Artificial Alkane Oxidation System for Terpene Allylic Oxidation
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Solution Overview
Problem
Current methods lack a viable biosynthetic pathway for producing terpene-based aldehyde and alcohol products, specifically sinensal, due to the absence of known oxidative enzymes that can perform allylic oxidation of farnesene, limiting the fermentative production of these compounds.
Innovation Solution
An artificial alkane oxidation system comprising an oxidase enzyme with a specific amino acid sequence identity, along with terpene synthase protein and electron transfer compounds, is developed to facilitate the oxidation of alkanes and terpenes, enabling the production of oxidized terpene products like sinensal through fermentation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If chemical synthesis routes are used to produce terpene-based aldehydes like sinensal, then the production capability is achieved, but the compounds are categorised separately from naturally produced compounds and lose the 'natural' label and price advantage
Solution Approach 1:
The patent replaces chemical synthesis methods with a biosynthetic pathway using engineered microbial cells. The mechanical/chemical synthesis system is substituted with a biological system that uses enzymatic reactions (monooxygenase and alcohol dehydrogenase) to convert farnesene to sinensal, thereby producing compounds that are categorised as naturally produced and retain the natural label and price advantage.
2Object-generated harmful factors
If biosynthetic pathways are used for terpene production, then the natural label and price advantage are maintained, but no viable biosynthetic pathway exists for producing terpene-based aldehydes like sinensal due to absence of known oxidative enzymes
Solution Approach 1:
The patent divides the biosynthetic pathway into discrete enzymatic steps: first, a monooxygenase enzyme performs allylic oxidation of farnesene to produce an intermediate alcohol, then an alcohol dehydrogenase enzyme converts the alcohol to the final aldehyde product (sinensal). This segmentation of the biosynthetic pathway into manageable enzymatic steps makes the manufacture viable by identifying and engineering specific enzyme functions rather than attempting a single-step conversion.
Solution Approach 2:
The patent introduces an intermediary compound (allylic alcohol) in the biosynthetic pathway from farnesene to sinensal. The monooxygenase enzyme produces this intermediate, which then serves as substrate for the alcohol dehydrogenase to generate the final aldehyde product. This intermediary approach enables the two-step biosynthetic pathway to overcome the absence of direct oxidative enzymes.
3Reliability
If no monooxygenase or oxidative enzyme is available for allylic oxidation of farnesene, then the specific oxidation reaction cannot be performed, but this limitation prevents the development of a complete biosynthetic pathway to sinensal
Solution Approach 1:
The patent changes the parameter of enzyme availability by identifying and characterizing monooxygenase enzymes from Pseudomonas sp. that are capable of performing allylic oxidation of farnesene. By discovering and engineering these specific enzymes with the required catalytic parameters, the patent enables the biosynthetic pathway while maintaining reaction specificity.
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
The system successfully achieves the fermentative production of terpene-based aldehyde and alcohol products, including sinensal, by providing a novel combination of enzymes and conditions that mimic natural oxidative processes, overcoming the limitations of existing synthetic and biosynthetic methods.
Implementation Method 1
an artificial alkane oxidation system... facilitate the oxidation of alkanes and terpenes, enabling the production of oxidized terpene products
Implementation Method 2
an artificial alkane oxidation system comprising an oxidase enzyme with a specific amino acid sequence identity, along with terpene synthase protein
Implementation Method 3
electron transfer compounds, is developed to facilitate the oxidation of alkanes and terpenes
Implementation Method 4
enabling the production of oxidized terpene products like sinensal through fermentation
Data Source
AI summary
An artificial alkane oxidation system comprising components: a. an oxidase enzyme; and b. one or more enzymes to provide one or more alkanes. The artificial alkane oxidation system optionally has c. an electron transfer compound suitable to transfer at least one electron to the oxidase enzyme; and further optionally has d. an electron transfer compound regeneration enzyme suitable to reduce the electron transfer compound of c. when it is in its oxidized state. The oxidase enzyme is an amino acid sequence with a sequence identity of at least 70% with any one of SEQ ID NO: 1, 10, 11, 23 to 43 or a fragment thereof or a variant thereof.