A Fluorogenic Trehalose Probe for Tracking Phagocytosed Mycobacterium tuberculosis
摘要:
Tuberculosis (TB) disease is a global epidemic caused by the pathogenic Mycobacterium tuberculosis (Mtb). Tools that can track the replication status of viable Mtb cells within macrophages are vital for the elucidation of host-pathogen interactions. Here, we present a cephalosphorinase-dependent green trehalose (CDG-Tre) fluorogenic probe that enables fluorescence labeling of single live Bacille Calmette-Guerin (BCG) cells within macrophages at concentrations as low as 2 mu M. CDG-Tre fluoresces upon activation by BlaC, the beta-lactamase uniquely expressed by Mtb, and the fluorescent product is subsequently incorporated within the bacterial cell wall via trehalose metabolic pathway. CDG-Tre showed high selectivity for mycobacteria over other clinically prevalent species in the Corynebacterineae suborder. The unique labeling strategy of BCG by CDG-Tre provides a versatile tool for tracking Mtb in both pre- and postphagocytosis and elucidating fundamental physiological and pathological processes related to the mycomembrane.
Probe Compound for Detecting and Isolating Enzymes and Means and Methods Using the Same
申请人:Golyshin Peter N.
公开号:US20120231972A1
公开(公告)日:2012-09-13
The present invention relates to a probe compound that can comprise any substrate or metabolite of an enzymatic reaction in addition to an indicator component, such as, for example, a fluorescence dye, or the like. Moreover, the present invention relates to means for detecting enzymes in form of an array, which comprises any number of probe compounds of the invention which each comprise a different metabolite of interconnected metabolites representing the central pathways in all forms of life. Moreover, the present invention relates to a method for detecting enzymes involving the application of cell extracts or the like to the array of the invention which leads to reproducible enzymatic reactions with the substrates. These specific enzymatic reactions trigger the indicator (e.g. a fluorescence signal) and bind the enzymes to the respective cognate substrates. Moreover, the invention relates to means for isolating enzymes in form of nanoparticles coated with the probe compound of the invention. The immobilisation of the cognate substrates or metabolites on the surface of nanoparticles by means of the probe compounds allows capturing and isolating the respective enzyme, e.g. for subsequent sequencing.
[EN] PROBE COMPOUND FOR DETECTING AND ISOLATING ENZYMES AND MEANS AND METHODS USING THE SAME<br/>[FR] COMPOSÉ SONDE POUR DÉTECTER ET ISOLER DES ENZYMES ET MOYENS ET PROCÉDÉS POUR L'UTILISER
申请人:HELMHOLTZ INFEKTIONSFORSCHUNG
公开号:WO2010105851A1
公开(公告)日:2010-09-23
The present invention relates to a probe compound that can comprise any substrate or metabolite of an enzymatic reaction in addition to an indicator component, such as, for example, a fluorescence dye, or the like. Moreover, the present invention relates to means for detecting enzymes in form of an array, which comprises any number of probe compounds of the invention which each comprise a different metabolite of interconnected metabolites representing the central pathways in all forms of life. Moreover, the present invention relates to a method for detecting enzymes involving the application of cell extracts or the like to the array of the invention which leads to reproducible enzymatic reactions with the substrates. These specific enzymatic reactions trigger the indicator (e.g. a fluorescence signal) and bind the enzymes to the respective cognate substrates. Moreover, the invention relates to means for isolating enzymes in form of nanoparticles coated with the probe compound of the invention. The immobilisation of the cognate substrates or metabolites on the surface of nanoparticles by means of the probe compounds allows capturing and isolating the respective enzyme, e.g. for subsequent sequencing.
Set-Up and Validation of a High Throughput Screening Method for Human Monoacylglycerol Lipase (MAGL) Based on a New Red Fluorescent Probe
作者:Matteo Miceli、Silvana Casati、Roberta Ottria、Simone Di Leo、Ivano Eberini、Luca Palazzolo、Chiara Parravicini、Pierangela Ciuffreda
DOI:10.3390/molecules24122241
日期:——
is crucial to evaluate this modulatory activity. In the current study, we report readily synthesized long-wavelength putative fluorogenic substrates with different acylic side chains to find a new probe for MAGL activity. 7-Hydroxyresorufinyl octanoate proved to be the best substrate thanks to the highest rate of hydrolysis and the best Km and Vmax values. In addition, in silico evaluation of substrates
A Fluorogenic Trehalose Probe for Tracking Phagocytosed <i>Mycobacterium tuberculosis</i>
作者:Tingting Dai、Jinghang Xie、Qihua Zhu、Mireille Kamariza、Ke Jiang、Carolyn R. Bertozzi、Jianghong Rao
DOI:10.1021/jacs.0c07700
日期:2020.9.9
Tuberculosis (TB) disease is a global epidemic caused by the pathogenic Mycobacterium tuberculosis (Mtb). Tools that can track the replication status of viable Mtb cells within macrophages are vital for the elucidation of host-pathogen interactions. Here, we present a cephalosphorinase-dependent green trehalose (CDG-Tre) fluorogenic probe that enables fluorescence labeling of single live Bacille Calmette-Guerin (BCG) cells within macrophages at concentrations as low as 2 mu M. CDG-Tre fluoresces upon activation by BlaC, the beta-lactamase uniquely expressed by Mtb, and the fluorescent product is subsequently incorporated within the bacterial cell wall via trehalose metabolic pathway. CDG-Tre showed high selectivity for mycobacteria over other clinically prevalent species in the Corynebacterineae suborder. The unique labeling strategy of BCG by CDG-Tre provides a versatile tool for tracking Mtb in both pre- and postphagocytosis and elucidating fundamental physiological and pathological processes related to the mycomembrane.