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A Customizable Approach for the Enzymatic Production and Purification of Diterpenoid Natural Products

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Published on: October 4, 2019

Psilocybin biosynthesis enhancement through gene source optimization.

Madeleine R Keller¹, Madeline G McKinney¹, Abhishek K Sen¹

¹Miami University, Department of Chemical, Paper, and Biomedical Engineering, Oxford, OH, USA.

Metabolic Engineering

|April 18, 2025

Summary

This summary is machine-generated.

This study enhanced psilocybin biosynthesis by exploring gene variations from different mushroom species. A novel strain achieved the highest reported psilocybin production, paving the way for scalable manufacturing.

Keywords:

Baeocystin Gene source optimization Gymnopilus dilepis Norbaeocystin methyltransferase Promoter library PsiM Psilocybe cubensis Psilocybin

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Area of Science:

Biotechnology
Mycology
Biochemistry

Background:

Psilocybin is being investigated for mental health treatments.
Previous psilocybin biosynthesis studies in E. coli yielded limited results.
Gene source variation in psilocybin biosynthesis is underexplored.

Purpose of the Study:

To investigate the impact of gene species variation on psilocybin and baeocystin production.
To identify optimal gene sources for enhanced psilocybin biosynthesis.
To improve the efficiency of microbial psilocybin production.

Main Methods:

Expressed exogenous genes from four psilocybin-producing mushroom species (Psilocybe cubensis, Psilocybe cyanescens, Panaeolus cyanescens, Gymnopilus dilepis) in E. coli.
Quantified psilocybin and baeocystin titers.
Performed comparative proteomic analysis to identify metabolic bottlenecks.

Main Results:

Psilocybe cubensis psiD and psiK genes showed superior performance.
Psilocybe cyanescens psiM gene demonstrated higher baeocystin selectivity.
A novel strain (Gymdi30) with a Gymnopilus dilepis psiM gene achieved a record psilocybin titer of 1.46 g/L.

Conclusions:

Gene source variation significantly impacts psilocybin and baeocystin production.
The Gymdi30 strain represents a significant advancement in psilocybin biosynthesis.
This work is crucial for developing a scalable biosynthetic manufacturing route for psilocybin.