title: 2-Fluoro-ATP, a fluorinated ATP analog. 19F nuclear magnetic resonance studies of the 2-fluoro-ADP . myosin subfragment-1 complex.
abstract: The synthesis of a fluorinated ATP analog, 2-fluoro-ATP (2-flATP), is described. This analog is designed for 19F nuclear magnetic resonance (NMR) studies of large enzymes and proteins which bind adenine nucleotides. 2-flATP is shown to be active as an ATP analog in a number of enzyme systems, and its 19F-NMR properties are determined. Specifically the principal elements of the 19F-NMR chemical shift tensor are shown to be 104, 12, and -116 ppm. The complex between 2-flADP and the myosin subfragment-1 ATPase is studied by 19F NMR, comparing the normal Michaelis complex and 2-flADP "trapped" on subfragment-1. These complexes are shown to be indistinguishable from the standpoint of the environment and mobility of the adenine ring.
mesh_terms: D000244:Adenosine Diphosphate / Q000378:metabolism*; D000255:Adenosine Triphosphate / Q000031:analogs & derivatives* / Q000138:chemical synthesis; D055598:Chemical Phenomena; D002621:Chemistry; D009682:Magnetic Resonance Spectroscopy; D015879:Myosin Subfragments; D009218:Myosins / Q000378:metabolism*; D010446:Peptide Fragments / Q000378:metabolism*
chemical_list: D015879:Myosin Subfragments; D010446:Peptide Fragments; C038022:2-fluoro-ATP; D000244:Adenosine Diphosphate; D000255:Adenosine Triphosphate; D009218:Myosins