title: Unexpectedly general replaceability of ATP in ATP-requiring enzymes.
abstract: ATP-dependent enzymes were investigated as to the stringency of their ATP requirement. For all the enzymes examined except firefly luciferase (including hexokinase, polynucleotide kinase, T4 DNA ligase, and T4 RNA ligase) ATP could be replaced with dATP, contradicting previous data. Considering the replaceable nucleotides, not only kinases (low stringency as to ATP-requirement) but also other enzymes (moderate stringency) were typed as phosphate-directed ATP recognition. Through this study, an exact view of ATP-requiring enzymes which have a profound influence on the concentration in a cell of ATP, a metabolic and regulative key substance, was obtained, and a technically useful, fluorescent ATP-substitute (2AP-TP) was introduced.
authors.affiliation: Department of Functional Materials Science, Saitama University.
authors.forename: Y
authors.initials: Y
authors.lastname: Kinoshita
authors.forename: K
authors.initials: K
authors.lastname: Nishigaki
mesh_terms: D000255:Adenosine Triphosphate / Q000378:metabolism*; D011088:DNA Ligases / Q000378:metabolism; D012321:DNA-Directed RNA Polymerases / Q000378:metabolism; D004798:Enzymes / Q000145:classification* / Q000378:metabolism*; D019143:Evolution, Molecular; D006593:Hexokinase / Q000378:metabolism; D009218:Myosins / Q000378:metabolism; D010710:Phosphates / Q000378:metabolism; D010770:Phosphotransferases / Q000378:metabolism; D011116:Polynucleotide 5'-Hydroxyl-Kinase / Q000378:metabolism; D011685:Purine Nucleotides / Q000378:metabolism; D013379:Substrate Specificity; D014764:Viral Proteins
chemical_list: C006557:2-aminopurine triphosphate; D004798:Enzymes; D010710:Phosphates; D011685:Purine Nucleotides; D014764:Viral Proteins; D000255:Adenosine Triphosphate; D010770:Phosphotransferases; D006593:Hexokinase; D011116:Polynucleotide 5'-Hydroxyl-Kinase; C062210:bacteriophage T7 RNA polymerase; D012321:DNA-Directed RNA Polymerases; D009218:Myosins; D011088:DNA Ligases