Shine on: A new rationaldesign strategy for near‐infrared‐emitting fireflyluciferins that are available in vivo has been developed using intramolecular bioluminescence resonance energy transfer (BRET). The emission wavelength could be freely tuned by the choice of BRET acceptor, and NIR bioluminescence could be detected in living cells and mice without the need for luciferase manipulation.
ketone reactive group for use in ABPs targeting the papain-family of cysteine proteases. We find that this reactive group shows highly selective labeling of cysteinecathepsins in both intact cells and total cell extracts. We observed a variable degree of background labeling that depended on the type of tag and linker used in the probe synthesis. The relative ease of synthesis of this class of compounds
Synthesis of new fluorescently labeled glycosylphosphatidylinositol (GPI) anchors
作者:Varma Saikam、Riya Raghupathy、Mahipal Yadav、Veeranjaneyulu Gannedi、Parvinder Pal Singh、Naveed A. Qazi、Sanghapal D. Sawant、Ram A. Vishwakarma
DOI:10.1016/j.tetlet.2011.06.005
日期:2011.8
The borondipyrromethene (BODIPY) labeled new glycosylphosphatidylinositol (GPI) molecules were synthesized as cellular probes to study the chemical basis of microdomain organization of GPI-anchored proteins and cholesterol in plasma membrane. The synthesis enabled by a new stereo-selective glycosylation of myo-d-inositol acceptor led to the preparation of optically pure glucosaminyl-(1-6)-α-phosph
A solution-phase synthesis of activeesters of 3′-fluorophore-labeled deoxynucleoside 5′-monophosphates was developed for thymine and cytosine as nucleobases by using two different BODIPY dyes. Starting from the respective 2′-amino-2′,3′-dideoxynucleoside-5′-monophosphate, the fluorescent oxyazabenzotriazolides can be prepared in one-pot procedures involving labeling and activation. Screening of a
Imaging of protease activity in live cells using activity based probes
申请人:Bogyo S. Matthew
公开号:US20070036725A1
公开(公告)日:2007-02-15
Methods and materials for the imaging of cells containing active proteases such as cathepsin are disclosed. The present materials include activity based probes that bind to an enzyme and are subsequently cleaved. Cleavage results in a fluorescent signal due to removal of a quenching group which, when present on the probe causes altered or no fluorescence. The probes employ an acyloxymethyl ketone reactive group, one or more amino acids for determining specificity, a fluorophore and a quencher. The probes are cell permeable and may use, for example, a QSY7 (diarylyrhodamine) quencher and a BODIPY (bora-diaza-indecene) dye.