mikrofilamentide

Mikrofilaments are a type of cytoskeletal filament found in eukaryotic cells. They are composed of actin, a globular protein that polymerizes into a helical structure. Mikrofilaments play a crucial role in various cellular processes, including cell movement, shape changes, and division. They are involved in the formation of lamellipodia and filopodia, which are extensions of the cell membrane that facilitate cell migration and adhesion to other cells or the extracellular matrix. Additionally, mikrofilaments contribute to the maintenance of cell structure and integrity by providing a framework for the cell's internal organization. They are also essential for muscle contraction in non-muscle cells, where they generate forces that drive cellular activities. The dynamics of mikrofilaments are regulated by a variety of proteins, including actin-binding proteins and actin-modifying enzymes, which control their assembly, disassembly, and organization within the cell.