Ac-Tyr(PO3H2)-Leu-Pro-Met(O2)-Thr-NH2

• 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: Ac-Tyr(PO3H2)-Leu-Pro-Met(O2)-Thr-NH2
• 英文别名: [4-[(2S)-2-acetamido-3-[[(2S)-1-[(2S)-2-[[(2S)-1-[[(2S,3R)-1-amino-3-hydroxy-1-oxobutan-2-yl]amino]-4-methylsulfonyl-1-oxobutan-2-yl]carbamoyl]pyrrolidin-1-yl]-4-methyl-1-oxopentan-2-yl]amino]-3-oxopropyl]phenyl] dihydrogen phosphate
• 化学式: C₃₁H₄₉N₆O₁₃PS
• 分子量: 776.802
• InChiKey: BMDZZGVRIDHRNS-YUDYGECGSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -1.8
• 重原子数：
  52
• 可旋转键数：
  19
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.61
• 拓扑面积：
  309
• 氢给体数：
  8
• 氢受体数：
  13

反应信息

• 作为产物：
  描述：

  Fmoc-N-甲基-L-亮氨酸 、 乙酸酐 、 Fmoc-O-叔丁基-L-苏氨酸 、 (S)-2-(9H-芴-9-甲氧基羰基氨基)-4-甲磺酰基丁酸 、 Fmoc-Tyr(PO(NMe2)2)-OH 、 alkaline earth salt of/the/ methylsulfuric acid 以10.5 mg的产率得到Ac-Tyr(PO3H2)-Leu-Pro-Met(O2)-Thr-NH2
  参考文献：
  名称：

  Investigation of the Binding Determinants of Phosphopeptides Targeted to the Src Homology 2 Domain of the Signal Transducer and Activator of Transcription 3. Development of a High-Affinity Peptide Inhibitor

  摘要：

  Signal transducer and activator of transcription 3 (Stat3) is a cytosolic transcription factor that relates signals from the cell membrane directly to the nucleus where it, in complex with other proteins, initiates the transcription of antiapoptotic and cell cycling genes, e.g., Bcl-x(L) and cyclin D1. In normal cells Stat3 transduces signals from cytokines such as IL-6 and growth factors such as the epidermal growth factor. Stat3 is constitutively activated in a number of human tumors. Antisense and dominant negative gene delivery result in apoptosis and reduced cell growth, thus this protein is an attractive target for anticancer drug design. As part of our research on the design of Src homology 2 (SH2) directed peptidomimetic inhibitors of Stat3, in this paper we describe structure-activity relationship studies that provide information on the nature of peptide-protein interactions of a high-affinity phosphopeptide inhibitor of Stat3 dimerization and DNA binding, Ac-Tyr(PO3H2)-Leu-Pro-Gln-Thr-Val-NH2, peptide 1. There is a hydrophobic surface on the SH2 domain that can accommodate lipophilic groups on the N-terminus. Of the amino acids tested, leucine provided the highest affinity at pY+1 and its main chain NH is involved with a hydrogen bond with Stat3, presumably Ser636. cis-3,4-Methanoproline is optimal as a backbone constraint at pY+2. The side chain amide protons of Gln are required for high-affinity interactions. The C-terminal dipeptide, Thr-Val, can be replaced with groups ranging in size from methyl to benzyl. We synthesized a phosphopeptide incorporating groups that provided increases in affinity at each position. Thus, hydrocinnamoyl-Tyr(PO3H2)-Leu-cis-3,4-methanoPro-Gln-NHBn, 50, was the highest affinity peptide, exhibiting an IC50 of 125 nM versus 290 nM for peptide 1 in a fluorescence polarization assay.

  DOI：

  10.1021/jm050513m

文献信息

• Investigation of the Binding Determinants of Phosphopeptides Targeted to the Src Homology 2 Domain of the Signal Transducer and Activator of Transcription 3. Development of a High-Affinity Peptide Inhibitor
  作者：Coleman、Zhiyong Ren、Pijus K. Mandal、Arlin G. Cameron、Garrett A. Dyer、Seema Muranjan、Martin Campbell、Xiaomin Chen、John S. McMurray

  DOI：10.1021/jm050513m

  日期：2005.10.1

  Signal transducer and activator of transcription 3 (Stat3) is a cytosolic transcription factor that relates signals from the cell membrane directly to the nucleus where it, in complex with other proteins, initiates the transcription of antiapoptotic and cell cycling genes, e.g., Bcl-x(L) and cyclin D1. In normal cells Stat3 transduces signals from cytokines such as IL-6 and growth factors such as the epidermal growth factor. Stat3 is constitutively activated in a number of human tumors. Antisense and dominant negative gene delivery result in apoptosis and reduced cell growth, thus this protein is an attractive target for anticancer drug design. As part of our research on the design of Src homology 2 (SH2) directed peptidomimetic inhibitors of Stat3, in this paper we describe structure-activity relationship studies that provide information on the nature of peptide-protein interactions of a high-affinity phosphopeptide inhibitor of Stat3 dimerization and DNA binding, Ac-Tyr(PO3H2)-Leu-Pro-Gln-Thr-Val-NH2, peptide 1. There is a hydrophobic surface on the SH2 domain that can accommodate lipophilic groups on the N-terminus. Of the amino acids tested, leucine provided the highest affinity at pY+1 and its main chain NH is involved with a hydrogen bond with Stat3, presumably Ser636. cis-3,4-Methanoproline is optimal as a backbone constraint at pY+2. The side chain amide protons of Gln are required for high-affinity interactions. The C-terminal dipeptide, Thr-Val, can be replaced with groups ranging in size from methyl to benzyl. We synthesized a phosphopeptide incorporating groups that provided increases in affinity at each position. Thus, hydrocinnamoyl-Tyr(PO3H2)-Leu-cis-3,4-methanoPro-Gln-NHBn, 50, was the highest affinity peptide, exhibiting an IC50 of 125 nM versus 290 nM for peptide 1 in a fluorescence polarization assay.