論文 - 詳細
| RRC ID | 85230 |
|---|---|
| 著者 | Ruiz-Romero G, Berdún MD, Hochstrasser M, Salas-Pino S, Daga RR. |
| タイトル | Limiting 20S proteasome assembly leads to unbalanced nucleo-cytoplasmic distribution of 26S/30S proteasomes and chronic proteotoxicity. |
| ジャーナル | iScience |
| Abstract |
In addition to the degradation of cell-cycle proteins, short-lived, damaged, or unfolded proteins are constantly cleared from cells by the proteasome. During proliferation, the proteasome localizes to the nucleus and cytoplasm; however, the functional relevance of this compartmentalization remains unclear. Here, we show that folding stress increases 26S/30S proteasome activity, which correlates with the upregulation of Ump1, a chaperone involved in 20S assembly. Conversely, ump1 inactivation results in a drop of 20S and 26S/30S proteasomes. Limited 26S/30S proteasomes in ump1-deficient cells accumulate in the nucleus where they degrade mitotic substrates, allowing cells to proceed through mitosis; however, these cells present cytoplasmic aggregates and constitutive activation of the heat shock response. Thus, our data suggest that an increase in proteasome assembly induced by folding stress functions as an additional layer to proteasome regulation and highlight the importance of balanced proteasome compartmentalization to sustain cell proliferation while maintaining proper cytoplasmic proteostasis. |
| 巻・号 | 27(11) |
| ページ | 111095 |
| 公開日 | 2024-11-15 |
| DOI | 10.1016/j.isci.2024.111095 |
| PII | S2589-0042(24)02320-4 |
| PMID | 39473973 |
| PMC | PMC11513537 |
| IF | 4.447 |
| オルトメトリクス指標 |
オルトメトリクス指標項目
|
| 最多言及媒体 | X(Twitter) |
| 各媒体での言及数の合計 | 4 |
| 過去6か月間でのオルトメトリクス指標の変動値 | 0.0 |
| リソース情報 | |
| 酵母 | FY9498 FY10063 FY17288 |