The main component of the thin filaments in muscle fibres that is responsible for muscle contraction is Actin.
Actin and Myosin both are proteins that are found in muscle tissue. Myosin protein is the thick filaments whereas actin protein is the thin filaments that work together to generate muscle contraction and movement.
Along with the actin, there are some other proteins such as troponin and tropomyosin that forms the thin filament. However, actin plays an important role in the contraction of muscles as each actin molecule consists of a single myosin-binding site.
All actin molecules join together to form a chain twisted into a helix configuration which is important for the contraction mechanism in muscles.
However, actin is the thin filament that plays an important role in the contraction of muscles.
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