Aldehyde Dehydrogenase Variants for Renewable Diol Production
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Solution Overview
Problem
Current methods for producing commodity chemicals like 1,3-butanediol and 1,4-butanediol rely on petroleum-based sources, which are energy-intensive and capital-intensive, and do not provide renewable alternatives.
Innovation Solution
Development of aldehyde dehydrogenase variants and engineered cells that facilitate the production of 3-hydroxybutyraldehyde and related compounds, enabling the biosynthesis of 1,3-butanediol and 1,4-butanediol through metabolic pathways.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If petroleum-based methods are used to produce commodity chemicals, then production capability is achieved, but energy consumption and capital intensity increase
Solution Approach 1:
The patent changes the fundamental parameter of production source from petroleum-based to renewable biological sources. By engineering microbial cells to express aldehyde dehydrogenase variants, the process transforms renewable feedstocks (sugars, starches, cellulose) into commodity chemicals through metabolic pathways, thereby reducing energy consumption and capital intensity compared to traditional petroleum-based methods
Solution Approach 2:
The patent replaces mechanical/chemical processing systems with biological systems. Instead of using petroleum refining and chemical synthesis, the invention employs engineered microbial cells that perform catalytic conversions through enzymatic reactions, substituting high-energy mechanical/chemical processes with lower-energy biological transformations
2Productivity
If petroleum-based methods are used to produce commodity chemicals, then production capability is achieved, but capital intensity increases
Solution Approach 1:
The patent replaces complex mechanical and chemical processing infrastructure with simpler biological systems. By using engineered microbial cells that can be grown in standard bioreactors, the process eliminates the need for expensive petroleum refining equipment and complex chemical synthesis facilities, thereby reducing capital intensity
Solution Approach 2:
The patent changes the production paradigm from capital-intensive petroleum refining to biologically-based chemical synthesis. By utilizing renewable feedstocks that can be produced through agriculture and converting them via engineered microbial metabolism, the process achieves production capability with significantly reduced capital requirements
3Productivity
If conventional aldehyde dehydrogenase is used, then basic catalytic function is achieved, but substrate specificity and enantiomer selectivity are insufficient
Solution Approach 1:
The patent applies local quality by making specific targeted mutations at critical positions in the aldehyde dehydrogenase enzyme structure. By modifying specific amino acid residues at positions such as 124, 125, 126, 127, and 128, the enzyme achieves enhanced substrate specificity and enantiomer selectivity while maintaining its catalytic function, rather than attempting to redesign the entire enzyme
Solution Approach 2:
The patent introduces dynamics by creating enzyme variants with adjustable substrate specificity. Through rational design and directed evolution, the aldehyde dehydrogenase enzyme can be optimized for different substrates and reaction conditions, allowing the same enzyme family to adapt to various chemical transformations requirements
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 provides a renewable and less energy-intensive method for producing these chemicals, enhancing sustainability and reducing production costs by utilizing engineered microbial organisms to convert acyl-CoA compounds into their corresponding aldehydes and diols.
Implementation Method 1
aldehyde dehydrogenase variants... convert acyl-CoA compounds into their corresponding aldehydes
Implementation Method 2
engineered enzymes that facilitate production of a desired product... aldehyde dehydrogenase variants
Implementation Method 3
processes for producing commodity chemicals... utilizing engineered microbial organisms to convert acyl-CoA compounds
Data Source
AI summary
The invention provides polypeptides and encoding nucleic acids of aldehyde dehydrogenase variants. The invention also provides cells expressing aldehyde dehydrogenase variants. The invention further provides methods for producing 3-hydroxybutyraldehyde (3-HBal) and/or 1,3-butanediol (1,3-BDO), or an ester or amide thereof, comprising culturing cells expressing an aldehyde dehydrogenase variant or using lysates of such cells. The invention additional provides methods for producing 4-hydroxybutyraldehyde (4-HBal) and/or 1,4-butanediol (1,4-BDO), or an ester or amide thereof, comprising culturing cells expressing an aldehyde dehydrogenase variant or using lysates of such cells.