Impaired Cutinase Secretion in Saccharomyces cerevisiae Induces Irregular Endoplasmic Reticulum (ER) Membrane Proliferation, Oxidative Stress, and ER-Associated Degradation
| Autor: | Arie J. Verkleij, Cornelis Maria Jacobus Sagt, Wally H. Müller, C. T. Verrips, Johannes Boonstra, L. P. Van Der Heide |
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| Jazyk: | angličtina |
| Rok vydání: | 2002 |
| Předmět: |
Cutinase
Proteasome Endopeptidase Complex Protein Denaturation Protein Folding Saccharomyces cerevisiae Genetics and Molecular Biology Endoplasmic-reticulum-associated protein degradation Protein aggregation medicine.disease_cause Endoplasmic Reticulum Applied Microbiology and Biotechnology Multienzyme Complexes medicine Secretion Ecology biology Endoplasmic reticulum biology.organism_classification Cell biology Cysteine Endopeptidases Oxidative Stress Biochemistry Unfolded protein response Carboxylic Ester Hydrolases Hydrophobic and Hydrophilic Interactions Oxidative stress Food Science Biotechnology |
| Popis: | Impaired secretion of the hydrophobic CY028 cutinase invokes an unfolded protein response (UPR) in Saccharomyces cerevisiae cells. Here we show that the UPR in CY028-expressing S. cerevisiae cells is manifested as an aberrant morphology of the endoplasmic reticulum (ER) and as extensive membrane proliferation compared to the ER morphology and membrane proliferation of wild-type CY000-producing S. cerevisiae cells. In addition, we observed oxidative stress, which resulted in a 21-fold increase in carbonylated proteins in the CY028-producing S. cerevisiae cells. Moreover, CY028-producing S. cerevisiae cells use proteasomal degradation to reduce the amount of accumulated CY028 cutinase, thereby attenuating the stress invoked by CY028 cutinase expression. This proteasomal degradation occurs within minutes and is characteristic of ER-associated degradation (ERAD). Our results clearly show that impaired secretion of the heterologous, hydrophobic CY028 cutinase in S. cerevisiae cells leads to protein aggregation in the ER, aberrant ER morphology and proliferation, and oxidative stress, as well as a UPR and ERAD. |
| Databáze: | OpenAIRE |
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