Recombinant Host Cells for Ambient Glyceric Acid Fermentation
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Solution Overview
Problem
Current methods for synthesizing glyceric acid and its derivatives require hazardous petrochemicals and extreme process conditions, posing health and environmental risks, and there is a need for a safer, cheaper, and more efficient production method.
Innovation Solution
Recombinant host cells are developed to produce glyceric acid and derivatives through microbial fermentation using renewable feedstocks, operating at ambient atmospheric pressure and temperature, incorporating heterologous nucleic acids for the glyceric acid biosynthetic pathway and ancillary proteins for redox cofactor recycling and organic acid transport.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If catalytic oxidation of glycerol with precious metal catalysts is used to produce glyceric acid, then production yield is improved, but health and safety risks increase due to hazardous materials and extreme temperatures
Solution Approach 1:
The patent replaces the chemical catalytic oxidation process with a microbial fermentation system using engineered yeast cells. The biological system uses enzymes (biocatalysts) instead of harsh chemical catalysts like palladium and platinum, eliminating toxic chemicals while maintaining production capability through metabolic pathways that convert glycerol to glyceric acid under mild conditions
Solution Approach 2:
The patent changes the operating parameters from extreme conditions (high temperature, high pressure, hazardous chemicals) to mild biological conditions (ambient temperature, neutral pH, aqueous environment). The engineered yeast performs the conversion at biological operating conditions, fundamentally changing the process parameters to eliminate hazards while maintaining productivity
2Productivity
If hydrative carbonylation of formaldehyde with carbon monoxide and sulfuric acid is used to produce glycolic acid, then production efficiency is improved, but environmental harm increases due to toxic air contaminants and extreme pressures
Solution Approach 1:
The patent replaces the chemical carbonylation process with a biological fermentation pathway. Engineered yeast cells use enzymatic reactions to convert sugars into glycolic acid and other products, eliminating the need for toxic chemicals like sulfuric acid and carbon monoxide. The biological system performs the transformation under ambient conditions, removing harmful emissions
Solution Approach 2:
The patent converts harmful industrial chemicals into beneficial biological catalysts. Instead of using toxic sulfuric acid and carbon monoxide, the system employs engineered yeast that naturally metabolize sugars through controlled biochemical pathways, transforming a harmful chemical process into a benign biological one that produces the same or superior products without pollution
3Ease of manufacture
If saponification of chloroacetic acid with alkali metal hydroxide is used to produce glyceric acid, then production cost is reduced, but health and safety risks increase due to toxic materials and extreme temperatures
Solution Approach 1:
The patent replaces the chemical saponification process with a microbial fermentation system. The engineered yeast uses metabolic pathways to produce glyceric acid from sugar feedstocks, eliminating the need for toxic chloroacetic acid and alkali metal hydroxide. This biological approach maintains cost-effectiveness while removing hazardous materials from the process
Solution Approach 2:
The patent introduces engineered yeast cells as intermediary biological catalysts that mediate the conversion of sugar to glyceric acid. Instead of using harsh chemical reagents directly, the system employs a biological intermediary that performs the transformation through safe enzymatic reactions, acting as a bridge between the benign sugar feedstock and the desired product without requiring toxic intermediaries
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 method achieves high yields and productivity of glyceric acid and its derivatives, reducing costs and environmental impact while avoiding hazardous materials and extreme conditions.
Implementation Method 1
These recombinant host cells utilize microbial fermentation from renewable feedstocks (for example, glucose) to produce glyceric acid
Implementation Method 2
The materials and methods described herein comprise a renewable and cheaper starting material and an environmentally-benign biosynthetic process
Data Source
AI summary
Methods and materials related to producing glyceric acid and downstream products are disclosed. Specifically, isolated nucleic acids. polypeptides, host cells, methods and materials for producing glycolic acid by direct fermentation from sugars are disclosed.