title: Antibody against 25,000 dalton tryptic fragment of subfragment-1 from chicken skeletal muscle myosin: functional implication of the 25,000 fragment region in subfragment-1.
abstract: Antibody was prepared against the 25,000-dalton tryptic fragment of subfragment-1 from skeletal muscle myosin. The antibody was found to inhibit the Mg2+-ATPase activity and the initial P1-burst of the ATPase. The antibody suppressed the ATP-induced fluorescence enhancement of S-1, though it did not suppress the binding of ATP to S-1. The acto-S-1 ATPase activity was also inhibited by the antibody. These results suggest that there is a site in the 25K fragment region responsible for the transition of the myosin-ATP complex to another high energy complex.
mesh_terms: D000251:Adenosine Triphosphatases / Q000037:antagonists & inhibitors*; D000818:Animals; D000906:Antibodies; D000936:Antigen-Antibody Complex; D017301:Ca(2+) Mg(2+)-ATPase; D002645:Chickens; D007700:Kinetics; D008970:Molecular Weight; D009132:Muscles / Q000378:metabolism*; D015879:Myosin Subfragments; D009218:Myosins / Q000276:immunology / Q000378:metabolism*; D010446:Peptide Fragments / Q000276:immunology / Q000378:metabolism*
chemical_list: D000906:Antibodies; D000936:Antigen-Antibody Complex; D015879:Myosin Subfragments; D010446:Peptide Fragments; D000251:Adenosine Triphosphatases; D017301:Ca(2+) Mg(2+)-ATPase; D009218:Myosins