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Using Native Chemical Ligation for Site-specific Synthesis of Hetero-bis-lanthanide Peptide Conjugates: Application to Ratiometric Visible or Near-infrared Detection of Zn2.
Chemistry - A European Journal ( IF 3.9 ) Pub Date : 2020-07-01 , DOI: 10.1002/chem.202002708
Céline Cepeda 1, 2 , Laurent Raibaut 1 , Guillaume Fremy 1, 2 , Svetlana V Eliseeva 3 , Anthony Romieu 4 , Jacques Pécaut 5 , Didier Boturyn 2 , Stéphane Petoud 3 , Olivier Sénèque 1
Affiliation  

The interest in ratiometric luminescent probes that detect and quantify a specific analyte is growing. Owing to their special luminescence properties, lanthanide(III) cations offer attractive opportunities for the design of dual‐color ratiometric probes. Here, the design principle of hetero‐bis‐lanthanide peptide conjugates by using native chemical ligation is described for perfect control of the localization of each lanthanide cation within the molecule. Two zinc‐responsive probes, r‐LZF1Tb|Cs124|Eu and r‐LZF1Eu|Cs124|Tb are described on the basis of a zinc finger peptide and two DOTA (DOTA=1,4,7,10‐tetraaza‐cyclododecane‐1,4,7,10‐tetraacetic acid) complexes of terbium and europium. Both display dual‐color ratiometric emission in response to the presence of Zn2+. By using a screening approach, anthracene was identified for the sensitization of the luminescence of two near‐infrared‐emitting lanthanides, Yb3+ and Nd3+. Thus, two novel zinc‐responsive hetero‐bis‐lanthanide probes, r‐LZF3Yb|Anthra|Nd and r‐LZF3Nd|Anthra|Yb were assembled, the former offering a neat ratiometric response to Zn2+ with emission in the near‐infrared around 1000 nm, which is unprecedented.

中文翻译:

使用天然化学连接的位点合成杂双镧系元素肽共轭物:Zn2的比例可见或近红外检测中的应用。

用于检测和定量特定分析物的比例发光探针的兴趣正在增长。由于其特殊的发光特性,镧系元素(III)阳离子为双色比例探针的设计提供了诱人的机会。在此,描述了通过使用天然化学连接来设计异双-镧系元素肽共轭物的设计原理,以完美控制分子中每个镧系元素阳离子的定位。两个锌响应探针,r-LZF1 Tb | Cs124 | Eur-LZF1 Eu | Cs124 | Tb以锌指肽和two和euro的两种DOTA(DOTA = 1,4,7,10-四氮杂-环十二烷-1,4,7,10-四乙酸)络合物为基础进行描述。两者均响应于Zn 2+的存在而显示双色比例发射。通过筛选方法,鉴定出蒽可用于两种近红外发射镧系元素Yb 3+和Nd 3+的发光敏化。因此,组装了两个新颖的锌响应性异双镧系金属探针,即r-LZF3 Yb | Anthra | Ndr-LZF3 Nd | Anthra | Yb,前者在接近发射的情况下对Zn 2+具有整齐的比例响应。约1000 nm的红外光,这是前所未有的。
更新日期:2020-07-01
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