Eisosomes.

Curr Biol

Department of Biochemistry and Cell Biology, The Geisel School of Medicine at Dartmouth, Hanover, NH 03755, USA. Electronic address:

Published: April 2018

Moseley discusses the molecular and mechanical functions of eisosomes - invaginations from the yeast plasma membrane.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6214159PMC
http://dx.doi.org/10.1016/j.cub.2017.11.073DOI Listing

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Similar Publications

Eisosomes.

Curr Biol

April 2018

Department of Biochemistry and Cell Biology, The Geisel School of Medicine at Dartmouth, Hanover, NH 03755, USA. Electronic address:

Moseley discusses the molecular and mechanical functions of eisosomes - invaginations from the yeast plasma membrane.

View Article and Find Full Text PDF

Cytoskeletal polymers are organized into a wide variety of higher-order structures in cells. The yeast BAR domain protein Pil1 self-assembles into tubules in vitro, and forms linear polymers at cortical eisosomes in cells. In the fission yeast S.

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Cell surface area rapidly increases during mechanical and hypoosmotic stresses. Such expansion of the plasma membrane requires 'membrane reservoirs' that provide surface area and buffer membrane tension, but the sources of this membrane remain poorly understood. In principle, the flattening of invaginations and buds within the plasma membrane could provide this additional surface area, as recently shown for caveolae in animal cells.

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Eisosomes are multiprotein structures that generate linear invaginations at the plasma membrane of yeast cells. The core component of eisosomes, the BAR domain protein Pil1, generates these invaginations through direct binding to lipids including phosphoinositides. Eisosomes promote hydrolysis of phosphatidylinositol 4,5 bisphosphate (PI(4,5)P2) by functioning with synaptojanin, but the cellular processes regulated by this pathway have been unknown.

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Stable compartments of the plasma membrane promote a wide range of cellular functions. In yeast cells, cytosolic structures called eisosomes generate prominent cortical invaginations of unknown function. Through a series of genetic screens in fission yeast, we found that the eisosome proteins Pil1 and Sle1 function with the synaptojanin-like lipid phosphatase Syj1 and its ligand Tax4.

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