Cytoplasmic Expression of Disulfide-Bonded Proteins: Side-by-Side Comparison Between Two Competing Strategies

Overview

Journal J Microbiol Biotechnol

Specialties Biotechnology
Microbiology

Date 2024 Apr 2

PMID 38563095

Authors

Angel Castillo-Corujo

Yuko Uchida

Mirva J Saaranen

Lloyd W Ruddock

Affiliations

Soon will be listed here.

Abstract

The production of disulfide bond-containing recombinant proteins in has traditionally been done by either refolding from inclusion bodies or by targeting the protein to the periplasm. However, both approaches have limitations. Two broad strategies were developed to allow the production of proteins with disulfide bonds in the cytoplasm of : i) engineered strains with deletions in the disulfide reduction pathways, SHuffle, and ii) the co-expression of oxidative folding catalysts, CyDisCo. However, to our knowledge, the relative effectiveness of these strategies has not been properly evaluated. Here, we systematically compare the purified yields of 14 different proteins of interest (POI) that contain disulfide bonds in their native state when expressed in both systems. We also compared the effects of different background strains, commonly used promoters, and two media types: defined and rich autoinduction. In rich autoinduction media, POI which can be produced in a soluble (non-native) state without a system for disulfide bond formation were produced in higher purified yields from SHuffle, whereas all other proteins were produced in higher purified yields using CyDisCo. In chemically defined media, purified yields were at least 10x higher in all cases using CyDisCo. In addition, the quality of the three POI tested was superior when produced using CyDisCo.

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