MTOR regulates phagosome and entotic vacuole fission Journal Article
| Authors: | Krajcovic, M.; Krishna, S.; Akkari, L.; Joyce, J. A.; Overholtzer, M. |
| Article Title: | MTOR regulates phagosome and entotic vacuole fission |
| Abstract: | Macroendocytic vacuoles formed by phagocytosis, or the live-cell engulfment program entosis, undergo sequential steps of maturation, leading to the fusion of lysosomes that digest internalized cargo. After cargo digestion, nutrients must be exported to the cytosol, and vacuole membranes must be processed by mechanisms that remain poorly defined. Here we find that phagosomes and entotic vacuoles undergo a late maturation step characterized by fission, which redistributes vacuolar contents into lysosomal networks. Vacuole fission is regulated by the serine/threonine protein kinase mammalian target of rapamycin complex 1 (mTORC1), which localizes to vacuole membranes surrounding engulfed cells. Degrading engulfed cells supply engulfing cells with amino acids that are used in translation, and rescue cell survival and mTORC1 activity in starved macrophages and tumor cells. These data identify a late stage of phagocytosis and entosis that involves processing of large vacuoles by mTOR-regulated membrane fission. © 2013 Polka and Silver. This article is distributed by The American Society for Cell Biology under license from the author(s). |
| Journal Title: | Molecular Biology of the Cell |
| Volume: | 24 |
| Issue: | 23 |
| ISSN: | 1059-1524 |
| Publisher: | The American Society for Cell Biology |
| Date Published: | 2013-12-01 |
| Start Page: | 3736 |
| End Page: | 3745 |
| Language: | English |
| DOI: | 10.1091/mbc.E13-07-0408 |
| PROVIDER: | scopus |
| PMCID: | PMC3842999 |
| PUBMED: | 24088573 |
| DOI/URL: | |
| Notes: | Export Date: 2 January 2014 -- CODEN: MBCEE -- Source: Scopus |
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7Krishna
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