Microbial deracemization of alpha-substituted carboxylic acids

Area of Science:

• Biocatalysis and Enzyme Engineering
• Organic Chemistry
• Microbial Biotechnology

Background:

• Chiral molecules are crucial in pharmaceuticals and agrochemicals.
• Existing methods for chiral compound synthesis can be complex and costly.
• Deracemization offers an efficient route to enantiomerically pure compounds.

Purpose of the Study:

• To identify and characterize a novel enzyme system capable of chiral inversion.
• To explore the substrate scope of this enzyme system for deracemization reactions.
• To establish a new biocatalytic method for producing chiral carboxylic acids.

Main Methods:

• Isolation and cultivation of Nocardia diaphanozonaria JCM 3208.
• Enzyme extraction and purification.
• Enzymatic assays using various alpha-substituted carboxylic acids (e.g., 2-phenylpropanoic acid derivatives).
• Chiral analysis of reaction products.

Main Results:

• Nocardia diaphanozonaria JCM 3208 possesses an enzyme system that catalyzes chiral inversion.
• The enzyme system successfully deracemized various alpha-substituted carboxylic acids, including 2-phenylpropanoic acid and 2-phenoxypropanoic acid derivatives.
• A novel deracemization pathway was elucidated.

Conclusions:

• The identified enzyme system provides a novel biocatalytic approach for deracemization.
• This method offers an efficient route to enantiomerically pure alpha-substituted carboxylic acids.
• Potential applications in asymmetric synthesis and pharmaceutical development.