nucleic acids (PNAs) hybridize to natural oligonucleotides according to Watson and Crick base-pairing rules. The robustness of PNA oligomers and ease of synthesis have made them an attractive platform to encode small or macromolecules for microarraying purposes and other applications based on programmable self assembly. A cornerstone of these endeavors is the orthogonality of PNAsynthesis with other chemistries
Bifunctional photo-activable fluorescent thiol reagents of a new type were synthesized. A maleimide group was bonded to an azidocoumarin group via a methylene chain as a spacer. Reagents of this type react first with a cysteine residue of a protein through the maleimide group, and then form another bond with an amino acid side chain of the protein upon irradiation with light, through a nitrene group formed from the azide. Although the reagent is non-fluorescent, the products are highly fluorescent. The fluorescence characteristics of model compounds of these reagents are also described.
Dual-Reactable Fluorescent Probes for Highly Selective and Sensitive Detection of Biological H<sub>2</sub>
S
作者:Chao Wei、Runyu Wang、Changyu Zhang、Guoce Xu、Yanyan Li、Qiang-Zhe Zhang、Lu-Yuan Li、Long Yi、Zhen Xi
DOI:10.1002/asia.201600262
日期:2016.5.6
sulfide (H2S) is an important endogenous signalingmolecule with a variety of biological functions. Development of fluorescentprobes for highly selective and sensitive detection of H2S is necessary. We show here that dual‐reactable fluorescentH2Sprobes could react with higher selectivity than single‐reactable probes. One of the dual‐reactable probes gives more than 4000‐fold turn‐on response when reacting
FLUORESCENT PROBES FOR DETECTING HYDROGEN POLYSULFIDES
申请人:Washington State University
公开号:US20180074068A1
公开(公告)日:2018-03-15
Reactive sulfur species have been recognized as an important regulator in redox biology, wherein the reactive sulfur species have been shown to be active in tumor suppressors, ion channels, and transcription factors. The disclosed invention is a novel composition of matter that allows for the detection of H
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S and H
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species in living cells. These novel compositions represent significant progress in the field of chemical, H
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S and H
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probes as they have both been successfully applied in the visualization sulfur species in living systems.
Hydrogensulfide (H2S) is an endogenously produced gaseous signaling molecule with multiple functions in many physiological and pathological processes. Herein, our group developed a novel fluorescentprobe (Flu-N3) for H2S on the basis of the 7-amino-4-methylcoumarin and fluorescein FRET system. Adding H2S to a solution of Flu-N3 resulted in a clearly observable fluorescence enhancement (50-fold).