title: Design of dual-emission chemosensors for ratiometric detection of ATP derivatives.
abstract: Nucleoside pyrophosphate (nucleoside PP) derivatives are widespread in living cells and play pivotal roles in various biological events. We report novel fluorescence chemosensors for nucleoside PPs that make use of coordination chemistry. The chemosensors, which contain two Zn(II)-dipicolylamine units, bind strongly to nucleoside PPs (K(app)>10(6) M(-1)) in aqueous solution and sense them by a dual-emission change. Detailed fluorescence and UV/Vis spectral studies revealed that the emission changes of the chemosensors upon binding to nucleoside PPs can be ascribed to the loss of coordination between Zn(II) and the acridine fluorophore. This is a unique sensing system based on the anion-induced rearrangement of the coordination. Furthermore, we demonstrated the utility of these chemosensors in real-time monitoring of two important biological processes involving nucleoside PP conversion: the apyrase-catalyzed hydrolysis of nucleoside PPs and the glycosyl transfer catalyzed by beta-1,4-galactosyltransferase.
authors: Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura Campus, Nishikyo-ku, Kyoto, 615-8510, Japan.
authors: Akio
authors: A
authors: Ojida
authors: Yoshifumi
authors: Y
authors: Miyahara
authors: Jirarut
authors: J
authors: Wongkongkatep
authors: Shun-ichi
authors: S
authors: Tamaru
authors: Kazuki
authors: K
authors: Sada
authors: Itaru
authors: I
authors: Hamachi
mesh_terms: D000255:Adenosine Triphosphate / Q000737:chemistry*; D000838:Anions; D002384:Catalysis; D002626:Chemistry, Pharmaceutical / Q000379:methods*; D011756:Diphosphates / Q000737:chemistry; D005453:Fluorescence; D005456:Fluorescent Dyes / Q000138:chemical synthesis* / Q000737:chemistry; D007700:Kinetics; D008956:Models, Chemical; D008968:Molecular Conformation; D009705:Nucleosides / Q000737:chemistry; D013050:Spectrometry, Fluorescence / Q000295:instrumentation* / Q000379:methods
chemical_list: D000838:Anions; D011756:Diphosphates; D005456:Fluorescent Dyes; D009705:Nucleosides; D000255:Adenosine Triphosphate