Corynebacterium α-glucosidase for L-amino acid yield
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Solution Overview
Problem
Current methods for producing L-amino acids in microorganisms, such as those from the genus Corynebacterium, face challenges in optimizing sugar availability and productivity, with a need to enhance the correlation between sugar availability and L-amino acid production.
Innovation Solution
Introducing α-glucosidase, an enzyme that decomposes isomaltose and maltose, into a Corynebacterium strain to enhance the activity of α-glucosidase, thereby improving the yield of L-amino acid production by increasing sugar decomposition and utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional fermentation methods using Corynebacterium or Escherichia are used for L-amino acid production, then production capability is maintained, but productivity and yield are limited due to insufficient sugar availability and utilization efficiency
Solution Approach 1:
The patent introduces α-glucosidase to change the biochemical parameter of sugar decomposition capability in the microorganism. This enzyme enables the breakdown of complex carbohydrates (starch, glycogen) into simpler sugars (maltose, isomaltose, glucose), fundamentally altering how the microorganism utilizes carbon sources and thereby improving L-amino acid productivity
2Productivity
If genes coding enzymes for L-amino acid biosynthesis are overexpressed, then biosynthesis efficiency is improved, but sugar utilization efficiency remains a limiting factor
Solution Approach 1:
The patent introduces α-glucosidase as an intermediary enzyme that facilitates the conversion of complex carbohydrates into可利用 sugars. This intermediary component bridges the gap between available carbon sources (starch, glycogen) and the biosynthesis pathway, enabling more efficient sugar utilization and thereby supporting higher L-amino acid production yields
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 enhanced activity of α-glucosidase in the microorganism leads to increased L-amino acid productivity, effectively addressing the limitations of previous methods by improving yield without the need for additional substrates like isomaltose and maltose.
Implementation Method 1
introducing α-glucosidase, which is known to decompose isomaltose and maltose
Implementation Method 2
α-glucosidase...decomposes isomaltose and maltose
Data Source
AI summary
The present disclosure relates to a microorganism for producing an L-amino acid with enhanced activity of α-glucosidase and a method for producing an L-amino acid using the same. According to the present disclosure, the microorganism of the genus Corynebacterium producing an L-amino acid has enhanced activity of α-glucosidase, thereby improving L-amino acid production yield. Therefore, the microorganism may be very usefully used for L-amino acid production.