Halohydrin dehalogenase mutant and application thereof in biosynthesis

Highly active and highly stereoselective halohydrin dehalogenase mutants were prepared by gene mutation technology. As a biological catalyst, the kinetic splitting reaction was catalyzed, solving the problem of difficulty in synthesizing chiral 3-hydroxy-3-hydroxymethyl indole and spiroethylene oxide indole indole in the prior art, and achieving efficient and mild synthesis.

CN119752840APending Publication Date: 2025-04-04ZUNYI MEDICAL UNIVERSITY
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Patent Information

Application Number
CN202411892362.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-20
Publication Date
2025-04-04

AI Technical Summary

Technical Problem

It is difficult to efficiently synthesize chiral 3-hydroxy-3-hydroxymethyl indole and spiroethylene oxide indole compounds indole, and the chemical synthesis method has problems of harsh conditions and environmental pollution.

Method used

By using gene mutation and protein modification technology, a highly stereoselective and highly active halogenol dehalogenase mutant HheC-T134S or HheC-T134A is prepared as a biocatalyst, catalyzing the kinetic resolution reaction between nitrite and racemic spiroethylene oxide indole compounds to synthesize chiral compounds.

Benefits of technology

The efficient synthesis of chiral 3-hydroxy-3-hydroxymethyl indole and spiroethylene oxide indole was achieved, with mild reaction conditions, environmentally friendly and selective, and the synthesis of chiral compounds was achieved for the first time.

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Abstract

The invention discloses a halohydrin dehalogenase mutant and application of the halohydrin dehalogenase mutant in biosynthesis in the fields of genetic engineering and enzyme engineering. The mutant disclosed by the invention is obtained by mutating threonine at the 134 site into serine or alanine by taking wild halohydrin dehalogenase HheC (the coding gene sequence is SEQ ID No: 1, and the amino acid sequence is SEQ ID No: 2) derived from Agrobacterium tumefaciens AD1 as a parent enzyme. The mutant can catalyze ring-opening kinetic resolution of nitrite-mediated spiro ethylene oxide oxoindole, and two chiral compounds of (R)-3-hydroxy-3-hydroxymethyl oxoindole and (S)-spiro ethylene oxide oxoindole with high optical purity are obtained at the same time, and are key intermediates of many medical and important natural products.
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