Reference - Detail
| RRC ID | 58999 |
|---|---|
| Author | Matsumoto S, Nakatsukasa K, Kakuta C, Tamura Y, Esaki M, Endo T. |
| Title | Msp1 Clears Mistargeted Proteins by Facilitating Their Transfer from Mitochondria to the ER. |
| Journal | Mol Cell |
| Abstract |
Normal mitochondrial functions rely on optimized composition of their resident proteins, and proteins mistargeted to mitochondria need to be efficiently removed. Msp1, an AAA-ATPase in the mitochondrial outer membrane (OM), facilitates degradation of tail-anchored (TA) proteins mistargeted to the OM, yet how Msp1 cooperates with other factors to conduct this process was unclear. Here, we show that Msp1 recognizes substrate TA proteins and facilitates their transfer to the endoplasmic reticulum (ER). Doa10 in the ER membrane then ubiquitinates them with Ubc6 and Ubc7. Ubiquitinated substrates are extracted from the ER membrane by another AAA-ATPase in the cytosol, Cdc48, with Ufd1 and Npl4 for proteasomal degradation in the cytosol. Thus, Msp1 functions as an extractase that mediates clearance of mistargeted TA proteins by facilitating their transfer to the ER for protein quality control. |
| Volume | 76(1) |
| Pages | 191-205.e10 |
| Published | 2019-10-3 |
| DOI | 10.1016/j.molcel.2019.07.006 |
| PII | S1097-2765(19)30536-2 |
| PMID | 31445887 |
| MeSH | Adenosine Triphosphatases / genetics Adenosine Triphosphatases / metabolism* Endoplasmic Reticulum / enzymology* Mitochondria / enzymology* Mitochondrial Membranes / enzymology* Proteasome Endopeptidase Complex / metabolism Protein Transport Proteolysis Saccharomyces cerevisiae / enzymology* Saccharomyces cerevisiae / genetics Saccharomyces cerevisiae Proteins / genetics Saccharomyces cerevisiae Proteins / metabolism* Ubiquitin-Protein Ligases / genetics Ubiquitin-Protein Ligases / metabolism Ubiquitination Valosin Containing Protein / genetics Valosin Containing Protein / metabolism |
| IF | 15.584 |
| Times Cited | 13 |
| Resource | |
| Yeast | BYP6744, BYP7425 |