Stabilization of a Natural β-Hairpin by a Twist-Compatible β-Turn Mimetic

Stabilization of a Natural β-Hairpin by a Twist-Compatible β-Turn Mimetic
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通过扭转兼容的 β 转弯模拟物稳定天然 β 发夹

DOI:
10.1002/ejoc.201500048
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发表时间:
2015
影响因子:
2.8
通讯作者:
A. Geyer
A. Geyer
中科院分区:
化学3区
文献类型:
--
作者:
M. Körling;A. Geyer

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Dissecting proteins into their secondary structure elements (subdomains) should yield discrete peptide epitopes. However, β‐hairpins detached from their natural protein environment usually lose their well‐defined shape and, consequently, molecular recognition processes, such as antibody binding or protein interactions, are affected significantly. Thus, the isolated central β‐hairpin (residues 12–24) of Foldon, the protein domain of this study, relaxes into a multitude of rotamers, although it still fulfills all necessary requirements to fold into a highly twisted shape. Here, two stabilization strategies from either end of the antiparallel strands of the discrete hairpin are opposed to each other, which reconstitute its shape in solution. The local side chain to backbone cyclization by the twist‐compatible bicyclic β‐turn mimetic Hot=Tap is identified to be superior to macrocyclic disulfide cyclization, which provokes local structural distortions.
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