liu.seSearch for publications in DiVA
Change search
ReferencesLink to record
Permanent link

Direct link
Intracellular monitoring of superoxide dismutase expression in an Escherichia coli fed-batch cultivation using on-line disruption with at-line surface plasmon resonance detection
Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Biotechnology .
2005 (English)In: Analytical Biochemistry, ISSN 0003-2697, Vol. 342, no 1, 152-159 p.Article in journal (Refereed) Published
Abstract [en]

An on-line cell disruption system for at-line monitoring of the intracellular concentration of recombinant human superoxide dismutase (rhSOD) in a genetically modified Escherichia coli strain, HMS174(DE3) (pET11a/rhSOD), in bioreactor cultivations is described. The sampled bacteria were disrupted on-line by rapid mixing with a nonionic detergent. The recombinant protein content of the lysed bacterial sample was quantitated by a subsequent surface plasmon resonance biosensor with a specific monoclonal antibody. Extraction efficiency of the monitoring system was optimized with respect to the flow rate ratio of the cell suspension and the detergent at relevant cell densities with the aim to attain rapid monitoring. Monitoring was demonstrated for a shake flask culture and a glucose-limited fed-batch cultivation. The results are compared with a traditional enzyme-linked immunosorbent assay method showing a correlation coefficient of R2 = 0.97. Extraction efficiency of rhSOD reached 95-99% at a total processing time of 1.8-2.6 min and a contact time of 0.8-1.4 min. The possibility of extending the monitoring system to other intracellular proteins is discussed. © 2005 Elsevier Inc. All rights reserved.

Place, publisher, year, edition, pages
2005. Vol. 342, no 1, 152-159 p.
Keyword [en]
Intracellular monitoring, on-line disruption, SPR
National Category
Natural Sciences
URN: urn:nbn:se:liu:diva-30408DOI: 10.1016/j.ab.2005.03.055Local ID: 15966OAI: diva2:251230
Available from: 2009-10-09 Created: 2009-10-09 Last updated: 2011-01-12

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Mandenius, Carl-Fredrik
By organisation
The Institute of TechnologyBiotechnology
In the same journal
Analytical Biochemistry
Natural Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 15 hits
ReferencesLink to record
Permanent link

Direct link