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Recombinant production of a V-L single domain antibody in Escherichia coli and analysis of its interaction with peptostreptococcal protein L

Cossins, A.J., Harrison, S., Popplewell, A.G. and Gore, M.G. (2007) Recombinant production of a V-L single domain antibody in Escherichia coli and analysis of its interaction with peptostreptococcal protein L Protein Expression and Purification, 51, (2), pp. 253-259. (doi:10.1016/j.pep.2006.07.013).

Record type: Article

Abstract

A ?-light chain from a Fab expression system was truncated by the insertion of a stop codon in the gene sequence to produce a variable light (VL) single domain antibody (dAb). Here, we describe the expression of dAb in the periplasm of Escherichia coli through fermentation in a defined media. Immunoglobulin binding domains from peptostreptococcal protein L (PpL) have been shown to bind specifically to ?-light chains. We have produced recombinant PpL, at high yield, and this was used to custom-produce PpL–Sepharose affinity columns. Here, we show that the affinity purification of VL dAb by this method is simple and efficient with no apparent loss in protein at any stage. The truncated dAb protein product was confirmed by electrospray mass spectrometry and N-terminal sequencing. When analyzed by SDS–PAGE it was shown to be over 95% pure and produced at yields of 35–65 mg/L of culture medium. The dAb protein produced was shown by NMR and CD to be a folded ?-sheet domain. This domain is bound by PpL with a Kd of not, vert, similar50 nM as determined by stopped-flow fluorimetry.

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More information

Published date: 1 February 2007
Keywords: domain antibody, protein L, fermentation, affinity

Identifiers

Local EPrints ID: 56669
URI: http://eprints.soton.ac.uk/id/eprint/56669
ISSN: 1046-5928
PURE UUID: 27f137f7-f8c0-43fd-b63a-e0065ead70af

Catalogue record

Date deposited: 11 Aug 2008
Last modified: 17 Jul 2017 14:30

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Contributors

Author: A.J. Cossins
Author: S. Harrison
Author: A.G. Popplewell
Author: M.G. Gore

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