ArticleGenetics2010
Ssz1 restores endoplasmic reticulum-associated protein degradation in cells expressing defective cdc48-ufd1-npl4 complex by upregulating cdc48.
Article in Genetics, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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Who cites it
7 citing papers in PubMed, 14 citations in OpenAlex.
- Cooperativity between the Ribosome-Associated Chaperone Ssb/RAC and the Ubiquitin Ligase Ltn1 in Ubiquitination of Nascent Polypeptides.International journal of molecular sciences · 2020Article
- Article
- Water-Transfer Slows Aging in Saccharomyces cerevisiae.PloS one · 2016Article
- Accumulation of Basic Amino Acids at Mitochondria Dictates the Cytotoxicity of Aberrant Ubiquitin.Cell reports · 2015Article
- Multidrug resistance in fungi: regulation of transporter-encoding gene expression.Frontiers in physiology · 2014Review
- Biology of the heat shock response and protein chaperones: budding yeast (Saccharomyces cerevisiae) as a model system.Microbiology and molecular biology reviews : MMBR · 2012Review
- Protein folding and quality control in the endoplasmic reticulum: Recent lessons from yeast and mammalian cell systems.Current opinion in cell biology · 2011Review
Corrections and comments
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Authors and funding
6 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The endoplasmic reticulum (ER)-associated protein degradation (ERAD) pathway eliminates aberrant proteins from the ER. The key role of Cdc48p-Ufd1p-Npl4p is indicated by impaired ERAD in Saccharomyces cerevisiae with mutations in any of this complex's genes. We identified SSZ1 in genetic screens for cdc48-10 suppressors and show that it upregulates Cdc48p via the pleiotropic drug resistance (PDR) network. A pSSZ1 plasmid restored impaired ERAD-M of 6myc-Hmg2 in cdc48-10, ufd1-2, and npl4-1, while SSZ1 deletion had no effect. Ssz1p activates Pdr1p, the PDR master regulator. Indeed, plasmids of PDR1 or its target gene RPN4 increased cdc48-10p levels and restored ERAD-M in cdc48-10. Rpn4p regulates transcription of proteasome subunits and CDC48, thus RPN4 deletion abolished ERAD. However, the diminished proteasome level in Deltarpn4 was sufficient for degrading a cytosolic substrate, whereas the impaired ERAD-M was the result of diminished Cdc48p and was restored by expression of pCDC48. The corrected ERAD-M in the hypomorphic strains of the Cdc48 partners ufd1-2 and npl4-1 by the pCDC48 plasmid, and in cdc48-10 cells by the pcdc48-10 plasmid, combined with the finding that neither pSSZ1 nor pcdc48-10 restored ERAD-L of CPY*-HA, support our conclusion that Ssz1p suppressing effects is brought about by upregulating Cdc48p.
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