PC(18:1(9Z)/20:4(5Z,8Z,11Z,14Z)) | 85082-03-7

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 甘油磷脂
• 英文名称: PC(18:1(9Z)/20:4(5Z,8Z,11Z,14Z))
• 英文别名: [(2R)-2-[(5Z,8Z,11Z,14Z)-icosa-5,8,11,14-tetraenoyl]oxy-3-[(Z)-octadec-9-enoyl]oxypropyl] 2-(trimethylazaniumyl)ethyl phosphate
• CAS: 85082-03-7
• 化学式: C46H82NO8P
• 分子量: 808.1
• InChiKey: ZAYXPDDGEIJGGW-VSDNDEBUSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  12.8
• 重原子数：
  56
• 可旋转键数：
  41
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.74
• 拓扑面积：
  111
• 氢给体数：
  0
• 氢受体数：
  8

反应信息

• 作为产物：
  描述：

  arachidonoyl-CoA(4-) 、 (2R)-2-羟基-3-[(9Z)-9-十八碳烯酰基氧基]丙基 2-(三甲基铵基)乙基磷酸酯 生成 PC(18:1(9Z)/20:4(5Z,8Z,11Z,14Z)) 、 coenzyme A
  参考文献：
  名称：

  Discovery of a lysophospholipid acyltransferase family essential for membrane asymmetry and diversity

  摘要：

  所有生物体都由细胞组成，这些细胞被包含双极脂质和蛋白质的细胞膜所包围。甘油磷脂不仅作为细胞膜的结构和功能组成部分，还是各种脂质介质的前体。由花生四烯酸或二十碳五烯酸组成的多不饱和脂肪酸位于甘油磷脂的不对称的sn-2位置，而不是sn-1位置。除了不对称性外，膜的多样性对于膜的流动性和曲率也很重要。为了解释脂肪酸的不对称分布，1958年Lands提出了sn-2位置的快速周转。然而，不对称性的分子机制和生物学意义仍然未知。在这里，我们描述了一个潜在的酶超家族，主要由三个基因家族组成，它们催化酰基辅酶A转移至溶血磷脂，以产生不同类别的磷脂。其中，我们表征了三种具有不同底物特异性和组织分布的重要酶；一种被称为溶血磷脂酰转移酶-3（果蝇nessy的哺乳动物同源物，对胚胎发育至关重要），更喜欢花生四烯酰辅酶A，而另外两种酶则将油酰辅酶A并入到溶血磷脂酰乙醇胺和溶血磷脂酰丝氨酸中。因此，我们提出，膜的多样性是由多个酶的协同和重叠反应产生的，这些酶识别甘油磷脂的极性头基和各种酰基辅酶A。我们的发现对于我们理解膜的多样性和不对称性的建立及其生物学意义构成了一个关键的里程碑。

  DOI：

  10.1073/pnas.0712245105

文献信息

• Lysophospholipid Acyltransferases and Arachidonate Recycling in Human Neutrophils
  作者：Miguel A. Gijón、Wayne R. Riekhof、Simona Zarini、Robert C. Murphy、Dennis R. Voelker

  DOI：10.1074/jbc.m806194200

  日期：2008.10

  The cycle of deacylation and reacylation of phospholipids plays a critical role in regulating availability of arachidonic acid for eicosanoid production. The major yeast lysophospholipid acyltransferase, Ale1p, is related to mammalian membrane-bound O-acyltransferase (MBOAT) proteins. We expressed four human MBOATs in yeast strains lacking Ale1p and studied their acyl-CoA and lysophospholipid specificities using novel mass spectrometry-based enzyme assays. MBOAT1 is a lysophosphatidylserine (lyso-PS) acyltransferase with preference for oleoyl-CoA. MBOAT2 also prefers oleoyl-CoA, using lysophosphatidic acid and lysophosphatidylethanolamine as acyl acceptors. MBOAT5 prefers lysophosphatidylcholine and lyso-PS to incorporate linoleoyl and arachidonoyl chains. MBOAT7 is a lysophosphatidylinositol acyltransferase with remarkable specificity for arachidonoyl-CoA. MBOAT5 and MBOAT7 are particularly susceptible to inhibition by thimerosal. Human neutrophils express mRNA for these four enzymes, and neutrophil microsomes incorporate arachidonoyl chains into phosphatidylinositol, phosphatidylcholine, PS, and phosphatidylethanolamine in a thimerosal-sensitive manner. These results strongly implicate MBOAT5 and MBOAT7 in arachidonate recycling, thus regulating free arachidonic acid levels and leukotriene synthesis in neutrophils.
• Enzymatic activities of the human AGPAT isoform 3 and isoform 5: localization of AGPAT5 to mitochondria
  作者：Sneha S. Prasad、Abhimanyu Garg、Anil K. Agarwal

  DOI：10.1194/jlr.m007575

  日期：2011.3

  The enzyme 1-acylglycerol-3-phosphate-O-acyltransferase (AGPAT) converts lysophosphatidic acid (LPA) to phosphatidic acid (PA). In this study, we show enzymatic properties, tissue distribution, and subcellular localization of human AGPAT3 and AGPAT5. In cells overexpressing these isoforms, the proteins were detected in the nuclear envelope and the endoplasmic reticulum. AGPAT5-GFP fusion protein was localized in the mitochondria of both Chinese hamster ovary and human epithelial cervical cancer cells. Using lysates of AD293 cells infected with AGPAT3 and AGPAT5 recombinant adenovirus, we show that AGPAT3 and AGPAT5 proteins have AGPAT activity. Both the isoforms have similar apparent V-max of 6.35 and 2.42 nmol/min/mg protein, respectively, for similar LPA. The difference between the two isoforms is in their use of additional lysophospholipids. AGPAT3 shows significant esterification of lysophosphatidylinositol (LPI) in the presence of C20:4 fatty acid, whereas AGPAT5 demonstrates significant acyltransferase activity toward lysophosphatidylethanolamine (LPE) in the presence of C18:1 fatty acid. The AGPAT3 mRNA is ubiquitously expressed in human tissues with several-fold differences in the expression pattern compared with the closely related AGPAT4.jlr In summary, we show that in the presence of different fatty acids, AGPAT3 and AGPAT5 prefer different lysophospholipids as acyl acceptors. More importantly, localization of overexpressed AGPAT5 (this study) as well as GPAT1 and 2 (previous studies) in mitochondria supports the idea that the mitochondria might be capable of synthesizing some of their own glycero-phospholipids.-Prasad, S. S., A. Garg, and A. K. Agarwal. Enzymatic activities of the human AGPAT isoform 3 and isoform 5: localization of AGPAT5 to mitochondria. J. Lipid Res. 2011. 52: 451-462.