{"title":"TORC2功能的调控及其在酵母中的定位。","authors":"Anita Emmerstorfer-Augustin, Jeremy Thorner","doi":"10.1146/annurev-cellbio-011723-030346","DOIUrl":null,"url":null,"abstract":"<p><p>Every eukaryotic cell contains two distinct multisubunit protein kinase complexes that each contain a TOR (target of rapamycin) protein as the catalytic subunit. These ensembles, designated TORC1 and TORC2, serve as nutrient and stress sensors, signal integrators, and regulators of cell growth and homeostasis, but they differ in their composition, localization, and function. TORC1, activated on the cytosolic surface of the vacuole (or, in mammalian cells, on the cytosolic surface of the lysosome), promotes biosynthesis and suppresses autophagy. TORC2, located primarily at the plasma membrane (PM), maintains the proper levels and bilayer distribution of all PM components (sphingolipids, glycerophospholipids, sterols, and integral membrane proteins), which are needed for the membrane expansion that accompanies cell growth and division and for combating insults to PM integrity. This review summarizes our current understanding of the assembly, structural features, subcellular distribution, and function and regulation of TORC2, obtained largely through studies conducted with <i>Saccharomyces cerevisiae</i>.</p>","PeriodicalId":7944,"journal":{"name":"Annual review of cell and developmental biology","volume":" ","pages":"363-389"},"PeriodicalIF":11.4000,"publicationDate":"2023-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":"{\"title\":\"Regulation of TORC2 Function and Localization in Yeast.\",\"authors\":\"Anita Emmerstorfer-Augustin, Jeremy Thorner\",\"doi\":\"10.1146/annurev-cellbio-011723-030346\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>Every eukaryotic cell contains two distinct multisubunit protein kinase complexes that each contain a TOR (target of rapamycin) protein as the catalytic subunit. These ensembles, designated TORC1 and TORC2, serve as nutrient and stress sensors, signal integrators, and regulators of cell growth and homeostasis, but they differ in their composition, localization, and function. TORC1, activated on the cytosolic surface of the vacuole (or, in mammalian cells, on the cytosolic surface of the lysosome), promotes biosynthesis and suppresses autophagy. TORC2, located primarily at the plasma membrane (PM), maintains the proper levels and bilayer distribution of all PM components (sphingolipids, glycerophospholipids, sterols, and integral membrane proteins), which are needed for the membrane expansion that accompanies cell growth and division and for combating insults to PM integrity. This review summarizes our current understanding of the assembly, structural features, subcellular distribution, and function and regulation of TORC2, obtained largely through studies conducted with <i>Saccharomyces cerevisiae</i>.</p>\",\"PeriodicalId\":7944,\"journal\":{\"name\":\"Annual review of cell and developmental biology\",\"volume\":\" \",\"pages\":\"363-389\"},\"PeriodicalIF\":11.4000,\"publicationDate\":\"2023-10-16\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Annual review of cell and developmental biology\",\"FirstCategoryId\":\"99\",\"ListUrlMain\":\"https://doi.org/10.1146/annurev-cellbio-011723-030346\",\"RegionNum\":1,\"RegionCategory\":\"生物学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"2023/6/20 0:00:00\",\"PubModel\":\"Epub\",\"JCR\":\"Q1\",\"JCRName\":\"CELL BIOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Annual review of cell and developmental biology","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.1146/annurev-cellbio-011723-030346","RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2023/6/20 0:00:00","PubModel":"Epub","JCR":"Q1","JCRName":"CELL BIOLOGY","Score":null,"Total":0}
Regulation of TORC2 Function and Localization in Yeast.
Every eukaryotic cell contains two distinct multisubunit protein kinase complexes that each contain a TOR (target of rapamycin) protein as the catalytic subunit. These ensembles, designated TORC1 and TORC2, serve as nutrient and stress sensors, signal integrators, and regulators of cell growth and homeostasis, but they differ in their composition, localization, and function. TORC1, activated on the cytosolic surface of the vacuole (or, in mammalian cells, on the cytosolic surface of the lysosome), promotes biosynthesis and suppresses autophagy. TORC2, located primarily at the plasma membrane (PM), maintains the proper levels and bilayer distribution of all PM components (sphingolipids, glycerophospholipids, sterols, and integral membrane proteins), which are needed for the membrane expansion that accompanies cell growth and division and for combating insults to PM integrity. This review summarizes our current understanding of the assembly, structural features, subcellular distribution, and function and regulation of TORC2, obtained largely through studies conducted with Saccharomyces cerevisiae.
期刊介绍:
The Annual Review of Cell and Developmental Biology, established in 1985, comprehensively addresses major advancements in cell and developmental biology. Encompassing the structure, function, and organization of cells, as well as the development and evolution of cells in relation to both single and multicellular organisms, the journal explores models and tools of molecular biology. As of the current volume, the journal has transitioned from gated to open access through Annual Reviews' Subscribe to Open program, making all articles published under a CC BY license.