Zhao Zhang , Xinying Wang , Xin Sha , Guohao Qiao , Fengyi Niu , Hong Ming , Caixia Cui
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引用次数: 0
Abstract
Gastrodin, the primary bioactive compound in Gastrodia elata, has therapeutic potential for nervous system disorders. However, its low yield limits the industrial-scale production. Microbial synthesis faces two major challenges: restricted UDP-glucose (UDPG) availability and inefficient glycosyltransferase activity. This study addressed these limitations by engineering a multi-module UDPG biosynthetic pathway and enhancing glycosyltransferase efficiency through site-directed mutagenesis. The recombinant strain G19, including the susy, ppk, pgm, and galU genes for UDPG production, achieved increased gastrodin yield 51-fold. In addition, the single-point mutant A347 V improved glycosyltransferase activity by over five-fold. The advanced strain G20 further improved production, reaching 4.56 g/L in shake-flask cultures. This study establishes a robust approach for glycoside production through optimized UDPG biosynthesis and enzyme engineering.
期刊介绍:
Molecular Catalysis publishes full papers that are original, rigorous, and scholarly contributions examining the molecular and atomic aspects of catalytic activation and reaction mechanisms. The fields covered are:
Heterogeneous catalysis including immobilized molecular catalysts
Homogeneous catalysis including organocatalysis, organometallic catalysis and biocatalysis
Photo- and electrochemistry
Theoretical aspects of catalysis analyzed by computational methods