title: Actin may contribute to the power stroke in the binary actomyosin system.
abstract: At the physiological protein osmotic pressure, the angle formed between the long axis of the actin monomer and the pointed end of the filament axis is roughly 61 degrees in F-actin and about 90 degrees in the myosin subfragment 1--decorated F-actin. This implies that, in the course of the contractile cycle, actin itself contributes, by about 4 nm, to the displacement of the actin filament toward the center of the sarcomer.
authors.affiliation: Instituto di Chimica Biologica, Università di Ferrara, Italy.
authors.forename: E
authors.initials: E
authors.lastname: Grazi
authors.forename: E
authors.initials: E
authors.lastname: Magri
authors.forename: C
authors.initials: C
authors.lastname: Schwienbacher
authors.forename: G
authors.initials: G
authors.lastname: Trombetta
mesh_terms: D000199:Actins / Q000502:physiology*; D000205:Actomyosin / Q000502:physiology*; D000818:Animals; D008954:Models, Biological; D009119:Muscle Contraction; D009132:Muscles / Q000502:physiology*; D015879:Myosin Subfragments / Q000502:physiology*; D009997:Osmotic Pressure; D011817:Rabbits; D013314:Stress, Mechanical
chemical_list: D000199:Actins; D015879:Myosin Subfragments; D000205:Actomyosin