DG(22:6(4Z,7Z,10Z,13Z,16Z,19Z)/22:6(4Z,7Z,10Z,13Z,16Z,19Z)/0:0)

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 甘油脂
• 英文名称: DG(22:6(4Z,7Z,10Z,13Z,16Z,19Z)/22:6(4Z,7Z,10Z,13Z,16Z,19Z)/0:0)
• 英文别名: [(2S)-2-[(4Z,7Z,10Z,13Z,16Z,19Z)-docosa-4,7,10,13,16,19-hexaenoyl]oxy-3-hydroxypropyl] (4Z,7Z,10Z,13Z,16Z,19Z)-docosa-4,7,10,13,16,19-hexaenoate
• 化学式: C₄₇H₆₈O₅
• 分子量: 713.0
• InChiKey: XIAZEYRSKHAPND-CYDJSWNTSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  12.2
• 重原子数：
  52
• 可旋转键数：
  34
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.45
• 拓扑面积：
  72.8
• 氢给体数：
  1
• 氢受体数：
  5

反应信息

• 作为产物：
  描述：

  1,2-di[(4Z,7Z,10Z,13Z,16Z,19Z)-docosahexaenoyl]-sn-glycero-3-phosphate(2-) 、 水 生成 DG(22:6(4Z,7Z,10Z,13Z,16Z,19Z)/22:6(4Z,7Z,10Z,13Z,16Z,19Z)/0:0) 、 H3PO4
  参考文献：
  名称：

  Characterization of the Human LPIN1-encoded Phosphatidate Phosphatase Isoforms

  摘要：

  The human LPIN1 gene encodes the protein lipin 1, which possesses phosphatidate (PA) phosphatase (3-sn-phosphatidate phosphohydrolase; EC 3.1.3.4) activity (Han, G.-S., Wu, W.-I., and Carman, G. M. (2006) J. Biol. Chem. 281, 9210-9218). In this work, we characterized human lipin 1 alpha, beta, and gamma isoforms that were expressed in Escherichia coli and purified to near homogeneity. PA phosphatase activities of the alpha, beta, and gamma isoforms were dependent on Mg2+ or Mn2+ ions at pH 7.5 at 37 degrees C. The activities were inhibited by concentrations of Mg2+ and Mn2+ above their optimums and by Ca2+, Zn2+, N-ethylmaleimide, propranolol, and the sphingoid bases sphingosine and sphinganine. The activities were thermally labile at temperatures above 40 degrees C. The alpha, beta, and gamma activities followed saturation kinetics with respect to the molar concentration of PA (K-m values of 0.35, 0.24, and 0.11 mM, respectively) but followed positive cooperative (Hill number similar to 2) kinetics with respect to the surface concentration of PA (K-m values of 4.2, 4.5, and 4.3 mol %, respectively) in Triton X-100/PA-mixed micelles. The turnover numbers (k(cat)) for the alpha, beta, and gamma isoforms were 68.8 +/- 3.5, 42.8 +/- 2.5, and 5.7 +/- 0.2 s(-1), respectively, whereas their energy of activation values were 14.2, 15.5, and 18.5 kcal/mol, respectively. The isoform activities were dependent on PA as a substrate and required at least one unsaturated fatty acyl moiety for maximum activity.

  DOI：

  10.1074/jbc.m110.117747

文献信息

• Characterization of the Human LPIN1-encoded Phosphatidate Phosphatase Isoforms
  作者：Gil-Soo Han、George M. Carman

  DOI：10.1074/jbc.m110.117747

  日期：2010.5

  The human LPIN1 gene encodes the protein lipin 1, which possesses phosphatidate (PA) phosphatase (3-sn-phosphatidate phosphohydrolase; EC 3.1.3.4) activity (Han, G.-S., Wu, W.-I., and Carman, G. M. (2006) J. Biol. Chem. 281, 9210-9218). In this work, we characterized human lipin 1 alpha, beta, and gamma isoforms that were expressed in Escherichia coli and purified to near homogeneity. PA phosphatase activities of the alpha, beta, and gamma isoforms were dependent on Mg2+ or Mn2+ ions at pH 7.5 at 37 degrees C. The activities were inhibited by concentrations of Mg2+ and Mn2+ above their optimums and by Ca2+, Zn2+, N-ethylmaleimide, propranolol, and the sphingoid bases sphingosine and sphinganine. The activities were thermally labile at temperatures above 40 degrees C. The alpha, beta, and gamma activities followed saturation kinetics with respect to the molar concentration of PA (K-m values of 0.35, 0.24, and 0.11 mM, respectively) but followed positive cooperative (Hill number similar to 2) kinetics with respect to the surface concentration of PA (K-m values of 4.2, 4.5, and 4.3 mol %, respectively) in Triton X-100/PA-mixed micelles. The turnover numbers (k(cat)) for the alpha, beta, and gamma isoforms were 68.8 +/- 3.5, 42.8 +/- 2.5, and 5.7 +/- 0.2 s(-1), respectively, whereas their energy of activation values were 14.2, 15.5, and 18.5 kcal/mol, respectively. The isoform activities were dependent on PA as a substrate and required at least one unsaturated fatty acyl moiety for maximum activity.