A structural insight into the P1S1 binding mode of diaminoethylphosphonic and phosphinic acids, selective inhibitors of alanine aminopeptidases.

A structural insight into the P1S1 binding mode of diaminoethylphosphonic and phosphinic acids, selective inhibitors of alanine aminopeptidases.
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对二氨基乙基膦酸和次膦酸(丙氨酸氨基肽酶的选择性抑制剂)的 P1S1 结合模式的结构深入了解。

DOI:
10.1016/j.ejmech.2016.04.018
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发表时间:
2016
影响因子:
6.7
通讯作者:
Mucha,Artur
Mucha,Artur
中科院分区:
医学1区
文献类型:
--
作者:
Węglarz-Tomczak,Ewelina;Berlicki,Łukasz;Pawełczak,Małgorzata;Nocek,Bogusław;Joachimiak,Andrzej;Mucha,Artur

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研究了N′-取代的1,2-二氨基乙基膦酸和1,2-二氨基乙基次膦酸二肽,揭示了这些抑制剂对M1丙氨酸氨基肽酶(APN)和M17亮氨酸氨基肽酶(Leu)的意外选择性的结构背景。通过氮丙啶在改进的合成程序中获得二氨基膦酸,该合成程序进一步扩展为次膦酸假二肽系统。对不同来源(细菌、人和猪)的三种M1和一种M17金属氨基肽酶测量的抑制活性揭示了几种有效的化合物(例如,Ki= 65 nM(HsAPN)。用X射线晶体学方法测定了M1代表物(脑膜炎奈瑟菌APN)与N-苄基-1,2-二氨基乙基膦酸和N-环己基-1,2-二氨基乙基膦酸的两种配合物的结构。这些结构的分析和模型的膦酸络合物的人类直系同源物提供了一个洞察的作用,额外的氨基和疏水取代基的配体内的S1活性位点区域。
N′-substituted 1,2-diaminoethylphosphonic acids and 1,2-diaminoethylphosphinic dipeptides were explored to unveil the structural context of the unexpected selectivity of these inhibitors of M1 alanine aminopeptidases (APNs) versus M17 leucine aminopeptidase (LAP). The diaminophosphonic acids were obtained via aziridines in an improved synthetic procedure that was further expanded for the phosphinic pseudodipeptide system. The inhibitory activity, measured for three M1 and one M17 metalloaminopeptidases of different sources (bacterial, human and porcine), revealed several potent compounds (e.g.,Ki= 65 nM of1uforHsAPN). Two structures of an M1 representative (APN from Neisseria meningitidis) in complex withN-benzyl-1,2-diaminoethylphosphonic acid andN-cyclohexyl-1,2-diaminoethylphosphonic acid were determined by the X-ray crystallography. The analysis of these structures and the models of the phosphonic acid complexes of the human ortholog provided an insight into the role of the additional amino group and the hydrophobic substituents of the ligands within the S1 active site region.
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