Fatty Acid Ester Production via Genetically Engineered Microorganisms
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Solution Overview
Problem
Current methods for producing fatty acid esters are inefficient, generate significant by-products, and lack specificity, particularly for methyl laurate production, with environmental concerns associated with petroleum-based extraction and low yields from biofuels.
Innovation Solution
Genetically engineered microorganisms are used to produce fatty acid esters by modifying them to enhance fatty acid and acyl-CoA production through specific enzymatic pathways and increasing wax ester synthase activity, allowing for efficient and specific production of fatty acid esters like methyl laurate in the presence of exogenous alcohols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If petroleum extraction and cracking methods are used to produce fatty acid esters, then production capacity is sufficient, but environmental damage increases and production costs increase due to energy consumption and petroleum price linkage
Solution Approach 1:
The invention changes the fundamental parameter of raw material source from petroleum-based to microorganism-based production. By genetically engineering microorganisms to produce fatty acid esters, the process eliminates the need for petroleum extraction and cracking, thereby reducing environmental damage while maintaining production capacity through controlled biological synthesis
Solution Approach 2:
The invention replaces the mechanical/chemical cracking process with a biological synthesis process. Instead of using high-energy mechanical cracking to break down long chain hydrocarbons, the patent uses genetically engineered microorganisms to biosynthesize fatty acid esters through metabolic pathways, substituting a biological system for a mechanical/chemical one
2Adaptability or versatility
If conventional biofuel methods are used to produce fatty acid esters, then renewable sourcing is achieved, but production yield remains low
Solution Approach 1:
The invention segments the fatty acid ester production pathway into distinct genetic components that can be independently optimized. By introducing specific genes for fatty acid synthesis and wax ester synthase activity, the patent creates a modular biological system where each component contributes to the overall yield, allowing for targeted improvement of production efficiency while maintaining renewable sourcing
Solution Approach 2:
The invention creates a composite biological system by combining multiple genetic elements within the microorganism. The engineered microorganism integrates fatty acid synthesis pathways with wax ester synthase expression, creating a composite cellular system that produces fatty acid esters with high yield while maintaining the renewable characteristic of biological production
3Ease of manufacture
If current fatty acid ester production methods are used, then basic production capability is maintained, but specificity for particular esters like methyl laurate is poor and by-product generation is high
Solution Approach 1:
The invention applies local quality by introducing specific genetic modifications at particular locations in the metabolic pathway. By expressing specific wax ester synthase genes and modifying particular enzymatic steps in fatty acid synthesis, the patent achieves high specificity for methyl laurate production while maintaining overall production capability, reducing unwanted by-products through targeted genetic engineering
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 approach significantly increases the yield and specificity of fatty acid ester production, reducing environmental impact and operational costs compared to traditional methods, while minimizing by-product generation.
Implementation Method 1
Fatty acid esters are known to be the product of a condensation reaction between an acyl-CoA molecule and an alcohol of any chain length sometimes in the presence of wax ester synthases
Implementation Method 2
Fatty acid esters are known to be the product of a condensation reaction between an acyl-CoA molecule and an alcohol
Data Source
AI summary
A microbial cell is used for producing at least one fatty acid ester, wherein the cell is genetically modified to contain (i) at least one first genetic mutation that enables the cell to produce at least one fatty acid and/or acyl coenzyme A (CoA) thereof by increased enzymatic activity in the cell relative to the wild type cell of malonyl-CoA dependent and malonyl-ACP independent fatty acyl-CoA metabolic pathway, wherein the fatty acid contains at least 5 carbon atoms; and (ii) a second genetic mutation that increases the activity of at least one wax ester synthase in the cell relative to the wild type cell and the wax ester synthase has sequence identity of at least 50% to a polypeptide of SEQ ID NO: 1-8 and combinations thereof or to a functional fragment of any of the polypeptides for catalyzing the conversion of fatty acid and/or acyl coenzyme A thereof to the fatty acid ester.