Microbial Co-Production of 1,4-BDO and GBL via Metabolic Engineering
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Solution Overview
Problem
Current methods for producing 1,4-butanediol (14-BDO) and gamma-butyrolactone (GBL) rely on petrochemical precursors, leading to environmental concerns and high production costs, with no efficient microbial routes available for commercial-scale co-production of these chemicals.
Innovation Solution
Development of non-naturally occurring microbial organisms engineered with exogenous nucleic acids encoding enzymes for 14-BDO and GBL pathways, enabling their co-production through metabolic engineering and adaptive evolution, allowing for controlled biosynthesis of these chemicals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If petrochemical precursors are used to produce 1,4-butanediol and gamma-butyrolactone, then production efficiency and established industrial processes are maintained, but environmental impact increases and production costs are high
Solution Approach 1:
The patent replaces petrochemical mechanical/chemical synthesis processes with biological fermentation processes using engineered microorganisms. The mechanical/chemical Reppe synthesis is substituted with enzymatic pathways in microbes, achieving the same chemical transformations through biological systems, thereby reducing environmental impact while maintaining productivity
Solution Approach 2:
The patent changes the fundamental production parameters by shifting from high-temperature, high-pressure petrochemical processes to mild, ambient-condition microbial fermentation. This parameter change enables sustainable production with lower energy consumption and reduced environmental harm
2Adaptability or versatility
If separate production methods are used for 1,4-butanediol and gamma-butyrolactone, then each chemical can be produced independently, but production costs remain high and process complexity increases
Solution Approach 1:
The patent merges the production of 1,4-butanediol and gamma-butyrolactone into a single integrated microbial fermentation process. Engineered microorganisms simultaneously produce both chemicals from the same feedstock, reducing overall production costs and simplifying manufacturing while maintaining the ability to produce each chemical independently through pathway regulation
Solution Approach 2:
The patent creates a universal microbial production platform that can generate multiple valuable chemicals (1,4-BDO and GBL) from a single system. The engineered microorganism performs multiple functions: consuming the same carbon source to produce different products through regulated metabolic pathways, thereby reducing manufacturing complexity and cost
3Object-affected harmful factors
If microbial fermentation is used to produce 1,4-butanediol and gamma-butyrolactone, then environmental impact is reduced and production costs decrease, but no efficient microbial routes were previously available for commercial-scale production
Solution Approach 1:
The patent segments the complex biosynthetic pathways into discrete enzymatic steps, each catalyzed by specific enzymes (e.g., 1,4-butanediol dehydrogenase, gamma-butyrolactone dehydrogenase). This segmentation allows for modular genetic engineering, enabling reliable scaling from laboratory to commercial production by systematically optimizing each pathway component
Solution Approach 2:
The engineered microorganisms are designed to self-regulate their metabolic pathways, automatically producing 1,4-BDO and GBL in appropriate ratios based on available carbon sources and environmental conditions. This self-service capability ensures reliable commercial-scale production without requiring complex external control systems
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 enables stable and efficient co-production of 14-BDO and GBL, reducing production costs and environmental impact by utilizing microbial fermentation, and allows for regulation of the production ratio, facilitating easier separation and utilization of the co-products.
Implementation Method 1
comprising at least one exogenous nucleic acid encoding a 14-BDO pathway enzyme and at least one exogenous nucleic acid encoding a GBL pathway enzyme
Implementation Method 2
utilizing microbial fermentation
Data Source
AI summary
The invention provides non-naturally occurring microbial organisms comprising 1,4-butanediol (14-BDO) and gamma-butyrolactone (GBL) pathways comprising at least one exogenous nucleic acid encoding a 14-BDO and GBL pathway enzyme expressed in a sufficient amount to produce 14-BDO and GBL. The invention additionally provides methods of using such microbial organisms to produce 14-BDO and GBL.