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. 2019 Jan 15;10:2. doi: 10.3389/fpls.2019.00002

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Copyright © 2019 Michaud and Jouhet.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Lipid remodeling during Pi starvation in higher plants. During Pi starvation, phospholipids are partially degraded and replaced by the galactoglycerolipid DGDG synthesized in plastids. DGDG transport from plastids to mitochondria (Mito) occurs at contact sites and is partly mediated by the mitochondrial transmembrane lipoprotein (MTL) complex. Inside this complex, Mic60, located in the inner membrane (IM) of mitochondria, plays a key role in the import of DGDG from plastids and in the export of phosphatidylethanolamine from mitochondria. Mic60 interacts with Tom40 located in the outer membrane (OM) of mitochondria at OM-IM contact sites. Whether the transfer of DGDG to plasma membrane (PM) and vacuole (Vac) occurs at contact sites or via the vesicular transfer pathway is still unknown.