Disassembly of Dendritic Micellar Containers Due to Protein Binding
作者:Malar A. Azagarsamy、Volkan Yesilyurt、S. Thayumanavan
DOI:10.1021/ja100746d
日期:2010.4.7
Disassembling a supramolecularassembly and releasing the contents of the assembly in response to a stimulus are important goals of supramolecular chemistry. When proteins are used as the stimulus, the biological relevance of the supramolecular event dramatically increases. Although there have been efforts in which such disassembly has been achieved using enzymatic action, such events based on ligand-receptor
Fostriecin is a phosphate monoester with excellent antitumor activity against mouse leukemia, and it is a potent inhibitor of protein phosphatase (PP) 2A. This compound has been predicted to covalently bind to the Cys269 residue of the PP2A catalytic subunit (PP2Ac) at the alpha,beta-unsaturated lactone via a conjugate addition reaction. However, this binding has not yet been experimentally proven. To confirm such binding, we synthesized biotin-labeled fostriecin (bio-Fos), which has an inhibitory activity against the proliferation of mouse leukemia cells. We showed that fostriecin directly binds to PP2Ac in HeLa S3 cells by pull-down assays using bio-Fos. Moreover, we directly demonstrated that fostriecin covalently binds to the Cys269 residue of PP2Ac by matrix assisted laser desorption/ionization time-of-flight mass spectrometry analysis. From these results, the inhibitory mechanism of fostriecin on PP2A activity is discussed. (C) 2009 Elsevier Ltd. All rights reserved.
TARGETED SIALIC ACID LABELING COMPOUNDS, METHODS, AND USES THEREOF
申请人:MUSC FOUNDATION FOR RESEARCH DEVELOPMENT
公开号:US20210325398A1
公开(公告)日:2021-10-21
Described herein are compounds, compositions, and reagents capable of labeling a biomolecule. In some embodiments, the compounds, compositions, and reagents allow for labeling to occur using a bioorthagonal reaction outside of a living cell and without a glycosyltransferase enzyme. Also described herein are methods of using the compounds compositions and reagents described herein.