Importance of phosphatidylcholine on the chloroplast surface

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• 作者：Cé ; sar Botella ; Juliette Jouhet ; Maryse A Block ; ^{maryse.block@cea.fr}
• 关键词：AAPT ; CDP-aminoalcohol ; DAG phosphoaminoalcohol-transferase ; ACBP ; acyl-CoA-binding protein ; ALA ; aminophospholipid ATPase ; ALIS ; ALA-interacting subunit ; CCT ; CTP ; phosphocholine cytidyltransferase ; CEK ; choline/ethanolamine kinase ; DAG ; diacylglycerol ; DGDG ; digalactosyldiacylglycerol ; ER ; endoplasmic reticulum ; FAD ; fatty acid desaturase ; FAX ; fatty acid exchange protein ; GPAT ; glycerol-3 phosphate acyltransferase ; LACS ; long chain acyl-CoA synthetase ; LPAAT ; lysophosphatidic acid acyltransfer
• 刊名：Progress in Lipid Research
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：65
• 期：Complete
• 页码：12-23
• 全文大小：914 K
• 卷排序：65

文摘

In plant cells, phosphatidylcholine (PC) is a major glycerolipid of most membranes but practically lacking from the plastid internal membranes. In chloroplasts, PC is absent from the thylakoids and the inner envelope membrane. It is however the main component of the outer envelope membrane, where it exclusively distributes in the outer monolayer. This unique distribution is likely related with operational compartmentalization of plant lipid metabolism. In this review, we summarize the different mechanisms involved in homeostasis of PC in plant cells. The specific origin of chloroplast PC is examined and the involvement of the P4-ATPase family of phospholipid flippases (ALA) is considered with a special attention to the recently reported effect of the endoplasmic reticulum-localized ALA10 on modification of chloroplast PC desaturation. The different possible roles of chloroplast PC are then discussed and analyzed in consideration of plant physiology.