De novo design of Ln(III) coiled coils for imaging applications.

De novo design of Ln(III) coiled coils for imaging applications.
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DOI:
10.1021/ja408741h
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发表时间:
2014-01-29
影响因子:
15
通讯作者:
Peacock AF
Peacock AF
中科院分区:
化学1区
文献类型:
--
作者:
Berwick MR;Lewis DJ;Jones AW;Parslow RA;Dafforn TR;Cooper HJ;Wilkie J;Pikramenou Z;Britton MM;Peacock AF

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已经设计了一种新的肽序列(MB1),其在三价镧系元素离子的存在下,已经被编程为自组装以形成三链金属卷曲螺旋,Ln(III)(MB1)3。结合位点已被纳入疏水核心使用天然氨基酸,限制水进入镧系元素。所得到的铽卷曲显示与缺乏第一配位球水分子一致的发光特性。尽管如此,钆线圈,第一次被报道,显示有前途的磁共振对比度的能力。
A new peptide sequence (MB1) has been designed which, in the presence of a trivalent lanthanide ion, has been programmed to self-assemble to form a three stranded metallo-coiled coil, Ln(III)(MB1)3. The binding site has been incorporated into the hydrophobic core using natural amino acids, restricting water access to the lanthanide. The resulting terbium coiled coil displays luminescent properties consistent with a lack of first coordination sphere water molecules. Despite this the gadolinium coiled coil, the first to be reported, displays promising magnetic resonance contrast capabilities.
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