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Spatially Distinct Pools of TORC1 Balance Protein Homeostasis.

Molecular cell | 2019

The eukaryotic TORC1 kinase is a homeostatic controller of growth that integrates nutritional cues and mediates signals primarily from the surface of lysosomes or vacuoles. Amino acids activate TORC1 via the Rag GTPases that combine into structurally conserved multi-protein complexes such as the EGO complex (EGOC) in yeast. Here we show that Ego1, which mediates membrane-anchoring of EGOC via lipid modifications that it acquires while traveling through the trans-Golgi network, is separately sorted to vacuoles and perivacuolar endosomes. At both surfaces, it assembles EGOCs, which regulate spatially distinct pools of TORC1 that impinge on functionally divergent effectors: vacuolar TORC1 predominantly targets Sch9 to promote protein synthesis, whereas endosomal TORC1 phosphorylates Atg13 and Vps27 to inhibit macroautophagy and ESCRT-driven microautophagy, respectively. Thus, the coordination of three key regulatory nodes in protein synthesis and degradation critically relies on a division of labor between spatially sequestered populations of TORC1.

Pubmed ID: 30527664 RIS Download

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This is a list of tools and resources that we have found mentioned in this publication.


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RRID:SCR_002105

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RRID:SCR_002750

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RRID:SCR_005191

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RRID:SCR_010910

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RRID:SCR_014485

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RRID:SCR_014583

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RRID:SCR_003070

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RRID:SCR_014485

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View all literature mentions

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RRID:SCR_014199

Software for image processing, analysis, and editing. The software includes features such as touch capabilities, a customizable toolbar, 2D and 3D image merging, and Cloud access and options.

View all literature mentions

FastQC (software resource)

RRID:SCR_014583

Quality control software that perform checks on raw sequence data coming from high throughput sequencing pipelines. This software also provides a modular set of analyses which can give a quick impression of the quality of the data prior to further analysis.

View all literature mentions