Probing Tripodal Peptide Scaffolds as Insulin and IGF-1 Receptor Ligands

Probing Tripodal Peptide Scaffolds as Insulin and IGF-1 Receptor Ligands
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探测三脚肽支架作为胰岛素和 IGF-1 受体配体

DOI:
10.1002/ejoc.201800606
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发表时间:
2018
影响因子:
2.8
通讯作者:
Fabre B
Fabre B
中科院分区:
化学3区
文献类型:
--
作者:
Fabre B

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模拟蛋白质和大肽作用的非天然化合物可以在调节蛋白质-蛋白质相互作用中找到大量应用。在这项研究中,测试了三种新的三足和三功能支架的生物学特性,这些支架设计用于在同一支架上固相合成三种不同的肽。使用源自胰岛素受体结合表位的模型肽序列或源自先前开发的胰岛素模拟物的肽,探索支架衍生化合物作为胰岛素和IGF-1受体结合剂以及胰岛素受体激活剂的质量。鉴定了两种化合物,其可以以低微摩尔亲和力结合胰岛素受体。发现影响基于支架的化合物的活性的因素是复杂的,并且化合物的性质是由于放置在支架的特定臂上的特定肽序列。这为基于支架的化合物的组合库开辟了新的途径,可以提供两种受体的新激活剂或抑制剂。与单独的肽相比,支架连接肽的代谢稳定性显著更高,进一步强调了基于支架的化合物的潜力。
Non‐natural compounds mimicking the actions of proteins and large peptides can find a plethora of applications in modulating protein–protein interactions. In this study, the biological properties of three new tripodal and trifunctional scaffolds designed for the solid‐phase synthesis of three different peptides on the same scaffold were tested. Using model peptide sequences derived from receptor‐binding epitopes from insulin or peptides derived from previously developed insulin mimetics, the quality of scaffold‐derived compounds were probed as binders of the insulin and IGF‐1 receptors and as activators of the insulin receptor. Two compounds were identified that could bind insulin receptors with low micromolar affinities. It was found that factors influencing the activities of scaffold‐based compounds are complex and that the properties of compounds are due to specific peptide sequences placed on specific arms of the scaffolds. This opens up new avenues for combinatorial libraries of scaffold‐based compounds, which could provide new activators or inhibitors of both receptors. The potential of the scaffold‐based compounds is further underlined by a substantially higher metabolic stability of scaffold‐linked peptides compared to peptides alone.
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