title: Fluorescent-labeled single-strand ATP aptamer DNA: chemo- and enantio-selectivity in sensing adenosine.
abstract: One of the intriguing applications of aptamers is sensing molecules. In principle, an aptamer can specifically recognize and bind to a unique ligand, leading to a structural change of an aptamer. By acquiring information for the structural change, the detection of the ligand can be achieved. To design and explore an aptamer molecule to detect adenosine, we have synthesized some ATP aptamer variants labeled with donor and acceptor fluorophores. Although the fluorescent response of the aptamer variants was highly dependent on experimental temperature, we have found one of the variants showing suitable fluorescent response by titration with adenosine. The aptamer variant showed remarkable selectivity for adenosine over the other ribonucleosides. On the other hand, the enantio-specificity of the aptamer variant in the ligand recognition was not enough to selectively detect d-adenosine over l-adenosine.
authors.affiliation: Osaka University of Pharmaceutical Sciences, 4-20-1 Nasahara, Takatsuki, Osaka 569-1094, Japan. urata@gly.oups.ac.jp
authors.forename: Hidehito
authors.initials: H
authors.lastname: Urata
authors.forename: Kanba
authors.initials: K
authors.lastname: Nomura
authors.forename: Shun-ichi
authors.initials: S
authors.lastname: Wada
authors.forename: Masao
authors.initials: M
authors.lastname: Akagi
mesh_terms: D000241:Adenosine / Q000737:chemistry*; D000255:Adenosine Triphosphate / Q000737:chemistry*; D052157:Aptamers, Nucleotide / Q000737:chemistry*; D031541:Fluorescence Resonance Energy Transfer / Q000379:methods*; D007536:Isomerism; D012680:Sensitivity and Specificity; D013194:Staining and Labeling / Q000379:methods
chemical_list: D052157:Aptamers, Nucleotide; D000255:Adenosine Triphosphate; D000241:Adenosine