Back to Search Start Over

Improved Neomycin Sulfate Potency in Streptomyces fradiae Using Atmospheric and Room Temperature Plasma (ARTP) Mutagenesis and Fermentation Medium Optimization

Authors :
Fei Yu
Min Zhang
Junfeng Sun
Fang Wang
Xiangfei Li
Yan Liu
Zhou Wang
Xinrui Zhao
Jianghua Li
Jian Chen
Guocheng Du
Zhenglian Xue
Source :
Microorganisms, Vol 10, Iss 1, p 94 (2022)
Publication Year :
2022
Publisher :
MDPI AG, 2022.

Abstract

To improve the screening efficiency of high-yield neomycin sulfate (NM) Streptomyces fradiae strains after mutagenesis, a high-throughput screening method using streptomycin resistance prescreening (8 μg/mL) and a 24-deep well plates/microplate reader (trypan blue spectrophotometry) rescreening strategy was developed. Using this approach, we identified a high-producing NM mutant strain, Sf6-2, via six rounds of atmospheric and room temperature plasma (ARTP) mutagenesis and screening. The mutant displayed a NM potency of 7780 ± 110 U/mL and remarkably stable genetic properties over six generations. Furthermore, the key components (soluble starch, peptone, and (NH4)2SO4) affecting NM potency in fermentation medium were selected using Plackett-Burman and optimized by Box-Behnken designs. Finally, the NM potency of Sf6-2 was increased to 10,849 ± 141 U/mL at the optimal concentration of each factor (73.98 g/L, 9.23 g/L, and 5.99 g/L, respectively), and it exhibited about a 40% and 100% enhancement when compared with before optimization conditions and the wild-type strain, respectively. In this study, we provide a new S. fradiae NM production strategy and generate valuable insights for the breeding and screening of other microorganisms.

Details

Language :
English
ISSN :
20762607
Volume :
10
Issue :
1
Database :
Directory of Open Access Journals
Journal :
Microorganisms
Publication Type :
Academic Journal
Accession number :
edsdoj.f9528976e264405d943a75f729f9caec
Document Type :
article
Full Text :
https://doi.org/10.3390/microorganisms10010094