Bioengineered Isoprene Synthase for Renewable Polymer Production
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Solution Overview
Problem
The high cost and energy intensity of producing isoprene from petrochemical sources, coupled with concerns over future supply adequacy and price increases, necessitate the development of a low-cost, renewable, and environmentally friendly source for isoprene production.
Innovation Solution
Cells are engineered to produce isoprene by introducing a heterologous nucleic acid encoding an isoprene synthase polypeptide, which converts dimethylallyl diphosphate into isoprene, using renewable carbon sources and optimized fermentation conditions to enhance yield and efficiency, allowing for the production of isoprene that can be polymerized into synthetic rubbers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If isoprene is produced from petrochemical sources through thermal cracking, then isoprene can be obtained for industrial use, but the process is energy-intensive and costly with limited future supply
Solution Approach 1:
The patent changes the fundamental production parameter from petrochemical thermal cracking to biological fermentation processes. Microorganisms are engineered to produce isoprene through metabolic pathways using renewable carbon sources, fundamentally altering the production method from high-energy thermal processes to lower-energy biological processes that can be sustained long-term
Solution Approach 2:
The patent replaces the mechanical/thermal cracking system with a biological system. Instead of using high-temperature thermal cracking of petroleum feedstocks, the invention employs genetically modified microorganisms that biosynthesize isoprene through enzymatic pathways, substituting a mechanical energy-intensive process with a biological system
2Quantity of substance
If isoprene is produced from petrochemical sources, then current production needs are met, but future supply adequacy is concerning and prices are expected to rise
Solution Approach 1:
The patent makes the production system universal by using renewable carbon sources that can be derived from multiple feedstocks (agricultural crops, forestry residues, waste materials). This multi-functionality ensures that isoprene production is not dependent on a single depleting resource (petroleum) but can adapt to various renewable sources, ensuring long-term supply reliability
Solution Approach 2:
The biological production system is designed to be self-sustaining using renewable resources. Microorganisms naturally metabolize carbon sources to produce isoprene, creating a self-service production system that does not deplete finite resources and can be maintained indefinitely unlike petrochemical extraction
3Ease of manufacture
If traditional petrochemical processes are used for isoprene production, then established production methods are maintained, but the process is environmentally unfriendly and costly
Solution Approach 1:
The patent converts potentially harmful waste carbon sources into beneficial isoprene product. By engineering microorganisms to metabolize renewable carbon sources (including agricultural waste and other biomass) into isoprene, the process transforms what would be waste or low-value materials into high-value chemical feedstock, while simultaneously reducing environmental impact compared to petroleum extraction and cracking
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 method provides a high-yield, low-energy, and cost-effective means of producing isoprene from renewable sources, offering a sustainable alternative to petrochemical-based production and enabling the creation of verifiable, environmentally friendly synthetic rubbers.
Implementation Method 1
introducing a heterologous nucleic acid encoding an isoprene synthase polypeptide, which converts dimethylallyl diphosphate into isoprene
Implementation Method 2
These cells are cultured in a culture medium that includes a carbon source, such as, but not limited to, a carbohydrate, glycerol, glycerine, dihydroxyacetone, one-carbon source, oil, animal fat, animal oil, fatty acid, lipid, phospholipid, glycerolipid, monoglyceride, diglyceride, triglyceride, renewable carbon source
Data Source
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AI summary
It has been found that certain cells in culture can convert carbon available in the cell culture medium into isoprene These cells have a heterologous nucleic acid which is operably linked to a promoter and encodes an isoprene synthase polypeptide The isoprene produced in such a cultured medium can then be recovered and polymenzed into synthetic rubbers and other useful polymepc matenals The synthetic isoprene containing polymers of this invention offer the benefit of being verifiable as to being denved from non- petrochemical based resources They can also be analytically distinguished from rubbers that come from natural sources The present invention more specifically discloses a polyisoprene polymer which is comprised of repeat units that are denved from isoprene monomer, wherein the polyisoprene polymer has delta 13C value of greater than -22%o This type of polyisoprene can be a as-1 A- polyisoprene homopolymer rubber.