Development of an Efficient Strategy to Improve Extracellular Polysaccharide Production of Using L-Phenylalanine as an Enhancer.

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ID: 64823
2019
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Abstract
has been a well-known species of basidiomycetes for a long time, and has been widely applied in the fields of food and medicine. Based on the simulation results of model ZBM1060 in our previous research, the effect of L-phenylalanine on extracellular polysaccharides (EPSs) was investigated in this study. EPS production reached 0.91 g/L at 0.4 g/L L-phenylalanine after a 24 h culture, which was 62.5% higher than that of control (0.56 g/L). Transcriptome and genome analysis showed that L-phenylalanine deaminase and benzoate 4-hydroxylase (related to L-phenylalanine metabolism) were significantly up-regulated, while the cell wall mannoprotein gene was down-regulated. Transmission electronic microscopy (TEM) and atomic force microscopy results showed that the cell wall thickness decreased by 58.58%, and cell wall porosity increased in cells treated with L-phenylalanine, which probably contribute to the increasing EPS production. This study provides an efficient strategy for fungal polysaccharide production with high output and low cost.
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Authors Ma, Zhongbao;Xu, Mengmeng;Wang, Qiong;Wang, Feng;Zheng, Huihua;Gu, Zhenghua;Li, Youran;Shi, Guiyang;Ding, Zhongyang;
Journal Frontiers in microbiology
Year 2019
DOI
10.3389/fmicb.2019.02306
URL
Keywords
cell wall ganoderma lucidum extracellular polysaccharide l-phenylalanine efficient strategy

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