Acyltransferase Enzyme Control for Medium-Chain Fatty Acid Production
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for enhancing fatty acid and lipid productivity in plants and algae are limited in controlling the chain length of fatty acids, particularly for medium-chain fatty acids, which are crucial for specific industrial applications such as biodiesel and surfactants.
Innovation Solution
Identification and enhancement of an acyltransferase enzyme from the algae genus Nannochloropsis, specifically the NoAT protein, which improves the production of medium-chain fatty acids and total lipid productivity by modifying the fatty acid synthesis pathway.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional methods are used to enhance fatty acid and lipid productivity in plants and algae, then total lipid productivity is improved, but control over the chain length of fatty acids (particularly medium-chain fatty acids) is limited
Solution Approach 1:
The patent applies local quality by specifically targeting and enhancing the activity of acyltransferase enzymes at particular positions (sn-1 and sn-2) on the glycerol backbone. By using position-specific acyltransferases (psATs) that preferentially acylate specific hydroxyl groups, the method achieves localized control over fatty acid incorporation, thereby controlling chain length distribution while maintaining high overall lipid productivity.
Solution Approach 2:
The patent employs parameter changes by modifying the acyltransferase enzyme system to alter substrate specificity. By introducing or enhancing acyltransferases with specific chain length preferences (e.g., preferring medium-chain fatty acids with 6-12 carbons), the method changes the parameter of fatty acid chain length distribution while simultaneously maintaining or enhancing total lipid productivity through optimized enzymatic activity.
2Productivity
If acyltransferase activity is enhanced to improve medium-chain fatty acid production, then productivity of medium-chain fatty acids increases, but the complexity of the enzymatic system increases
Solution Approach 1:
The patent applies universality by using acyltransferase enzymes that can handle multiple substrates (different fatty acid chain lengths) while maintaining preference for medium-chain fatty acids. The position-specific acyltransferases can acylate both saturated and unsaturated fatty acids at their preferred positions, reducing the need for separate specialized enzymes and thereby managing system complexity while achieving high medium-chain fatty acid productivity.
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
Significantly increases the productivity of medium-chain fatty acids and total lipids, allowing for the efficient production of lipids with specific carbon chain lengths, enhancing their suitability for industrial uses like biodiesel and surfactants.
Implementation Method 1
bonding of an acyl group by a glycerol-3-phosphate acyltransferase (hereinafter, also referred to as 'GPAT') is caused in the sn-1 position of glycerol-3-phosphate (hereinafter, also referred to as 'G3P'), and thus a lysophosphatidic acid (hereinafter, also referred to as 'LPA') is produced
Implementation Method 2
dephosphorylation is caused by a phosphatidic acid phosphatase (hereinafter, also referred to as 'PAP'), and thus diacylglycerol (hereinafter, also referred to as 'DAG') is produced
Data Source
AI summary
A method of producing lipids, containing the steps of:culturing a transformant in which the expression of a gene encoding the following protein (A) or (B) is enhanced, andproducing fatty acids or lipids containing these fatty acids as components:(A) a protein consisting of the amino acid sequence set forth in SEQ ID NO: 1; and(B) a protein consisting of an amino acid sequence having 44% or more identity with the amino acid sequence of the protein (A), and having acyltransferase activity.