Recombinant Sesquiterpene Synthase for Patchoulol Production
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Solution Overview
Problem
Current methods for producing patchoulol and 7-epi-α-selinene, valuable compounds in perfumery, face challenges due to the variability and cost of natural plant extracts, and lack of cost-effective chemical synthesis, with existing sesquiterpene synthases only capable of producing one of these compounds, not both.
Innovation Solution
A polypeptide with a patchoulol and 7-epi-α-selinene synthase activity, having an amino acid sequence at least 70% identical to a specific sequence, is used to catalyze the production of both compounds from farnesyl pyrophosphate, either in vitro or in vivo, using a non-human host organism transformed with a nucleic acid encoding this sequence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If plant extracts are used as source of terpenes, then natural compounds are obtained, but availability and quality vary due to climate and local conditions
Solution Approach 1:
The patent uses recombinant sesquiterpene synthase enzymes as intermediaries to convert FPP into target sesquiterpenes. These enzymes are produced in heterologous host systems (E. coli, yeast, or plant cells), serving as a mediator between simple chemical substrate (FPP) and complex natural products, eliminating dependence on natural plant extraction while maintaining product quality and availability.
Solution Approach 2:
The patent creates recombinant copies of sesquiterpene synthase genes from various plant sources and expresses them in heterologous systems. This copying approach allows production of identical enzyme functions without needing the original plant materials, thereby ensuring consistent supply and quality independent of geographical or climatic factors.
2Productivity
If existing sesquiterpene synthases are used, then one specific compound is produced, but inability to produce multiple compounds limits versatility
Solution Approach 1:
The patent identifies and utilizes sesquiterpene synthase enzymes that exhibit multi-functionality, capable of producing multiple different sesquiterpene compounds from the same substrate FPP. By selecting enzymes with broad substrate acceptance and diverse product profiles, the system achieves versatility in producing patchoulol, 7-epi-α-selinene, and other sesquiterpenes using a single enzyme system.
Solution Approach 2:
The patent employs parameter changes including pH optimization, temperature control, and particularly metal ion supplementation (Mg2+, Mn2+, Ca2+) to modulate enzyme activity and product distribution. By adjusting these parameters, the same enzyme system can be tuned to favor production of different sesquiterpene compounds, thereby achieving versatility without requiring multiple specialized enzymes.
3Ease of manufacture
If chemical synthesis is used, then cost-effective production is achieved, but inability to produce both patchoulol and 7-epi-α-selinene simultaneously limits efficiency
Solution Approach 1:
The patent employs self-service principles where the recombinant enzyme system automatically catalyzes the conversion of FPP into multiple sesquiterpene products without requiring external intervention for each compound synthesis. The enzyme system naturally produces a mixture of compounds including both patchoulol and 7-epi-α-selinene in a single reaction, eliminating the need for separate synthesis pathways for each compound and thereby achieving both cost-effectiveness and multi-compound productivity.
4Reliability
If purification of individual constituents from valerian oil is attempted, then natural compounds are obtained, but large scale purification is not feasible
Solution Approach 1:
The patent takes out the essential functional component (sesquiterpene synthase enzyme) from the complex natural source (valerian plant) and transfers it to a simple heterologous expression system. This extraction approach isolates the productive capability while eliminating the need to process and purify from complex natural matrices, thereby achieving natural compound quality without large-scale purification complexity.
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 enables the efficient production of patchoulol and 7-epi-α-selinene as major products, with the polypeptide producing these compounds in high yields, overcoming the limitations of natural extract variability and cost, and providing a stable biochemical pathway for perfumery applications.
Implementation Method 1
A polypeptide with a patchoulol and 7-epi-α-selinene synthase activity is used to catalyze the production of both compounds from farnesyl pyrophosphate
Data Source
Figure 1A~1B
Figure 2A~2D
Figure 3
AI summary
The present invention provides a method of producing patchoulol and 7-epi-α-selinene, said method comprising contacting at least one polypeptide with farnesyl phyrophosphate (FPP). In particular, said method may be carried out in vitro or in vivo to produce patchoulol and 7-epi-α-selinene, compounds which can be useful in the field of perfumery. The present invention also provides the amino acid sequence of a polypeptide useful in the method of the invention. A nucleic acid encoding the polypeptide of the invention and an expression vector containing said nucleic acid are also part of the present invention. A non-human host organism or a cell transformed to be used in the method of producing patchoulol and 7-epi-α-selinene is also an object of the present invention.