Myosin
Myosin is a molecular motor that converts ATP to energy. Actin is responsible for cell movement and uses energy from the ATP conversion done by myosin..
Actin and myosin
Myosin makes up the THICK filaments, and actin makes up the thin filaments of myofibrils.
The thick filament is composed of the myosin molecule. The thin filament is composed of the actin molecule. Flexing the head of myosin provides the powerstroke.
ATP binds myosin, allowing it to release actin and be in the weak binding state (a lack of ATP makes this step impossible, resulting in the rigor state characteristic of rigor mortis). The myosin then hydrolyzes the ATP and uses the energy to move into the "cocked back" conformation.
Myosin is responsible for actin-based muscular mobility/contraction.
is antagonized by the actions of myosin phosphatase
myosin crossbridge binding
Myosin
The two muscle filaments are Myosin and Actin. Myosin is the thicker of the two. When a muscle contracts, a hook like particle extends off the myosin and grabs the actin pulling it in causing the contraction/ tension of the muscle
The release of ADP and P from the myosin heads causes the myosin heads to change shape.