文献类型：期刊文献

英文题名：Enhancing transglutaminase production of Streptomyces mobaraensis by iterative mutagenesis breeding with atmospheric and room-temperature plasma (ARTP)

作者：Jiang, Ying[1];Shang, Yue-Peng[1];Li, Hao[1];Zhang, Chao[1];Pan, Jiang[1];Bai, Yun-Peng[1];Li, Chun-Xiu[1];Xu, Jian-He[1,2]

机构：[1]East China Univ Sci & Technol, State Key Lab Bioreactor Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Shanghai Collaborat Innovat Ctr Biomfg Technol, Shanghai 200237, Peoples R China

年份：2017

卷号：4

期号：1

外文期刊名：BIORESOURCES AND BIOPROCESSING

收录：EI(收录号：20224513083871);WOS:【ESCI(收录号:WOS:000461105300037)】；

基金：This work is financially sponsored by the National Natural Science Foundation of China (No. 21536004), Shanghai Commission of Science and Technology (No. 15JC1400403), and Shanghai Pujiang Program (No. 15PJ1401200).

语种：英文

外文关键词：Atmospheric and room-temperature plasma; Breeding; Streptomyces mobaraensis; Transcription level; Transglutaminase

摘要：Objectives: To improve the fermentation production of transglutaminase (TGase) from Streptomyces mobaraensis for applications in the food industry, the atmospheric and room-temperature plasma (ARTP) mutagenesis was applied to breed S. mobaraensis mutants with increased TGase production. Results: After eight rounds of iterative ARTP mutagenesis, four genetically stable mutants, Sm5-V1, Sm6-V13, Sm2V10, and Sm7-V12, were identified, which showed increased TGase production by 27, 24, 24, and 19%, respectively. The best mutant Sm5-V1 exhibited a maximum TGase activity of 5.85 U/mL during flask fermentation. Compared to the wild-type strain, the transcription levels of the zymogen TGase genes in the mutants increased significantly as indicated by quantitative real-time PCR, while the gene nucleotide sequences of the mutants did not change at all. It was shown that the overexpression of TGase zymogen gene in the mutants contributes to the increase in TGase production. Conclusions: ARTP is a potentially efficient tool for microbial mutation breeding to bring some significant changes required for the industrial applications.