actomyosin
Quick Summary
Actomyosin is a complex formed by two proteins, actin and myosin. This complex is crucial for muscle contraction, where it works with ATP to generate force and movement.1
In muscle cells, actin molecules form filaments that interdigitate with myosin filaments. When a muscle receives a signal to contract, myosin acts as a motor, using energy from ATP to slide along the actin filaments. This sliding action shortens the muscle fiber, causing contraction. Proteins like tropomyosin and troponin regulate this interaction in muscle.23
Beyond muscle, actin filaments are also vital components of the cytoskeleton in various cell types, enabling cellular movement and maintaining cell shape.24
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