title: Checks and balances in membrane phospholipid class and acyl chain homeostasis, the yeast perspective.
abstract: Glycerophospholipids are the most abundant membrane lipid constituents in most eukaryotic cells. As a consequence, phospholipid class and acyl chain homeostasis are crucial for maintaining optimal physical properties of membranes that in turn are crucial for membrane function. The topic of this review is our current understanding of membrane phospholipid homeostasis in the reference eukaryote Saccharomyces cerevisiae. After introducing the physical parameters of the membrane that are kept in optimal range, the properties of the major membrane phospholipids and their contributions to membrane structure and dynamics are summarized. Phospholipid metabolism and known mechanisms of regulation are discussed, including potential sensors for monitoring membrane physical properties. Special attention is paid to processes that maintain the phospholipid class specific molecular species profiles, and to the interplay between phospholipid class and acyl chain composition when yeast membrane lipid homeostasis is challenged. Based on the reviewed studies, molecular species selectivity of the lipid metabolic enzymes, and mass action in acyl-CoA metabolism are put forward as important intrinsic contributors to membrane lipid homeostasis.
authors: Membrane Biochemistry & Biophysics, Bijvoet Center for Biomolecular Research and Institute of Biomembranes, Utrecht University, The Netherlands. Electronic address: a.i.p.m.dekroon@uu.nl.
authors: Anton I P M
authors: AI
authors: de Kroon
authors: Pieter J
authors: PJ
authors: Rijken
authors: Cedric H
authors: CH
authors: De Smet
mesh_terms: D000214:Acyl Coenzyme A / Q000378:metabolism; D005227:Fatty Acids / Q000096:biosynthesis; D008563:Membrane Lipids / Q000737:chemistry / Q000378:metabolism*; D010712:Phosphatidic Acids / Q000737:chemistry / Q000378:metabolism; D010743:Phospholipids / Q000737:chemistry* / Q000145:classification / Q000378:metabolism; D012441:Saccharomyces cerevisiae / Q000378:metabolism*
chemical_list: D000214:Acyl Coenzyme A; D005227:Fatty Acids; D008563:Membrane Lipids; D010712:Phosphatidic Acids; D010743:Phospholipids
keywords: Membrane fluidity; Membrane intrinsic curvature; Membrane sensors; Phospholipid biosynthesis; Phospholipid properties; Phospholipid turnover