Development of cyclic peptomer inhibitors targeting the polo-box domain of polo-like kinase 1.

Development of cyclic peptomer inhibitors targeting the polo-box domain of polo-like kinase 1.
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靶向polo样激酶1的polo盒结构域的环状肽抑制剂的开发。

DOI:
10.1016/j.bmc.2013.02.020
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发表时间:
2013-05-01
影响因子:
3.5
通讯作者:
Bang JK
Bang JK
中科院分区:
医学3区
文献类型:
--
作者:
Murugan RN;Park JE;Lim D;Ahn M;Cheong C;Kwon T;Nam KY;Choi SH;Kim BY;Yoon DY;Yaffe MB;Yu DY;Lee KS;Bang JK

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polo样激酶1 (Plk1)的polo-box结构域(PBD)是Plk1在细胞增殖中的功能所必需的。磷酸肽结合袋在PBD上的可用性为开发新的蛋白质-蛋白质相互作用抑制剂提供了独特的机会。最近发现了一个最小的5个残基长的磷酸肽PLHSpT作为Plk1 pbd特异性配体,这导致了几种基于肽的抑制剂的开发,但它们都不是环肽。通过单肽模拟物和硫醚桥接环化的结合,我们首次成功地证明了与线性亲本肽PLHSpT相比,两个环状肽体PL-116和PL-120在不失去对Plk1 PBD的单特异性的情况下显著提高了结合亲和力。这些环状肽体可以作为未来药物设计抑制Plk1 PBD的有希望的模板。
The polo-box domain (PBD) of polo-like kinase 1 (Plk1) is essentially required for the function of Plk1 in cell proliferation. The availability of the phosphopeptide-binding pocket on PBD provides a unique opportunity to develop novel protein–protein interaction inhibitors. Recent identification of a minimal 5-residue-long phosphopeptide, PLHSpT, as a Plk1 PBD-specific ligand has led to the development of several peptide-based inhibitors, but none of them is cyclic peptide. Through the combination of single-peptoid mimics and thio-ether bridged cyclization, we successfully demonstrated for the first time two cyclic peptomers, PL-116 and PL-120, dramatically improved the binding affinity without losing mono-specificity against Plk1 PBD in comparison with the linear parental peptide, PLHSpT. These cyclic peptomers could serve as promising templates for future drug designs to inhibit Plk1 PBD.
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