Clostridium sp. JS66 Strain Hexanoic Acid Production
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Solution Overview
Problem
Current biotechnologies lack efficient microorganisms for producing hexanoic acid in high yields, particularly from carbon monoxide and carbon dioxide substrates, and struggle to reduce by-product acetic acid and ethanol production.
Innovation Solution
A novel Clostridium sp. strain, JS66, is developed, capable of producing hexanoic acid and other metabolites with 4 to 6 carbon atoms in high yields using carbon monoxide, carbon dioxide, and hydrogen as substrates, while minimizing by-product formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional microorganisms (Clostridium carboxidivorans and Clostridium ragsdalei) are used for hexanoic acid production, then hexanoic acid can be produced from carbon monoxide and carbon dioxide, but the production yield is low
Solution Approach 1:
The patent modifies metabolic parameters by overexpressing specific genes (phaC, phaJ, phaR) to alter the metabolic flux toward hexanoic acid production. This genetic parameter change enables the microorganism to convert carbon monoxide and carbon dioxide into hexanoic acid with significantly improved yield, transforming the metabolic pathway efficiency without changing the fundamental biological system
2Adaptability or versatility
If Clostridium tyrobutyricum is used for fermentation, then butyric acid and acetic acid can be produced, but xylose utilization rate is lower than glucose utilization rate and C6 compounds cannot be produced
Solution Approach 1:
The patent creates a microorganism with multi-functional metabolic capabilities that can utilize both carbon monoxide and carbon dioxide as substrates while producing hexanoic acid. The engineered strain integrates multiple metabolic pathways (Wood-Ljungdahl pathway for C1 substrate utilization and fatty acid synthesis pathway for C6 product formation), enabling it to perform functions that were previously separate in different microorganisms
3Productivity
If chemical processes are used for butyric acid production, then production efficiency is high, but environmental problems and consumer perception issues arise
Solution Approach 1:
The patent replaces chemical synthesis processes with a biological fermentation system using engineered microorganisms. Instead of using chemical catalysts and high-energy reactions for butyric acid and hexanoic acid production, the system uses biologically catalyzed metabolic pathways that operate under milder conditions, reducing environmental impact and improving consumer acceptance while maintaining production efficiency
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 Clostridium sp. JS66 strain achieves significant yields of hexanoic acid and other metabolites, outperforming conventional strains and reducing by-product production, thus providing an efficient and eco-friendly method for producing valuable chemicals and fixing greenhouse gases.
Implementation Method 1
Biological conversion methods that allow to consume both carbon monoxide and carbon dioxide utilize microorganisms using the Wood-Ljungdahl pathway
Data Source
AI summary
The present disclosure relates to a Clostridium sp. JS66 strain producing metabolites having 4 to 6 carbon atoms in a high yield. The strain produces metabolites having 6 carbon atoms in a significantly high yield while reducing the production of acetic acid and ethanol as by-products.