Stable Europium(III) Complexes with Short Linkers for Site-Specific Labeling of Biomolecules
作者:Felix Faschinger、Martin Ertl、Mirjam Zimmermann、Andreas Horner、Markus Himmelsbach、Wolfgang Schöfberger、Günther Knör、Hermann J. Gruber
DOI:10.1002/open.201700122
日期:2017.12
In this study, two new terpyridine‐based EuIII complexes were synthesized, the structures of which were optimized for luminescence resonance energy‐transfer (LRET) experiments. The complexes showed high quantum yields (32 %); a single long lifetime (1.25 ms), which was not influenced by coupling to protein; very high stability in the presence of chelators such as ethylenediamine‐N,N,N′,N′‐tetraacetate
在这项研究中,合成了两种新的基于三联吡啶的 Eu III配合物,其结构针对发光共振能量转移 (LRET) 实验进行了优化。复合物显示出高量子产率 (32 %);单一的长寿命(1.25 ms),不受与蛋白质偶联的影响;在螯合剂存在下非常高的稳定性,例如乙二胺-N、N、N '、N'-四乙酸酯和乙二醇-双(2-氨基乙基醚)-N、N、N '、N′-四乙酸;并且与三磷酸腺苷和三磷酸鸟苷等辅助因子无相互作用。一个特殊的特征是 Eu III离子与马来酰亚胺或酰肼功能之间的接头长度较短,这允许半胱氨酸突变体或非天然酮基氨基酸的位点特异性偶联。因此,新的复合物似乎特别适合通过 LRET 对生物分子进行精确的距离测量。