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New insights into the regulation of the actin cytoskeleton by tropomyosin Wang CL; Coluccio LMInt Rev Cell Mol Biol 2010[]; 281 (ä): 91-128The actin cytoskeleton is regulated by a variety of actin-binding proteins including those constituting the tropomyosin family. Tropomyosins are coiled-coil dimers that bind along the length of actin filaments. In muscles, tropomyosin regulates the interaction of actin-containing thin filaments with myosin-containing thick filaments to allow contraction. In nonmuscle cells where multiple tropomyosin isoforms are expressed, tropomyosins participate in a number of cellular events involving the cytoskeleton. This chapter reviews the current state of the literature regarding tropomyosin structure and function and discusses the evidence that tropomyosins play a role in regulating actin assembly.|Actins/*physiology[MESH]|Amino Acid Sequence[MESH]|Animals[MESH]|Calmodulin-Binding Proteins/physiology[MESH]|Cell Membrane/physiology[MESH]|Cytoskeleton/*physiology[MESH]|Humans[MESH]|Molecular Motor Proteins/physiology[MESH]|Molecular Sequence Data[MESH]|Muscle Contraction/physiology[MESH]|Myosins/physiology[MESH]|Neoplasm Metastasis/physiopathology[MESH]|Phosphorylation[MESH]|Protein Isoforms/chemistry/genetics/physiology[MESH]|Tropomyosin/chemistry/genetics/*physiology[MESH] |
