title: [Effect of medium viscosity on the activity of myosin ATPase].
abstract: The influence of increased medium viscosity on the activity of myosin Ca2+-ATPase has been studied in 28, 45 and 60% water-sucrose solutions at 25 degrees C. In the wide range of viscosities (10 divided by 430 mp) the rate constant of ATP hydrolysis displays the negative power-law dependence on solution viscosity with an index approximately -0,5. The obtained data confirm an idea about the existence of direct connection between the low-frequency liquid relaxations and structural dynamics of proteins and enzymes.
mesh_terms: D000251:Adenosine Triphosphatases / Q000378:metabolism*; D000255:Adenosine Triphosphate / Q000378:metabolism; D000818:Animals; D006868:Hydrolysis; D066298:In Vitro Techniques; D007700:Kinetics; D009132:Muscles / Q000201:enzymology; D011487:Protein Conformation; D011817:Rabbits; D012996:Solutions; D014783:Viscosity
chemical_list: D012996:Solutions; D000255:Adenosine Triphosphate; D000251:Adenosine Triphosphatases
vernacular_title: Vliianie viazkosti sredy na aktivnost' miozinovoĭ ATFazy.