Isoprenyl Acetate Production via Engineered E. coli Metabolism

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Solution Overview

Problem

Current methods for producing isoprenyl acetate are inefficient and environmentally harmful, relying on petrochemical precursors and resulting in low yields and high toxicity, while also facing challenges in scalability and product separation.

Innovation Solution

A genetically modified E. coli strain is developed with an episomal expression of the IPP-bypass pathway and an alcohol acyltransferase, ATF1, to produce isoprenyl acetate through a mevalonate pathway, achieving high titer production and overcoming toxicity and scalability issues by using glucose as a carbon source.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If petrochemical precursors are used to produce isoprenyl acetate, then current production methods can be implemented, but the process results in low yields and high toxicity

Engineering Contradiction:

ImproveyieldVSAvoidtoxicity

Core Design Contradiction:

ProductivityVSObject-generated harmful factors

Solution Approach 1:

The patent converts the harmful petrochemical production process into a beneficial biological process by using genetically modified E. coli cells that metabolize glucose through the mevalonate pathway to produce isoprenyl acetate. This transforms a toxic, low-yield chemical synthesis into a clean, high-yield biological production method, eliminating harmful factors while improving productivity

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Solution Approach 2:

The patent changes the fundamental parameters of the production process from chemical synthesis to biological metabolism. By altering the production mechanism from petrochemical reactions to enzymatic pathways in living cells, the process achieves higher yields and eliminates toxicity associated with petrochemical precursors and intermediates

Inventive Principle:

Principle #35Parameter changes

2Productivity

If current production methods are used, then isoprenyl acetate can be produced, but scalability and product separation are challenging

Engineering Contradiction:

ImprovescalabilityVSAvoidproduct separation

Core Design Contradiction:

ProductivityVSEase of manufacture

Solution Approach 1:

The engineered E. coli cells perform self-service by automatically producing isoprenyl acetate through their metabolic pathways and selectively secreting it into the culture medium. This self-secretion mechanism simplifies product separation, as the compound is readily available in the aqueous phase without requiring complex extraction processes, thereby improving scalability

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent uses the cell membrane and secretion systems as intermediaries to facilitate the transfer of isoprenyl acetate from the intracellular metabolic pathway to the extracellular environment. This intermediary mechanism enables efficient product separation and simplifies the overall manufacturing process, making scalability feasible

Inventive Principle:

Principle #24Intermediary (Mediator)

3Productivity

If petrochemical methods are used, then production can proceed, but environmental harm is significant

Engineering Contradiction:

Improveproduction efficiencyVSAvoidenvironmental harm

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent converts the environmentally harmful petrochemical process into a sustainable biological process. By using renewable glucose feedstock and enzymatic metabolism, the system eliminates the environmental harm associated with petrochemical extraction and synthesis while maintaining high production efficiency through optimized metabolic pathways

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Solution Approach 2:

The patent replaces the mechanical/chemical production system with a biological system. By substituting petrochemical synthesis with cellular metabolism, the process achieves production efficiency while eliminating the environmental harm inherent in fossil fuel-based chemistry, aligning with sustainable manufacturing principles

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 method achieves significantly higher yields of isoprenyl acetate, reducing environmental harm and improving scalability, with the potential for further modifications to produce other olefinic esters, and demonstrates efficient conversion to valuable compounds like 1,4-dimethylcyclooctane.

Implementation Method 1

an alcohol acyltransferase, ATF1, to produce isoprenyl acetate through a mevalonate pathway

Methodology Applied

Scientific EffectEnzyme catalysis: Enzyme

Implementation Method 2

through a mevalonate pathway

Methodology Applied

Scientific EffectMetabolic pathway: Fermentation

Implementation Method 3

using glucose as a carbon source

Methodology Applied

Scientific EffectCellular respiration: Fermentation

Data Source

PatentUS20240344094A1Methods and compositions useful for the production of olefinic ester

Publication Date: 2024.10.17 RGT UNIV OF CALIFORNIA

AI summary

The present invention provides for a method for producing an olefinic ester, the method comprising: (a) providing a host cell capable of producing olefinic ester; and (b) culturing the host cell to produce olefinic ester. In some embodiments, the olefinic ester is isoprenyl acetate. In some embodiments, the olefinic ester is isoprenyl acetate, and the method further comprises: (c) optionally recovering the isoprenyl acetate; (d) optionally (i) deacetylating the isoprenyl acetate into isoprene, and/or (ii) hydrolyzing isoprenyl acetate into isoprenol and dehydrating the isoprenol into isoprene; and, (e) optionally converting the isoprene into 1,4-dimethylcyclooctane (DMCO).