Balanced trafficking between the ER and the Golgi apparatus increases protein secretion in yeast
Journal article, 2018

The yeast Saccharomyces cerevisiae is widely used as a cell factory to produce recombinant proteins. However, S. cerevisiae naturally secretes only a few proteins, such as invertase and the mating alpha factor, and its secretory capacity is limited. It has been reported that engineering protein anterograde trafficking from the endoplasmic reticulum to the Golgi apparatus by the moderate overexpression of SEC16 could increase recombinant protein secretion in S. cerevisiae. In this study, the retrograde trafficking in a strain with moderate overexpression of SEC16 was engineered by overexpression of ADP-ribosylation factor GTP activating proteins, Gcs1p and Glo3p, which are involved in the process of COPI-coated vesicle formation. Engineering the retrograde trafficking increased the secretion of α-amylase but did not induce production of reactive oxygen species. An expanded ER membrane was detected in both the GCS1 and GLO3 overexpressio n strains. Physiological characterizations during batch fermentation showed that GLO3 overexpression had better effect on recombinant protein secretion than GCS1 overexpression. Additionally, the GLO3 overexpression strain had higher secretion of two other recombinant proteins, endoglucanase I from Trichoderma reesei and glucan-1,4-α-glucosidase from Rhizopus oryzae, indicating overexpression of GLO3 in a SEC16 moderate overexpression strain might be a general strategy for improving production of secreted proteins by yeast.

Protein secretion

Saccharomyces cerevisiae

COPI vesicle

GLO3

Retrograde trafficking

Author

Jichen Bao

Chalmers, Biology and Biological Engineering, Systems and Synthetic Biology

Mingtao Huang

Chalmers, Biology and Biological Engineering, Systems and Synthetic Biology

Dina Petranovic Nielsen

Chalmers, Biology and Biological Engineering, Systems and Synthetic Biology

Jens B Nielsen

Chalmers, Biology and Biological Engineering, Systems and Synthetic Biology

Technical University of Denmark (DTU)

AMB Express

2191-0855 (ISSN)

Vol. 8 1 37

Subject Categories

Biochemistry and Molecular Biology

Microbiology

Other Industrial Biotechnology

DOI

10.1186/s13568-018-0571-x

More information

Latest update

3/26/2018