Bright and stable luminescent probes for target engagement profiling in live cells
作者:N. Connor Payne、Alena S. Kalyakina、Kritika Singh、Mark A. Tye、Ralph Mazitschek
DOI:10.1038/s41589-021-00877-5
日期:2021.11
techniques that enable the quantitative interrogation of interactions between proteins and other biopolymers, or with their small-molecule ligands. Time-resolved Förster resonance energy transfer (TR-FRET) assay platforms offer high sensitivity and specificity. However, the paucity of accessible and biocompatible luminescent lanthanide complexes, which are essential reagents for TR-FRET-based approaches
Hawkins, Journal of Applied Chemistry, 1956, vol. 6, p. 125,126
作者:Hawkins
DOI:——
日期:——
Reversibly Photoswitchable Fluorescent Diarylethenes Resistant against Photobleaching in Aqueous Solutions
作者:Kakishi Uno、Mariano L. Bossi、Masahiro Irie、Vladimir N. Belov、Stefan W. Hell
DOI:10.1021/jacs.9b08748
日期:2019.10.16
Low photostability in aqueous solutions is the main drawback of synthetic photochromic dyes, which limits their switching performance and utility in biology, medicine, and life sciences. Even the most promising photochromes-reversibly photoswitchable diarylethenes (DAEs) with fluorescent "closed" forms-are known to undergo only several tens (typically 20-30) of switching cycles in aqueous solutions. In this work, we introduce water-soluble and highly photostable 1,2-[bis(2-ethyl/2-isobutyl-1-benzothiophene-1,1-dioxide-6-phenyl-3-yl)]perfluorocyclopentenes decorated with four -CONHC(CH2R)(3) residues capped with 12 carboxylic acid groups (R = CH2CO2H, O(CH2)(2)CO2H). Under irradiation with UV (365 nm) and visible light (470 nm), they provide several hundred (for the "rapid" DAEs with isobutyl groups, up to 1000) full switching cycles in aqueous solutions without exclusion of air oxygen (outperforming the photoswitchable and fluorescent protein Dreiklang). The new branching approach based on secondary carboxamides with N-tert-alkyl residues decorated with polar groups may serve as a blueprint for the design of highly fatigue resistant and reversibly photoswitchable fluorescent probes applicable in life sciences as aqueous solutions.