Sul D, Erwin J A
Department of Biology, Chemistry and Physics, Illinois Institute of Technology, Chicago 60616, USA.
Biochim Biophys Acta. 1997 Apr 1;1345(2):162-71. doi: 10.1016/s0005-2760(96)00172-5.
The membrane lipid composition of the marine ciliated protozoan Parauronema acutum was characterized. Phospholipids of P. acutum comprised 75% of the total lipids and consisted of phosphatidyl ethanolamine (33%), phosphatidyl choline and its phosphono analog (24%), phosphatidyl inositol (12%), phosphatidyl serine (8%), an unidentified phosphonolipid (18%) and small amounts of sphingomyelin, phosphatidic acid and lysophospholipid. Neutral sphingolipids comprised 15% of the total ciliate lipids and consisted of two major glycosphingolipids and six minor glycosphingolipids. These contained two kinds of long chain bases, one of which was sphingosine and either glucose or galactose or mixtures of both. The fatty acids of the total lipids of P. acutum consisted primarily of palmitic acid (13%), oleic acid (6%), linoleic acid (25%), alpha-linolenic aid (12%) plus highly unsaturated fatty acids of the omega - 3 family including all-cis 6,9,12,15-octatetraenoic acid (9%), all-cis 5,8,11,14,17-eicosapentaenoic acid (10%) and all-cis 4,7,10,13,16,19,22-docosa-hexaenoic acid (5%). Individual lipids had their own specific fatty acid patterns.
对海洋纤毛原生动物尖锐拟阿脑虫的膜脂组成进行了表征。尖锐拟阿脑虫的磷脂占总脂质的75%，由磷脂酰乙醇胺（33%）、磷脂酰胆碱及其膦酸类似物（24%）、磷脂酰肌醇（12%）、磷脂酰丝氨酸（8%）、一种未鉴定的膦脂（18%）以及少量鞘磷脂、磷脂酸和溶血磷脂组成。中性鞘脂占纤毛虫总脂质的15%，由两种主要糖鞘脂和六种次要糖鞘脂组成。这些糖鞘脂含有两种长链碱，其中一种是鞘氨醇，以及葡萄糖或半乳糖或两者的混合物。尖锐拟阿脑虫总脂质的脂肪酸主要由棕榈酸（13%）、油酸（6%）、亚油酸（25%）、α-亚麻酸（12%）以及ω-3族的高度不饱和脂肪酸组成，包括全顺式6,9,12,15-十八碳四烯酸（9%）、全顺式5,8,11,14,17-二十碳五烯酸（10%）和全顺式4,7,10,13,16,19,22-二十二碳六烯酸（5%）。个别脂质具有其自身特定的脂肪酸模式。
