title: Inhibition of T4 polynucleotide kinase by the ATP analog, beta, gamma-imidoadenylyl 5'-triphosphate.
abstract: The inhibition of T4 polynucleotide kinase by beta,gamma-imidoadenylyl 5'-triphosphate has been investigated. It was found that the ATP analog was a competitive inhibitor with regard to ATP and a noncompetitive inhibitor with regard to DNA possessing a 5'-hydroxyl group. At pH 8.0, the Ki values were 3 and 11 mM, respectively. beta,gamma-imidoadenylyl 5'-triphosphate was not a substrate in the forward reaction, but would replace ADP and ATP in the reverse reaction. The reverse reaction was also used to make beta,gamma-imidoadenylyl 5'-tetraphosphate.
mesh_terms: D000255:Adenosine Triphosphate / Q000031:analogs & derivatives*; D000266:Adenylyl Imidodiphosphate / Q000494:pharmacology*; D001483:Base Sequence; D003090:Coliphages / Q000201:enzymology*; D007700:Kinetics; D009838:Oligodeoxyribonucleotides; D010770:Phosphotransferases / Q000037:antagonists & inhibitors*; D011116:Polynucleotide 5'-Hydroxyl-Kinase / Q000037:antagonists & inhibitors*
chemical_list: D009838:Oligodeoxyribonucleotides; D000266:Adenylyl Imidodiphosphate; D000255:Adenosine Triphosphate; D010770:Phosphotransferases; D011116:Polynucleotide 5'-Hydroxyl-Kinase