Cannabinoid Synthase Chaperone Engineering
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Solution Overview
Problem
The expression of terminal cannabinoid synthases in recombinant organisms such as yeast and E. coli for producing cannabinoids like THC(A), CBD(A), and CBC(A) has been inefficient, with only small amounts synthesized despite extensive engineering, due to challenges in optimizing enzyme activity and host organism modifications.
Innovation Solution
The use of exogenous terminal cannabinoid synthases from the berberine bridge enzyme-like family, combined with specific chaperones and modifications to enhance solubility, stability, and expression in targeted cellular locations, along with overexpression of FAD-related enzymes and inhibition of proteases, to improve cannabinoid production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If terminal cannabinoid synthases are expressed in recombinant organisms, then cannabinoid production is achieved, but enzyme activity and product yield remain low
Solution Approach 1:
The patent introduces chaperone proteins as intermediary molecules that facilitate proper folding and stabilization of terminal cannabinoid synthases. These chaperones act as mediators between the recombinant host environment and the plant-derived synthases, enabling the enzymes to achieve proper conformation and maintain catalytic activity. This resolves the contradiction by providing molecular assistance that bridges the incompatibility between heterologous expression systems and plant enzyme functionality.
Solution Approach 2:
The patent employs amino acid modifications and mutations in the terminal synthase sequences to alter enzymatic parameters such as thermal stability, solubility, and catalytic efficiency. By systematically changing amino acid residues at specific positions, the invention optimizes enzyme performance in recombinant hosts, thereby improving both productivity and reliability simultaneously through rational protein engineering.
2Productivity
If extensive engineering is performed on host organism and protein, then expression levels improve, but only small amounts of product are synthesized
Solution Approach 1:
The patent performs preliminary optimization by pre-selecting and characterizing specific chaperone proteins and synthase variants before full-scale expression. The invention identifies and validates chaperone-synthase combinations in advance, and optimizes expression conditions preliminarily, so that when production is scaled up, the system is already configured for high efficiency. This preliminary preparation prevents wasted engineering efforts and directs resources toward truly productive optimizations.
Solution Approach 2:
The patent employs universal chaperone proteins that can assist multiple different terminal synthases from various plant species. These chaperones provide multi-functional support across different enzyme substrates and reaction conditions, reducing the need for separate optimization campaigns for each synthase variant. This universality simplifies the overall engineering complexity while maintaining high product synthesis amounts across different cannabinoid production pathways.
3Adaptability or versatility
If terminal synthases are expressed in recombinant hosts, then cannabinoid biosynthesis is enabled, but enzyme solubility and stability are poor
Solution Approach 1:
Chaperone proteins serve as intermediary molecules that bind to terminal synthases during and after translation, preventing aggregation and promoting proper folding. These chaperones create a protective environment that maintains enzyme solubility and stability in the recombinant host cytoplasm, enabling the synthases to remain functional despite the foreign expression environment. The chaperones essentially mediate the adaptation of plant enzymes to bacterial or yeast cellular conditions.
Solution Approach 2:
The patent modifies physical-chemical parameters of the enzymes through amino acid substitutions that enhance solubility and structural stability. Specific mutations are introduced to improve protein folding kinetics, increase thermal stability, and prevent aggregation. These parameter changes allow the enzymes to maintain their native-like functionality in heterologous expression systems, resolving the contradiction between expression capability and stability.
Data Source
AI summary
Provided herein are cells, enzymes, and methods for improved cannabinoid production.