Oxygenated Terpene Biosynthesis Using Engineered SrKO Oxidation
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Solution Overview
Problem
Existing methods for producing oxygenated sesquiterpenes like nootkatone are inefficient and costly due to the high price of starting materials and tedious extraction processes, necessitating the development of sustainable and commercially feasible biosynthesis methods.
Innovation Solution
Utilizing engineered Stevia rebaudiana Kaurene Oxidase (SrKO) enzymes or derivatives with specific mutations to catalyze the oxidation of sesquiterpene substrates, such as valencene, into oxygenated products like nootkatol and nootkatone, in both ex vivo and in vivo systems, including microbial hosts like E. coli and yeast.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional oxidation methods using valencene are used, then nootkatone can be produced, but the starting material cost is high and the process is not commercially feasible
Solution Approach 1:
The patent changes the substrate parameter from valencene to alternative sesquiterpenes like germacrene A, farnesene, and epi-farnesene, which are more readily available and cost-effective. This parameter substitution maintains product output while improving manufacturing feasibility
Solution Approach 2:
The patent employs inexpensive, readily available sesquiterpene substrates instead of expensive valencene. These alternative substrates serve as disposable starting materials that can be obtained from common plant sources, reducing the overall manufacturing cost structure
2Quantity of substance
If plant extraction methods are used, then terpene products can be obtained, but the extraction processes are tedious and inefficient for industrial scale production
Solution Approach 1:
The patent replaces mechanical extraction processes with enzymatic oxidation catalysis. Instead of using tedious extraction methods to obtain terpenes from plants, the invention uses engineered enzyme systems to directly convert readily available sesquiterpene substrates into oxygenated products through biochemical reactions
Solution Approach 2:
The patent employs whole-cell biocatalysts that contain all necessary enzymatic machinery within the cell structure. The cells themselves provide the catalytic environment and cofactors needed for oxidation, eliminating the need for separate extraction and purification steps
3Quantity of substance
If traditional biosynthesis pathways are engineered, then terpenoid products can be produced, but the pathways require complex engineering of MEP or MVA pathways
Solution Approach 1:
The patent introduces sesquiterpene substrates directly into the system, bypassing the need to engineer complete biosynthetic pathways from scratch. The substrates are provided exogenously or through simple precursor pathways, and the focus is placed on implementing only the final oxidation step rather than engineering entire MEP or MVA pathways
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 the production of unique oxygenated sesquiterpene profiles with enhanced yields and sensory characteristics, overcoming the limitations of traditional methods by providing a cost-effective and sustainable biosynthesis pathway.
Implementation Method 1
contacting the sesquiterpene with Stevia rebaudiana Kaurene Oxidase (SrKO) or a derivative thereof having sesquiterpene oxidizing activity
Implementation Method 2
engineered Stevia rebaudiana Kaurene Oxidase (SrKO) enzymes or derivatives with specific mutations to catalyze the oxidation of sesquiterpene substrates
Data Source
AI summary
The present disclosure relates to methods for producing oxygenated terpenoids, and preparation of compositions and formulations thereof. Polynucleotides, derivative enzymes, and host cells for use in such methods are also provided.