nostosin A

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 羧酸及其衍生物
• 英文名称: nostosin A
• 英文别名: (2S,3S)-N-[(2S)-5-(diaminomethylideneamino)-1-oxopentan-2-yl]-2-[[2-hydroxy-4-(4-hydroxyphenyl)butanoyl]amino]-3-methylpentanamide
• 化学式: C₂₂H₃₅N₅O₅
• 分子量: 449.55
• InChiKey: NBAMZGXDVSQHTA-JEWWICQWSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  0.7
• 重原子数：
  32
• 可旋转键数：
  14
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.55
• 拓扑面积：
  180
• 氢给体数：
  6
• 氢受体数：
  6

反应信息

• 作为反应物：
  描述：

  nostosin A 在 盐酸 作用下， 以 水 为溶剂， 反应 19.0h， 生成 L-异亮氨酸
  参考文献：
  名称：

  Nostosins, Trypsin Inhibitors Isolated from the Terrestrial Cyanobacterium Nostoc sp. Strain FSN

  摘要：

  Two new trypsin inhibitors, nostosin A (1) and B (2), were isolated from a hydrophilic extract of Nostoc sp. strain FSN, which was collected from a paddy field in the Golestan Province of Iran. Nostosins A (1) and B (2) are composed of three subunits, 2-hydroxy-4-(4-hydroxyphenyl)butanoic acid (Hhpba), L-Ile, and L-argininal (1) or argininol (2). Nostosins A (1) and B (2) exhibited IC50 values of 0.35 and 55 μM against porcine trypsin, respectively, suggesting that the argininal aldehyde group plays a crucial role in the efficient inhibition of trypsin. Molecular docking of nostosin A (1) (449 Da), leupeptin (426 Da, IC50 0.5 μM), and spumigin E (610 Da, IC50 < 0.1 μM) with trypsin suggested prominent binding similarity between nostosin A (1) and leupeptin but only partial binding similarity with spumigin E. The number of hydrogen bonds between ligands and trypsin increased according to the length and size of the ligand molecule, and the docking affinity values followed the measured IC50 values. Nostosin A (1) is the first highly potent three-subunit trypsin inhibitor with potency comparable to the known commercial trypsin inhibitor leupeptin. These findings expand the known diversity of short-chain linear peptide protease inhibitors produced by cyanobacteria.

  DOI：

  10.1021/np500106w

文献信息

• Nostosins, Trypsin Inhibitors Isolated from the Terrestrial Cyanobacterium <i>Nostoc</i> sp. Strain FSN
  作者：Liwei Liu、Jouni Jokela、Matti Wahlsten、Bahareh Nowruzi、Perttu Permi、Yue Zhou Zhang、Henri Xhaard、David P. Fewer、Kaarina Sivonen

  DOI：10.1021/np500106w

  日期：2014.8.22

  Two new trypsin inhibitors, nostosin A (1) and B (2), were isolated from a hydrophilic extract of Nostoc sp. strain FSN, which was collected from a paddy field in the Golestan Province of Iran. Nostosins A (1) and B (2) are composed of three subunits, 2-hydroxy-4-(4-hydroxyphenyl)butanoic acid (Hhpba), L-Ile, and L-argininal (1) or argininol (2). Nostosins A (1) and B (2) exhibited IC50 values of 0.35 and 55 μM against porcine trypsin, respectively, suggesting that the argininal aldehyde group plays a crucial role in the efficient inhibition of trypsin. Molecular docking of nostosin A (1) (449 Da), leupeptin (426 Da, IC50 0.5 μM), and spumigin E (610 Da, IC50 < 0.1 μM) with trypsin suggested prominent binding similarity between nostosin A (1) and leupeptin but only partial binding similarity with spumigin E. The number of hydrogen bonds between ligands and trypsin increased according to the length and size of the ligand molecule, and the docking affinity values followed the measured IC50 values. Nostosin A (1) is the first highly potent three-subunit trypsin inhibitor with potency comparable to the known commercial trypsin inhibitor leupeptin. These findings expand the known diversity of short-chain linear peptide protease inhibitors produced by cyanobacteria.