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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Yu, Guanghai Jia, Xiaoqiang Wen, Jianping Lu, Wenyu Wang, Guoying Caiyin, Qinggele Chen, Yunlin |
| Description | Author Affiliation: Yu G ( Department of Biochemical Engineering, School of Chemical Engineering and Technology, Tianjin University, People's Republic of China.) |
| Abstract | To improve the yield of daptomycin by Streptomyces roseosporus, a method of rational screening of He-Ne Laser and N-methyl-N-nitro-N-nitrosoguanidine (NTG)-induced mutants was employed in this work. Under the optimal mutagenesis conditions (NTG of 0.3 mg/L, 40 min; irradiation at 15 mW, 15 min), two steps of combined mutations were conducted. Screening of mutants was done according to the individual resistance to n-decanoic acid and daptomycin. A mutant strain LC-54-16, with the highest daptomycin production ability of 616 mg/L was obtained, which was over 5 times higher than the wild strain LC-52-6. The transcription levels of the main dpt genes in the mutant were approximately five times higher than those in the wild. The superiority of the mutant to the wild strain was further proved by the comparative studies on the kinetics of the mutant and the wild. The decrease of the inhibition of substrate and product was further confirmed, as well. It was concluded that the method of rational screening of He-Ne Laser and NTG-induced mutants could efficiently improve the daptomycin production ability of S. roseosporus. |
| File Format | HTM / HTML |
| ISSN | 02732289 |
| Issue Number | 6 |
| Volume Number | 163 |
| e-ISSN | 15590291 |
| Journal | Applied Biochemistry and Biotechnology |
| Language | English |
| Publisher | Springer |
| Publisher Date | 2011-03-01 |
| Publisher Place | United States |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Biochemistry Discipline Biotechnology Biotechnology Methods Daptomycin Biosynthesis Genetic Testing Lasers, Gas Models, Biological Mutation Genetics Streptomyces Bioreactors Microbiology Confidence Intervals Chemistry Pharmacology Decanoic Acids Drug Resistance, Fungal Drug Effects Fermentation Gene Expression Regulation, Fungal Kinetics Methylnitronitrosoguanidine Microbial Viability Mutagenesis Reproducibility Of Results Reverse Transcriptase Polymerase Chain Reaction Time Factors Journal Article Research Support, Non-u.s. Gov't |
| Content Type | Text |
| Resource Type | Article |
| Subject | Medicine Molecular Biology Environmental Engineering Biochemistry Bioengineering Applied Microbiology and Biotechnology Biotechnology |
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