4‐Aminophthalimide Amino Acids as Small and Environment‐Sensitive Fluorescent Probes for Transmembrane Peptides
作者:Samantha Wörner、Franziska Rönicke、Anne S. Ulrich、Hans‐Achim Wagenknecht
DOI:10.1002/cbic.201900520
日期:2020.3.2
factor receptor. It was possible to distinguish their locations, either in the hydrophobic core of the lipid bilayer or at the membrane surface, by fluorescence readout, including blue shift and increased quantum yield. An important feature is the small size of the 4-aminophthalimide chromophore. It makes one of the new amino acids approximately isosteric to tryptophan, typically used as a very small
需要对跨膜 (TM) 肽进行荧光探测来补充最先进的方法(主要是定向圆二色性和固态核磁共振光谱),并允许在活细胞中成像。合成了三种在其侧链中结合了溶剂化荧光 4-氨基邻苯二甲酰亚胺的新氨基酸,以检查人表皮生长因子受体的 α-螺旋 TM 片段的局部极性。通过荧光读数(包括蓝移和增加的量子产率)可以区分它们的位置,无论是在脂质双层的疏水核心还是在膜表面。一个重要特征是 4-氨基邻苯二甲酰亚胺发色团尺寸小。它使一种新氨基酸与色氨酸大致等排,通常用作肽和蛋白质中的非常小的荧光氨基酸。与色氨酸中唯一的弱荧光吲哚系统相比,4-氨基邻苯二甲酰亚胺部分产生信息量明显更多的荧光读数,并且在生物聚合物吸收范围之外被选择性激发。