title: A novel sensitive and selective ligation-based ATP assay using a molecular beacon.
abstract: In this paper, a novel, facile fluorometric ATP assay with high sensitivity and excellent selectivity has been reported. This approach utilizes a molecular beacon, T4 DNA ligase and two short oligonucleotides. In the presence of ATP, the T4 DNA ligase catalyzes the ligation reaction and the ligation product restores the fluorescence of the molecular beacon. Owing to the high sensitivity of the molecular beacon and T4 DNA ligase's high substrate dependence, this novel ATP assay demonstrates exceptional selectivity and high sensitivity down to 0.14 nM in homogeneous solution. Cellular ATP concentrations in several cell lines have been determined by measuring the lysate sample containing 8.0 × 10(3) cells.
authors.affiliation: School of Biological Science and Technology, Central South University, Changsha 410013, P. R. China. lhlmcb@yahoo.com.cn
authors.forename: Changbei
authors.initials: C
authors.lastname: Ma
authors.forename: Zhiwen
authors.initials: Z
authors.lastname: Tang
authors.forename: Kemin
authors.initials: K
authors.lastname: Wang
authors.forename: Xiaohai
authors.initials: X
authors.lastname: Yang
authors.forename: Weihong
authors.initials: W
authors.lastname: Tan
mesh_terms: D000255:Adenosine Triphosphate / Q000032:analysis* / Q000378:metabolism; D017122:Bacteriophage T4 / Q000201:enzymology*; D055162:Biocatalysis; D011088:DNA Ligases / Q000737:chemistry* / Q000378:metabolism; D005470:Fluorometry; D009841:Oligonucleotides / Q000737:chemistry*
chemical_list: D009841:Oligonucleotides; D000255:Adenosine Triphosphate; D011088:DNA Ligases