24193-00-8Relevant articles and documents
“Doubly Orthogonal” Labeling of Peptides and Proteins
Tessier, Romain,Ceballos, Javier,Guidotti, Nora,Simonet-Davin, Raphael,Fierz, Beat,Waser, Jerome
supporting information, p. 2243 - 2263 (2019/08/08)
Herein, we report a cysteine bioconjugation methodology for the introduction of hypervalent iodine compounds onto biomolecules. Ethynylbenziodoxolones (EBXs) engage thiols in small organic molecules and cysteine-containing peptides and proteins in a fast and selective addition onto the alkynyl triple bond, resulting in stable vinylbenziodoxolone hypervalent iodine conjugates. The conjugation occurs at room temperature in an open flask under physiological conditions. The use of an azide-bearing EBX reagent enables a “doubly orthogonal” functionalization of the bioconjugate via strain-release-driven cycloaddition and Suzuki-Miyaura cross-coupling of the vinyl hypervalent iodine bond. We successfully applied the methodology on relevant and complex biomolecules, such as histone proteins. Through single-molecule experiments, we illustrated the potential of this doubly reactive bioconjugate by introducing a triplet-state quencher close to a fluorophore, which extended its lifetime by suppressing photobleaching. This work is therefore expected to find broad applications for peptide and protein functionalization. Understanding the molecular basis of life is essential in the search for new medicines. Chemical biology develops molecular tools for studying biological processes, setting the basis for new diagnostics and therapeutics, and relies heavily on the ability to selectively modify biomolecules. Two approaches have been especially fruitful: (1) selective modification of natural biomolecules and (2) selective reaction between non-natural functionalities in the presence of biomolecules (the so-called orthogonal bioconjugation). In our work, we contribute to both by transferring highly reactive hypervalent iodine reagents to cysteine residues in proteins and peptides. The obtained bioconjugates retain the reactive hypervalent bonds, which can be selectively functionalized via a metal-mediated reaction. Combined with a traditional azide tag, our approach allows a doubly orthogonal functionalization of biomolecules and is hence expected to be highly useful in chemical biology. Chemical biology develops molecular tools for studying biological processes, setting the basis for new diagnostics and therapeutics, and relies heavily on the ability to modify selectively biomolecules. In our work, we introduce hypervalent iodine bonds into peptides and proteins, via functionalization of cysteine, by using unique cyclic reagents developed in our group. The hypervalent bond can then be selectively modified in the presence of both natural and synthetic functional groups, opening new opportunities for applications in chemical biology.
Synthesis and in vitro and in vivo evaluation of phosphoinositide-3-kinase inhibitors
Burger, Matthew T.,Knapp, Mark,Wagman, Allan,Ni, Zhi-Jie,Hendrickson, Thomas,Atallah, Gordana,Zhang, Yanchen,Frazier, Kelly,Verhagen, Joelle,Pfister, Keith,Ng, Simon,Smith, Aaron,Bartulis, Sarah,Merrit, Hanne,Weismann, Marion,Xin, Xiaohua,Haznedar, Joshua,Voliva, Charles F.,Iwanowicz, Ed,Pecchi, Sabina
supporting information; experimental part, p. 34 - 38 (2011/04/22)
Phospoinositide-3-kinases (PI3K) are important oncology targets due to the deregulation of this signaling pathway in a wide variety of human cancers. A series of 2-morpholino, 4-substituted, 6-(3-hydroxyphenyl) pyrimidines have been reported as potent inh
ANTIVIRAL PYRIMIDINES
-
Page/Page column 78, (2010/11/03)
Disclosed herein are novel compounds comprising substituted pyrimidines, pyrazolopyrimtdines, and imidazolopyrimidines, the syntheses thereof, and compositions thereof, including pharmaceutical compositions, comprising the novel pyrimidines, pyrazolopyrimtdines, imidazolpyrimidines and related compounds. Such compounds function to inhibit entry of viruses of the Flaviviridae family, including Hepatitis C virus (HCV), into cells that are susceptible to virus infection. These compounds are useful for the treatment, therapy and/or prophylaxis of viral diseases and infection, including HCV infection.