A novel method for generating baculovirus bacmids using EGFP-mediated purification and linearization.

IF 2 4区 生物学 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY
Wujie Su, Haoyi Gu, Xiaoxia Zhang, Wenbing Wang, Fanchi Li, Bing Li
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引用次数: 0

Abstract

Baculovirus bacmids have been widely used in over-expression and gene deletion. Traditionally, baculovirus bacmids are developed by inserting an 8.6 kbp bacterial DNA cassette into baculovirus genomes either through homologous recombination in cultured cells or via in vitro cloning. In this study, by introducing Bsu36i-attached egfp to the 8.6 kbp bacterial DNA cassette, we develop a novel method for generating baculovirus bacmids. An 11.6 kbp bacterial DNA cassette containing the introduced egfp was used to generate an intermediate bacmid. With the EGFP reporter, purification was performed in cultured cells, increasing the proportions of recombinants. The intermediate bacmid containing the 11.6 kbp bacterial DNA cassette was obtained by transforming DH10B competent cells with viral DNA after 3 rounds of purification. The intermediate bacmid DNA was linearized by digestion with Bsu36i and then was co-transfected with the PCR-amplified 8.6 kbp bacterial cassette into BmN cells, where homologous recombination occurred between them. The final BmNPV bacmid was obtained by transforming DH10B competent cells with viral DNA. Capable of increasing the proportions of recombinants via purification and linearization, this method has great potential to be used for bacmid generation for baculoviruses, especially those that are not capable of producing high titers of viruses.

利用egfp介导的纯化和线性化生成杆状病毒毒株的新方法。
杆状病毒已广泛应用于过表达和基因缺失。传统上,杆状病毒杆状体是通过在培养细胞中同源重组或通过体外克隆将8.6 kbp的细菌DNA盒插入杆状病毒基因组中来开发的。在本研究中,我们通过将bsu36i附着的egfp引入8.6 kbp的细菌DNA盒中,开发了一种生成杆状病毒bacmids的新方法。一个含有引入的egfp的11.6 kbp细菌DNA盒被用来产生中间杆菌。使用EGFP报告基因,在培养细胞中进行纯化,增加重组的比例。用病毒DNA转化DH10B感受态细胞,经过3轮纯化,获得含有11.6 kbp细菌DNA盒的中间bacmid。用Bsu36i酶切将中间bacmid DNA线性化,然后与pcr扩增的8.6 kbp细菌盒共转染到BmN细胞中,两者之间发生同源重组。用病毒DNA转化DH10B感受态细胞获得最终的BmNPV bacmid。该方法能够通过纯化和线性化提高重组体的比例,具有很大的潜力用于杆状病毒的bacmid生成,特别是那些不能产生高滴度病毒的杆状病毒。
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来源期刊
Biotechnology Letters
Biotechnology Letters 工程技术-生物工程与应用微生物
CiteScore
5.90
自引率
3.70%
发文量
108
审稿时长
1.2 months
期刊介绍: Biotechnology Letters is the world’s leading rapid-publication primary journal dedicated to biotechnology as a whole – that is to topics relating to actual or potential applications of biological reactions affected by microbial, plant or animal cells and biocatalysts derived from them. All relevant aspects of molecular biology, genetics and cell biochemistry, of process and reactor design, of pre- and post-treatment steps, and of manufacturing or service operations are therefore included. Contributions from industrial and academic laboratories are equally welcome. We also welcome contributions covering biotechnological aspects of regenerative medicine and biomaterials and also cancer biotechnology. Criteria for the acceptance of papers relate to our aim of publishing useful and informative results that will be of value to other workers in related fields. The emphasis is very much on novelty and immediacy in order to justify rapid publication of authors’ results. It should be noted, however, that we do not normally publish papers (but this is not absolute) that deal with unidentified consortia of microorganisms (e.g. as in activated sludge) as these results may not be easily reproducible in other laboratories. Papers describing the isolation and identification of microorganisms are not regarded as appropriate but such information can be appended as supporting information to a paper. Papers dealing with simple process development are usually considered to lack sufficient novelty or interest to warrant publication.
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