminary characterization of individual gene mutations and their effects on lysine production before combining them. By pre-identifying beneficial mutations and their synergistic potential, the patent reduces the trial-and-error process in constructing multi-mutant strains, making the combination of variant sequences more systematic and less difficult.
Solution Approach 2:
The patent employs feedback mechanisms by measuring lysine production levels at each stage of strain construction and using this information to guide subsequent mutation combinations. This iterative optimization process allows the research team to identify the most effective gene combinations while minimizing unnecessary experimental complexity.
Data Source
AI summary
The present disclosure relates to various different types of variants in E. coli coding and noncoding regions leading to enhanced lysine production for, e.g., supplements and nutraceuticals.