title: A high-affinity ATP-binding site on 30S dynein.
abstract: The enhancing effect of low concentrations (eg, 8 microM) of bis(4-fluoro-3-nitrophenyl)sulfone (FNS) on 30S dynein ATPase activity is increased when 1 mM dithiothreitol (DTT) is present. The effect of FNS + DTT is optimal at pH 7.5. Activation of the latent ATPase activity of 30S dynein by FNS + DTT is partially prevented by 1--3 microM ATP. Adenylylimidodiphosphate (AMP-PNP) is less effective than ATP, while beta, gamma-methylene-adenosine triphosphase (AMP-PCP), though a much stronger inhibitor of ATPase activity than AMP-PNP, does not protect against enhancement. These results demonstrate the presence of high-affinity ATP-binding site on 30S dynein.
mesh_terms: D000251:Adenosine Triphosphatases / Q000378:metabolism*; D000255:Adenosine Triphosphate / Q000031:analogs & derivatives / Q000378:metabolism* / Q000494:pharmacology; D000266:Adenylyl Imidodiphosphate / Q000494:pharmacology; D001665:Binding Sites; D004229:Dithiothreitol / Q000494:pharmacology; D004347:Drug Interactions; D004398:Dyneins / Q000378:metabolism*; D004789:Enzyme Activation; D013450:Sulfones / Q000494:pharmacology; D013769:Tetrahymena pyriformis / Q000201:enzymology
chemical_list: D013450:Sulfones; D000266:Adenylyl Imidodiphosphate; D000255:Adenosine Triphosphate; D000251:Adenosine Triphosphatases; D004398:Dyneins; D004229:Dithiothreitol