Cytoplasmic versus periplasmic expression of site-specifically and bioorthogonally functionalized nanobodies using expressed protein ligation

Brecht Billen, Cécile Vincke, Rebekka Hansen, Nick Devoogdt, Serge Muyldermans, Peter Adriaensens, Wanda Guedens

Onderzoeksoutput: Articlepeer review

17 Citaten (Scopus)

Samenvatting

Site-specific functionalization of nanobodies after introducing bioorthogonal groups offers the possibility to biofunctionalize surfaces with a uniformly oriented layer of nanobodies. In this paper, expressed protein ligation (EPL) was used for site-specific alkynation of the model nanobody NbBcII10. In contrast to EPL constructs, which are typically expressed in the cytoplasm, nanobodies are expressed in the periplasm where its oxidizing environment ensures a correct folding and disulfide bond formation. Different pathways were explored to express the EPL constructs in the periplasm but simultaneously, the effect of cytoplasmic expression on the functionality of NbBcII10 was also evaluated. By using Escherichia coli SHuffle(®)T7 cells, it was demonstrated that expression of the EPL complex in the cytoplasm was readily established and that site-specifically mono-alkynated nanobodies can be produced with the same binding properties as the non-modified NbBcII10 expressed in the periplasm. In conclusion, this paper shows that periplasmic expression of the EPL complex is quite challenging, but cytoplasmic expression has proven to be a valuable alternative.

Originele taal-2English
Pagina's (van-tot)25-34
Aantal pagina's10
TijdschriftProtein Expression and Purification
Volume133
Vroegere onlinedatum23 feb 2017
DOI's
StatusPublished - mei 2017

Bibliografische nota

Copyright © 2017 Elsevier Inc. All rights reserved.

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