SLICER: A Seamless Gene Deletion Method for Deinococcus radiodurans

作     者：Brumwell, Stephanie L. Van Belois, Katherine D. Nucifora, Daniel P. Karas, Bogumil J. 

作者机构：Univ Western Ontario Schulich Sch Med & Dent Dept Biochem London ON N6A 5C1 Canada Univ Western Ontario Dept Biol London ON N6A 5B7 Canada 

基　　金：Natural Sciences and Engineering Research Council of Canada (NSERC) [RGPIN-2018-06172] 

出 版 物：《BIODESIGN RESEARCH》 (生物设计研究（英文）)

年 卷 期：2023年第5卷第1期

页      码：62-71页

摘      要：Deinococcus radiodurans high resistance to various stressors combined with its ability to utilize sustainable carbon sources makes it an attractive bacterial chassis for synthetic biology and industrial bioproduction. However, to fully harness the capabilities of this microbe, further strain engineering and tool development are required. Methods for creating seamless genome modifications are an essential part of the microbial genetic toolkit to enable strain engineering. Here, we report the development of the SLICER method, which can be used to create seamless gene deletions in D. radiodurans. This process involves (a) integration of a seamless deletion cassette replacing a target gene, (b) introduction of the pSLICER plasmid to mediate cassette excision by I-SceI endonuclease cleavage and homologous recombination, and (c) curing of the helper plasmid. We demonstrate the utility of SLICER for creating multiple gene deletions in D. radiodurans by sequentially targeting 5 putative restriction-modification system genes, recycling the same selective and screening markers for each subsequent deletion. While we observed no significant increase in transformation efficiency for most of the knockout strains, we demonstrated SLICER as a promising method to create a fully restriction-minus strain to expand the synthetic biology applications of D. radiodurans, including its potential as an in vivo DNA assembly platform.

主 题 词：MODIFICATION ENZYMES DNA FRAGMENTS RECOMBINATION RESTRICTION RADIATION PLASMID REPAIR YEAST 

学科分类：0710[理学-生物科学类] 1007[医学-药学类] 100705[100705] 07[理学] 0836[0836] 071005[071005] 10[医学] 

D　O　I：10.34133/bdr.0009

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