Barbosa AD~Siniossoglou S, 2019

Pubmed ID 31422915
Title Compartmentalized Synthesis of Triacylglycerol at the Inner Nuclear Membrane Regulates Nuclear Organization.
Authors Antonio D Barbosa, Koini Lim, Muriel Mari, James R Edgar, Lihi Gal, Peter Sterk, Benjamin J Jenkins, Albert Koulman, David B Savage, Maya Schuldiner, Fulvio Reggiori, Philip A Wigge, Symeon Siniossoglou
Abstract Cells dynamically adjust organelle organization in response to growth and environmental cues. This requires regulation of synthesis of phospholipids, the building blocks of organelle membranes, or remodeling of their fatty-acyl (FA) composition. FAs are also the main components of triacyglycerols (TGs), which enable energy storage in lipid droplets. How cells coordinate FA metabolism with organelle biogenesis during cell growth remains unclear. Here, we show that Lro1, an acyltransferase that generates TGs from phospholipid-derived FAs in yeast, relocates from the endoplasmic reticulum to a subdomain of the inner nuclear membrane. Lro1 nuclear targeting is regulated by cell cycle and nutrient starvation signals and is inhibited when the nucleus expands. Lro1 is active at this nuclear subdomain, and its compartmentalization is critical for nuclear integrity. These data suggest that Lro1 nuclear targeting provides a site of TG synthesis, which is coupled with nuclear membrane remodeling.
Citation Dev. Cell 2019; 50:755-766.e6

Datasets

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Paper Phenotype Condition Medium Collection Tested mutants Data Details
Barbosa AD~Siniossoglou S, 2019 standard SC - Ura (2) hap a (post-SGA) ~6,000 Discrete

Curation history

Data

Aug. 5, 2020 Waiting for tested.

Tested strains

Aug. 5, 2020 To request.