The arginine mimicking β-amino acid β³hPhe(3-H₂N-CH₂) as S1 ligand in cyclotheonamide-based β-tryptase inhibitors.

The arginine mimicking β-amino acid β³hPhe(3-H₂N-CH₂) as S1 ligand in cyclotheonamide-based β-tryptase inhibitors.
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精氨酸模仿 β-氨基酸 β-hPhe(3-HâN-CHâ) 作为环theonamide β-类胰蛋白酶抑制剂中的 S1 配体

DOI:
10.1016/j.bmc.2011.09.050
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发表时间:
2011
影响因子:
3.5
通讯作者:
Schaschke
Schaschke
中科院分区:
医学3区
文献类型:
--
作者:
Sommerhoff;Schaschke

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β-类胰蛋白酶(β-Tryptase)是一种具有胰蛋白酶样活性的肥大细胞特异性丝氨酸蛋白酶,近年来在变应性炎症领域成为一个有前途的新的治疗靶点。最近,我们已经开发了一种有效的和选择性的β-类胰蛋白酶抑制剂的基础上的天然产物cyclotheonamide E4通过实施一个碱性P3残基,解决了扩展的底物特异性的β-类胰蛋白酶的决定因素。为了进一步提高这种先导结构的亲和力/选择性,我们现在研究了β-高-3-氨甲基苯丙氨酸作为S1配体。与来自赖氨酸或精氨酸的相应β-高氨基酸相反,我们证明这种特殊的碱性β-高氨基酸是开发β-类胰蛋白酶抑制剂的特权S1配体。除了亲和力、选择性和降低的碱性之外,这些新的cyclotheonamide E4类似物在人血浆和血清中显示出优异的稳定性。
β-Tryptase, a mast-cell specific serine protease with trypsin-like activity, has emerged in the last years as a promising novel therapeutic target in the field of allergic inflammation. Recently, we have developed a potent and selective β-tryptase inhibitor based on the natural product cyclotheonamide E4 by implementing a basic P3 residue that addresses the determinants of the extended substrate specificity of β-tryptase. To further improve the affinity/selectivity profile of this lead structure, we have now investigated β-homo-3-aminomethylphenylalanine as S1 ligand. In contrast to the corresponding β-homo amino acids derived from lysine or arginine, we demonstrate that this particular basic β-homo amino acid is a privileged S1 ligand for the development of β-tryptase inhibitors. Besides affinity, selectivity and reduced basicity, these novel cyclotheonamide E4 analogs show excellent stability in human plasma and serum.
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