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Medium and copy number effects on the secretion of human proinsulin in Escherichia coli using the universal stress promoters uspA and uspB
KTH, Superseded Departments, Biotechnology.ORCID iD: 0000-0002-6979-0069
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2003 (English)In: Applied Microbiology and Biotechnology, ISSN 0175-7598, E-ISSN 1432-0614, Vol. 61, no 06-maj, 495-501 p.Article in journal (Refereed) Published
Abstract [en]

The use of the uspA and uspB promoters (universal stress promoters) for heterologous protein production in Escherichia coli is described. Best results were obtained with a moderate copy number vector (1560 copies) bearing the uspA promoter, reaching 4.6 mg/g dry cell weight (DCW) of ZZ-proinsulin secreted to the periplasm and 1.9 mg/g DCW secreted to the culture medium. These values are about 1.7-fold higher than those previously reported with the same ZZ fusion tag and the SpA leader peptide showing that these stress promoters are potentially valuable for recombinant protein secretion in E. coli. It is further demonstrated that the use of M9 minimal medium is advantageous for protein secretion as compared to LB rich medium.

Place, publisher, year, edition, pages
2003. Vol. 61, no 06-maj, 495-501 p.
Keyword [en]
protein expression, gene, cloning, system, fusion, vectors, acid, rpos
Identifiers
URN: urn:nbn:se:kth:diva-22631ISI: 000183861300016OAI: oai:DiVA.org:kth-22631DiVA: diva2:341329
Note
QC 20100525Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2017-12-12Bibliographically approved

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Larsson, Gen

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