Premium
Transport and Retention Mechanisms Govern Lipid Droplet Inheritance in Saccharomyces cerevisiae
Author(s) -
Knoblach Barbara,
Rachubinski Richard A.
Publication year - 2015
Publication title -
traffic
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.677
H-Index - 130
eISSN - 1600-0854
pISSN - 1398-9219
DOI - 10.1111/tra.12247
Subject(s) - lipid droplet , organelle , microbiology and biotechnology , saccharomyces cerevisiae , endoplasmic reticulum , lipid metabolism , biology , cell division , cell , membrane contact site , yeast , biochemistry , membrane , membrane protein , integral membrane protein
Lipid droplets are ubiquitous cellular structures involved in energy homeostasis and metabolism that have long been considered as simple inert deposits of lipid. Here, we show that lipid droplets are bona fide organelles that are actively partitioned between mother cell and daughter cell in Saccharomyces cerevisiae . Video microscopy revealed that a subset of lipid droplets moves from mother cell to bud in an ordered, vectorial process, while the remaining lipid droplets are retained by the mother cell. Bud‐directed movement of lipid droplets is mediated by the molecular motor Myo2p, while retention of lipid droplets occurs at the perinuclear endoplasmic reticulum. Lipid droplets are thus apportioned between mother cell and daughter cell at cell division rather than being made anew.