Murakami N, Morimoto T, Ueda T, Nagai S I, Sakakibara J, Yamada N
Faculty of Pharmaceutical Sciences, Nagoya City University, Japan.
Phytochemistry. 1992 Aug;31(8):2641-4. doi: 10.1016/0031-9422(92)83602-u.
Two kinds of lysoglycolipids, monogalactosyl 1-monoacylglycerol and digalactosyl 1-monoacylglycerol were generated in the cyanobacterium, Phormidium tenue, when it was stored at -20 degrees for more than 1 month. By comparison of the compositions of fatty acid residues between monogalactosyl 1-monoacylglycerol and monogalactosyl diacylglycerol, digalactosyl 1-monoacylglycerol and digalactosyl diacylglycerol, respectively, the 1-monoacylgalactolipids were presumed to be formed by regioselective deacylation at the sn-1 position with subsequent acyl-group migration from the sn-2 to the sn-1 position. In contrast, 1-monoacyl derivatives of sulphoquinovosyl diacylglycerol and phosphatidylglycerol, the other membrane lipids contained in cyanobacteria, were not formed.
当蓝藻纤细席藻在-20℃储存超过1个月时，会产生两种溶血糖脂，即单半乳糖基1-单酰基甘油和双半乳糖基1-单酰基甘油。通过分别比较单半乳糖基1-单酰基甘油与单半乳糖基二酰基甘油、双半乳糖基1-单酰基甘油与双半乳糖基二酰基甘油之间脂肪酸残基的组成，推测1-单酰基半乳糖脂是通过sn-1位的区域选择性脱酰作用，随后酰基从sn-2位迁移到sn-1位形成的。相比之下，蓝藻中含有的其他膜脂，即磺基喹喔啉基二酰基甘油和磷脂酰甘油的1-单酰基衍生物并未形成。
