Lysosome damage activates multiple pathways to prevent lysosome-dependent cell death, including a repair mechanism involving endoplasmic reticulum (ER)-lysosome membrane contact sites, phosphatidylinositol 4-kinase-2a (PI4K2A), phosphatidylinositol-4 phosphate (PI4P), and oxysterol-binding protein-like proteins (OSBPLs) lipid transfer proteins. PI4K2A localizes to the trans-Golgi network and endosomes, yet how it is delivered to damaged lysosomes remains unknown. During acute sterile damage and damage caused by intracellular bacteria, we show that ATG9A-containing vesicles perform a critical role in delivering PI4K2A to damaged lysosomes. ADP ribosylation factor interacting protein 2 (ARFIP2), a component of ATG9A vesicles, binds and sequesters PI4P on lysosomes, balancing OSBPL-dependent lipid transfer and promoting the retrieval of ATG9A vesicles through the recruitment of the adaptor protein complex-3 (AP-3). Our results identify a role for mobilized ATG9A vesicles and ARFIP2 in lysosome homeostasis after damage and bacterial infection.
ATG9A and ARFIP2 cooperate to control PI4P levels for lysosomal repair.
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作者:De Tito Stefano, Almacellas Eugenia, Dai Yu Daniel, Millard Emily, Zhang Wenxin, de Heus Cecilia, Queval Christophe, Hervás Javier H, Pellegrino Enrica, Panagi Ioanna, Fogde Ditte, Thurston Teresa L M, Klumperman Judith, Gutierrez Maximiliano, Tooze Sharon A
期刊: | Developmental Cell | 影响因子: | 8.700 |
时间: | 2025 | 起止号: | 2025 May 27 |
doi: | 10.1016/j.devcel.2025.05.007 |
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