Manganese-Dependent Regulator Variant for L-Glutamic Acid Yield
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for producing L-glutamic acid do not achieve high yields efficiently, necessitating the development of microorganisms with improved production capabilities.
Innovation Solution
A manganese-dependent transcriptional regulator variant polypeptide is introduced, specifically altering the amino acid at position 160 of SEQ ID NO: 1, enhancing the L-glutamic acid-producing ability of Corynebacterium microorganisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional fermentation methods using unmodified microorganisms are used, then the production process is simple, but the L-glutamic acid yield is low
Solution Approach 1:
The patent applies parameter changes by modifying the amino acid sequence of the manganese-dependent transcriptional regulator protein (specifically substituting amino acid at position 160 with aspartic acid). This genetic parameter modification enhances the microorganism's ability to produce L-glutamic acid, achieving higher yields without fundamentally changing the fermentation process itself.
2Productivity
If gene removal methods are used to improve amino acid production, then unnecessary genes are eliminated, but the overall production efficiency is still insufficient
Solution Approach 1:
Instead of removing genes, the patent modifies the regulatory protein's amino acid parameters to enhance its function. The substitution of aspartic acid at position 160 of the manganese-dependent transcriptional regulator optimizes gene expression control, leading to both higher production efficiency and maintained stability.
3Productivity
If more genes are removed to improve production, then the production pathway is simplified, but the yield improvement becomes diminishing
Solution Approach 1:
The patent achieves significant yield improvement through a single amino acid substitution (aspartic acid at position 160) rather than multiple gene removals. This approach simplifies the strain development process while maintaining high productivity, avoiding the diminishing returns associated with extensive gene removal.
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
The variant polypeptide enables higher yields of L-glutamic acid production compared to unmodified microorganisms, improving fermentation efficiency.
Implementation Method 1
A usual method of producing glutamic acid includes production through fermentation using a microorganism of the genus Brevibacterium or Corynebacterium
Data Source
AI summary
The present application pertains to a novel manganese-dependent transcription regulator variant polypeptide; a polynucleotide encoding the variant polypeptide; a microorganism containing the variant polypeptide, a polynucleotides encoding the variant polypeptide, or a vector carrying the polynucleotide; a method for producing L-glutamic acid, the method including a step of culturing the microorganism in a medium; and a use of the microorganism for the production of L-glutamic acid.