Lipid biosynthesis in developing perilla seeds

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• 作者：Ichihara ; Ken'ichi ; Suda ; Yasumasa
• 关键词：Perilla frutescens ; Lamiaceae ; α ; -Linolenic acid ; Triacylglycerol ; 1-Acylglycerol-3-phosphate acyltransferase ; DG ; sn-1 ; 2-diacylglycerol ; GP ; glycerol 3-phosphate ; GPC ; glycerophosphocholine ; PA ; phosphatidic acid ; PC ; phosphatidylcholine ; TG ; triacy
• 刊名：Phytochemistry
• 出版年：2003
• 出版时间：May, 2003
• 年：2003
• 卷：63
• 期：2
• 页码：139-143
• 全文大小：181 K

文摘

In developing seeds of Perilla frutescens var. crispa, the triacylglycerol fraction was found to accumulate between 15 and 19 days after flowering. Of this, 65 % of the total fatty acids was α-linolenic acid in the mature seeds, with the latter being esterified in comparable amounts at all positions (sn-1, 2 and 3) of the glycerol residue. It was also demonstrated that, 1-acylglycerol-3-phosphate acyltransferase, which catalyzes esterification at the sn-2 position of the glycerol backbone, showed low activities for α-linolenoyl-CoA as substrate. These findings suggest that the diacylglycerol precursor for triacylglycerol synthesis is not directly derived from phosphatidic acid through the glycerol phosphate pathway.