Alpha-Dioxygenase Gene for Odd-Chain Aldehyde Synthesis
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current microbial synthesis systems for medium chain aliphatic aldehydes and hydrocarbons are limited by the requirement for reducing power and energy, and they produce alcohols with only even chain lengths and hydrocarbons with mostly odd chain lengths, which do not match the structural diversity of petroleum-based fuels.
Innovation Solution
A gene encoding α-dioxygenase is used to convert precursor fatty acids to aliphatic aldehydes through an oxidation reaction, reducing the burden on cellular resources and enabling the production of odd and even chain length aliphatic alcohols and hydrocarbons, respectively, by integrating the gene into E. coli strains with specific plasmids and enzymes like thioesterase and aldehyde reductase or decarbonylase.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If reductase is used for aldehyde reaction in reduction type hydrocarbon synthesis systems, then aliphatic alcohols and hydrocarbons can be synthesized, but additional reducing power (NAD(P)H) and energy (ATP) are required from cells, increasing the burden on cellular resources
Solution Approach 1:
The patent employs α-dioxygenase to catalyze the oxidation of fatty acids to aliphatic aldehydes, using molecular oxygen as the oxidant. This oxidation-type synthesis system eliminates the need for NAD(P)H and ATP consumption, thereby resolving the technical contradiction by providing a energetically favorable pathway that does not burden cellular resources while maintaining high productivity in hydrocarbon synthesis
2Productivity
If reduction type synthesis systems are used, then aliphatic alcohols with even chain lengths and hydrocarbons with odd chain lengths are produced, but the product chain length diversity does not match the structural diversity of petroleum-based fuels
Solution Approach 1:
By using α-dioxygenase for oxidation of fatty acids, the system produces aldehydes that can be converted to both even and odd chain length alcohols and hydrocarbons, achieving product diversity that matches petroleum-based fuel structures while maintaining synthesis efficiency
Solution Approach 2:
The patent changes the reaction type from reduction to oxidation, which fundamentally alters the product distribution to include both even and odd chain lengths, thereby improving adaptability to match petroleum-based fuel diversity without sacrificing 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
This approach allows for the production of bio-based chemicals and biofuels with chain lengths that match petroleum-based products, improving the efficiency and versatility of microbial synthesis by eliminating the need for additional reducing power and energy and achieving a broader range of chain lengths.
Implementation Method 1
A gene encoding α-dioxygenase is used to convert precursor fatty acids to aliphatic aldehydes through an oxidation reaction
Data Source
AI summary
Provided are genes, coding proteins and uses thereof, gene elements, genes and uses, gene elements, methods for synthesizing odd numbered medium chain aliphatic aldehydes, for synthesizing odd numbered medium chain aliphatic alcohol and for synthesizing even numbered medium chain aliphatic hydrocarbons. Provided is method for producing odd numbered aliphatic alcohols in Escherichia coli. An α-dioxygenase from rice is used without additional deoxidization and energy supply from cells. The α-dioxygenase can also be used for synthesizing aliphatic alcohols with different proportions of C11 to C15 by co-working with different thioesterases.