کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9955374 | 1570326 | 2018 | 39 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A new vector for heterologous gene expression in Escherichia coli with increased stability in the absence of antibiotic
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
بیوشیمی، ژنتیک و زیست شناسی مولکولی
ژنتیک
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چکیده انگلیسی
Expression vectors for industrial production should be stable and allow tight control of protein synthesis. This is necessary to ensure plasmid transmission to daughter cells in order to achieve a stable population capable of synthesizing high amounts of the target protein. A high-copy-number plasmid, pAE, was previously used for laboratory-scale production of recombinant human granulocyte colony-stimulating factor (rhG-CSF) and the Schistosoma mansoni fatty acid binding protein (rSm14), but it was unstable for large-scale production. Therefore, here we evaluated a new expression vector derived from pAE, pAR-KanI, which combines two plasmid replication strategies: a high-copy plasmid pUC origin of replication as pAE, and a par locus sequence derived from pSC101, which is typical of low copy plasmids, for rhG-CSF and rSm14 production in Escherichia coli. Clones bearing these constructs were cultivated in two complex media (2YT and auto-induction) and both yielded higher-than-95% resistant colonies, before and after induction, either with or without antibiotics. In 2YT medium, we obtained 244â¯Î¼g/mL of rSm14, 181â¯Î¼g/mL and 392â¯Î¼g/mL for rhG-CSF, with and without glucose, respectively. In auto-induction medium without antibiotics, 147â¯Î¼g/mL of rSm14 and 162â¯Î¼g/mL of rhG-CSF were obtained. The new vector presented high stability for the production of both recombinant proteins in complex media in Escherichia coli, even in the absence of antibiotics, making the pAR-KanI a promising vector for industrial production of recombinant proteins.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Plasmid - Volume 98, June 2018, Pages 22-30
Journal: Plasmid - Volume 98, June 2018, Pages 22-30
نویسندگان
Fara Amelia Primelles Eguia, Henrique Roman Ramos, Stefanie Kraschowetz, Daniel Omote, Celso Raul Romero Ramos, Paulo Lee Ho, Eneas Carvalho, Viviane Maimoni Gonçalves,