The invention provides a compound of formula I:
or a salt thereof, wherein R
1
, R
2
, R
3
, R
4
, L
1
, L
2
and Y have any of the values described in the specification, as well as compositions comprising a compound of formula I. The compounds are useful for labeling penicillin-binding proteins (PBPs).
Subtype-Selective Fluorescent Ligands as Pharmacological Research Tools for the Human Adenosine A<sub>2A</sub> Receptor
作者:Eleonora Comeo、Nicholas D. Kindon、Mark Soave、Leigh A. Stoddart、Laura E. Kilpatrick、Peter J. Scammells、Stephen J. Hill、Barrie Kellam
DOI:10.1021/acs.jmedchem.9b01856
日期:2020.3.12
selective antagonist preladenant (SCH 420814). Both families of fluorescent antagonists retained affinity at the hA2AAR, selectivity over all other adenosinereceptor subtypes and allowed clear visualization of specific receptor localization through confocal imaging. Furthermore, the Alexa Fluor 647-labeled conjugate allowed measurement of ligand binding affinities of unlabeled hA2AAR antagonists using
Triple Bioorthogonal Ligation Strategy for Simultaneous Labeling of Multiple Enzymatic Activities
作者:Lianne I. Willems、Nan Li、Bogdan I. Florea、Mark Ruben、Gijsbert A. van der Marel、Herman S. Overkleeft
DOI:10.1002/anie.201200923
日期:2012.4.27
Three at the same time: A ligation strategy combining tetrazine–norbornene cycloaddition, Staudinger–Bertozzi ligation, and copper(I)‐catalyzed click reaction was used to label the three catalytic activities of the proteasome simultaneously in a single experiment. The orthogonality of the three ligation reactions enables selective monitoring of multiple targets at the same time in complex biological
Design of a Highly Selective Quenched Activity-Based Probe and Its Application in Dual Color Imaging Studies of Cathepsin S Activity Localization
作者:Kristina Oresic Bender、Leslie Ofori、Wouter A. van der Linden、Elliot D. Mock、Gopal K. Datta、Somenath Chowdhury、Hao Li、Ehud Segal、Mateo Sanchez Lopez、Jonathan A. Ellman、Carl G. Figdor、Matthew Bogyo、Martijn Verdoes
DOI:10.1021/jacs.5b00315
日期:2015.4.15
biological functions of individual cathepsins. Here we present the design and synthesis of a near-infrared quenched activity-basedprobe (qABP) that selectively targets cathepsin S which is highly expressed in immune cells. Importantly, this high degree of selectivity is retained both in vitro and in vivo. In combination with a new green-fluorescent pan-reactive cysteinecathepsin qABP we performed dual color
半胱氨酸组织蛋白酶是一组 11 种蛋白酶,其功能最初被认为是降解具有高度冗余度的内吞物质。然而,很明显,这些酶也是健康和疾病的重要调节剂。因此,可以区分这种高度相关的酶类成员的选择性工具对于进一步描述单个组织蛋白酶的独特生物学功能至关重要。在这里,我们介绍了一种近红外淬火活性探针 (qABP) 的设计和合成,该探针选择性地靶向在免疫细胞中高度表达的组织蛋白酶 S。重要的是,这种高度的选择性在体外和体内都得到了保留。结合新的绿色荧光泛反应性半胱氨酸组织蛋白酶 qABP,我们在骨髓来源的免疫细胞中进行了双色标记研究,并确定了仅含有组织蛋白酶 S 活性的囊泡。这一观察证明了我们的互补组织蛋白酶探针的价值,并为树突状细胞中组织蛋白酶 S 活性的特异性定位提供了证据。
Hoechst tagging: a modular strategy to design synthetic fluorescent probes for live-cell nucleus imaging