One-step affinity purification of fusion proteins with optimal monodispersity and biological activity: application to aggregation-prone HPV E6 proteins.

Date publication

décembre 2018

Journal

Microbial cell factories

Auteurs

Membres identifiés du Cancéropôle Est :
Dr TRAVE Gilles , Dr NOMINE Yves

Tous les auteurs :
Bonhoure A, Demenge A, Kostmann C, San José L, De la Cal E, Armisen P, Nominé Y, Travé G

Lien Pubmed

https://www.ncbi.nlm.nih.gov/pubmed/30501645

Résumé

Bacterial expression and purification of recombinant proteins under homogeneous active form is often challenging. Fusion to highly soluble carrier proteins such as Maltose Binding Protein (MBP) often improves their folding and solubility, but self-association may still occur. For instance, HPV E6 oncoproteins, when produced as MBP-E6 fusions, are expressed as mixtures of biologically inactive oligomers and active monomers. While a protocol was previously developed to isolate MBP-E6 monomers for structural studies, it allows the purification of only one MBP-E6 construct at the time. Here, we explored a parallelizable strategy more adapted for biophysical assays aiming at comparing different E6 proteins.

Mots clés

IMAC, MBP fusion, One-step purification, Protein aggregation, Protein solubility

Référence

Microb. Cell Fact.. 2018 Dec 1;17(1):191