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- W2087436338 abstract "The hexameric AAA-ATPase, Cdc48p, catalyzes an array of cellular activities, including endoplasmic reticulum (ER)-associated degradation (ERAD), ER/Golgi membrane dynamics, and DNA replication. Accumulating data suggest that unique Cdc48p partners, such as Npl4p-Ufd1p and Ubx1p/Shp1p (p47 in vertebrates), target Cdc48p for these diverse functions. Other Cdc48p-associated proteins have been identified, but the interplay among these factors and their activities is largely cryptic. We now report on a previously uncharacterized Cdc48p-associated protein, Ydr049p, also known as Vms1p, which binds Cdc48p at both the ER membrane and in the cytosol under non-stressed conditions. Loss of YDR049 modestly slows the degradation of the cystic fibrosis transmembrane conductance regulator but does not impede substrate ubiquitination, suggesting that Ydr049p acts at a postubiquitination step in the ERAD pathway. Consistent with Ydr049p playing a role in Cdc48p substrate release, ydr049 mutant cells accumulate Cdc48p-bound ubiquitinated proteins at the ER membrane. Moreover, YDR049 interacts with genes encoding select UBX (ubiquitin regulatory X) and UFD (ubiquitin fusion degradation) proteins, which are Cdc48p partners. Exacerbated growth defects are apparent in some of the mutant combinations, and synergistic effects on the degradation of cystic fibrosis transmembrane conductance regulator and CPY*, which is a soluble ERAD substrate, are evident in specific ydr049-ufd and -ubx mutants. These data suggest that Ydr049p acts in parallel with Cdc48p partners to modulate ERAD and other cellular activities." @default.
- W2087436338 created "2016-06-24" @default.
- W2087436338 creator A5002748855 @default.
- W2087436338 creator A5004896108 @default.
- W2087436338 creator A5075651487 @default.
- W2087436338 date "2011-02-01" @default.
- W2087436338 modified "2023-10-06" @default.
- W2087436338 title "A Cdc48p-associated Factor Modulates Endoplasmic Reticulum-associated Degradation, Cell Stress, and Ubiquitinated Protein Homeostasis" @default.
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- W2087436338 doi "https://doi.org/10.1074/jbc.m110.179259" @default.
- W2087436338 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3037687" @default.
- W2087436338 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/21148305" @default.
- W2087436338 hasPublicationYear "2011" @default.
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