title: Synthesis of a reactive ATP analog and its preliminary application as an affinity labeling reagent.
abstract: A reactive ATP analog, N6-(6-bromoacetamidohexyl)-AMP.PCP, was synthesized in an attempt to covalently label the binding sites for adenine nucleotides, especially ATP, of various enzymes which utilize adenine nucleotides as substrates, cofactors, inhibitors or allosteric effectors. This reagent rapidly inactivated rabbit muscle glyceraldehyde 3-phosphate dehydrogenase (GPD), myokinase (MK), and creatine kinase (CK) under very mild conditions. Adenine nucleotide substrates prevented the inactivation. In the case of GPD, complete inactivation was observed when 1 mol of the reagent per mol of enzyme subunit was incorporated into the enzyme. These results indicate that the present ATP analog may be useful as an affinity labeling reagent for various adenine nucleotide-dependent enzymes.
mesh_terms: D000255:Adenosine Triphosphate / Q000031:analogs & derivatives* / Q000378:metabolism; D000263:Adenylate Kinase / Q000378:metabolism; D000345:Affinity Labels / Q000138:chemical synthesis / Q000378:metabolism*; D000818:Animals; D003402:Creatine Kinase / Q000378:metabolism; D005987:Glyceraldehyde-3-Phosphate Dehydrogenases / Q000378:metabolism; D011817:Rabbits
chemical_list: D000345:Affinity Labels; D000255:Adenosine Triphosphate; D005987:Glyceraldehyde-3-Phosphate Dehydrogenases; D003402:Creatine Kinase; D000263:Adenylate Kinase