Engineered Cells With Membrane Transporters for Melatonin Production
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Solution Overview
Problem
Current methods for producing melatonin and 5HTP are costly and inefficient, relying heavily on chemical synthesis or plant extraction, with a need for biologically engineered cells that can effectively transport and produce these compounds.
Innovation Solution
Genetically modified recombinant cells overexpressing integral membrane proteins such as YhjV, GarP, ArgO, AcrAB, and LysP to enhance the export and import of indole-derivatives like melatonin and 5HTP, utilizing biosynthetic pathways involving enzymes like L-tryptophan hydroxylase and 5HTP decarboxylase.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If chemical synthesis or plant extraction is used for producing melatonin and 5HTP, then production can be achieved, but the process is costly and inefficient
Solution Approach 1:
The patent replaces chemical synthesis methods with biological production systems using recombinant cells. The cells are engineered to express biosynthetic pathways for melatonin and 5HTP production, substituting chemical processes with enzymatic reactions catalyzed by expressed proteins, thereby reducing production costs and improving efficiency
Solution Approach 2:
The recombinant cells are designed to autonomously produce melatonin and 5HTP through engineered biosynthetic pathways. The cells utilize their own metabolic machinery and imported substrates to synthesize the compounds, eliminating the need for external chemical synthesis processes and reducing overall production costs
2Productivity
If recombinant cells are engineered to produce melatonin and 5HTP, then natural production is achieved, but transporters must be engineered to improve export and reduce toxicity
Solution Approach 1:
The patent extracts and removes toxic indole-derivatives from the cellular interior through engineered transporter proteins. These transporters actively pump melatonin, 5HTP, and other indole compounds from the cytoplasm across the cell membrane into the extracellular environment, thereby reducing intracellular toxicity while maintaining production levels
Solution Approach 2:
The transporter proteins serve as intermediary molecules that facilitate the controlled movement of indole-derivatives between the cell interior and exterior. These membrane proteins mediate the export process, allowing the cell to maintain high production levels while managing toxicity through regulated transport
3Productivity
If transporters are overexpressed to improve export of indole-derivatives, then production and tolerance increase, but device complexity increases
Solution Approach 1:
The patent merges multiple functions into the transporter protein expression system. The same overexpressed transporter proteins simultaneously achieve multiple objectives: exporting toxic compounds, maintaining cellular homeostasis, and enabling scalable production. This consolidation reduces the need for separate genetic modifications for each function
Solution Approach 2:
The engineered transporter proteins perform multiple functions within the recombinant cell system. They serve as export mechanisms for various indole-derivatives, contribute to cellular tolerance, and enable product recovery. This multi-functionality reduces the overall complexity compared to having separate systems for each purpose
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 overexpression of these transporters increases production and tolerance to indole-derivatives, improving fermentation yields and reducing toxicity, thereby enhancing the efficiency and cost-effectiveness of melatonin and 5HTP production.
Implementation Method 1
Transporters are responsible for cellular exchange of both small molecules and macromolecules
Implementation Method 2
L-tryptophan hydroxylase; (b) an L-tryptophan hydroxylase and a 5HTP decarboxylase
Data Source
AI summary
Integral membrane proteins capable of transporting melatonin and other indole-derivatives across biological membranes, and uses thereof.