title: Intramitochondrial phospholipid trafficking.
abstract: Mitochondrial functions and architecture rely on a defined lipid composition of their outer and inner membranes, which are characterized by a high content of non-bilayer phospholipids such as cardiolipin (CL) and phosphatidylethanolamine (PE). Mitochondrial membrane lipids are synthesized in the endoplasmic reticulum (ER) or within mitochondria from ER-derived precursor lipids, are asymmetrically distributed within mitochondria and can relocate in response to cellular stress. Maintenance of lipid homeostasis thus requires multiple lipid transport processes to be orchestrated within mitochondria. Recent findings identified members of the Ups/PRELI family as specific lipid transfer proteins in mitochondria that shuttle phospholipids between mitochondrial membranes. They cooperate with membrane organizing proteins that preserve the spatial organization of mitochondrial membranes and the formation of membrane contact sites, unravelling an intimate crosstalk of membrane lipid transport and homeostasis with the structural organization of mitochondria. This article is part of a Special Issue entitled: Lipids of Mitochondria edited by Guenther Daum.
authors.affiliation: Institute of Genetics and Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, 50931 Cologne, Germany. Electronic address: t.tatsuta@uni-koeln.de.
authors.forename: Takashi
authors.initials: T
authors.lastname: Tatsuta
authors.affiliation: Institute of Genetics and Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, 50931 Cologne, Germany; Center for Molecular Medicine (CMMC), University of Cologne, 50931 Cologne, Germany. Electronic address: thomas.langer@uni-koeln.de.
authors.forename: Thomas
authors.initials: T
authors.lastname: Langer
mesh_terms: D000818:Animals; D001692:Biological Transport / Q000502:physiology*; D002308:Cardiolipins / Q000378:metabolism; D002352:Carrier Proteins / Q000378:metabolism; D004721:Endoplasmic Reticulum / Q000378:metabolism; D006801:Humans; D008563:Membrane Lipids / Q000378:metabolism; D008928:Mitochondria / Q000378:metabolism*; D051336:Mitochondrial Membranes / Q000378:metabolism; D010714:Phosphatidylethanolamines / Q000378:metabolism; D010743:Phospholipids / Q000378:metabolism*
chemical_list: D002308:Cardiolipins; D002352:Carrier Proteins; D008563:Membrane Lipids; D010714:Phosphatidylethanolamines; D010743:Phospholipids; C030363:lipid transfer protein; C483858:phosphatidylethanolamine
keywords: Cardiolipin; Cristae; Lipid transfer proteins; Membrane contact sites; Mitochondria; Ups/PRELI