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-Structure paper
| タイトル | Harnessing the Evolution of Proteostasis Networks to Reverse Cognitive Dysfunction. |
|---|---|
| ジャーナル・号・ページ | bioRxiv, Year 2025 |
| 掲載日 | 2025年3月2日 |
| PubMed 要旨 | The integrated stress response (ISR) is a highly conserved network essential for maintaining cellular homeostasis and cognitive function. Here, we investigated how persistent ISR activation impacts ...The integrated stress response (ISR) is a highly conserved network essential for maintaining cellular homeostasis and cognitive function. Here, we investigated how persistent ISR activation impacts cognitive performance, primarily focusing on a PPP1R15B genetic variant associated with intellectual disability. By generating a novel mouse model that mimics this human condition, we revealed that this variant destabilizes the PPP1R15B•PP1 phosphatase complex, resulting in chronic ISR activation, impaired protein synthesis, and deficits in long-term memory. Importantly, we found that the cognitive and synaptic deficits in mice are directly due to ISR activation. Leveraging insights from evolutionary biology, we characterized DP71L, a viral orthologue of PPP1R15B, through detailed molecular and structural analyses, uncovering its mechanism of action as a potent pan-ISR inhibitor. Remarkably, we found that DP71L not only buffers cognitive decline associated with a wide array of conditions-including Down syndrome, Alzheimer's disease and aging-but also enhances long-term synaptic plasticity and memory in healthy mice. These findings highlight the promise of utilizing evolutionary insight to inform innovative therapeutic strategies. |
リンク | bioRxiv / PubMed:40568171 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 3.03 - 3.8 Å |
| 構造データ | ![]() EMDB-49124: Consensus reconstruction of the Dp71L-PP1A-eIF2alpha holophosphatase stabilized by G-actin/DNAseI ![]() EMDB-49162: Focused refinement of G-actin within the Dp71L-PP1A-eIF2alpha-DNAseI-G-actin complex ![]() EMDB-49163: Focused refinement of the Dp71L-eIF2alpha-PP1A subcomplex within the holo-phosphatase complex. ![]() EMDB-49164: Focused refinement of DNAseI within the Dp71L-eIF2alpha-PP1A-Gactin-DNAseI holo-phosphatase complex. EMDB-49223, PDB-9nb9: |
| 化合物 | ![]() ChemComp-MN: ![]() ChemComp-CA: ![]() ChemComp-ATP: |
| 由来 |
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キーワード | TRANSLATION / Phosphatase / complex / ISR |
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homo sapiens (ヒト)
african swine fever virus (アフリカ豚コレラウイルス)
キーワード