F-actin cytoskeleton regulator

F-actin cytoskeleton regulators comprise a diverse functional class of proteins that govern the assembly, disassembly, and spatial organization of filamentous actin (F-actin) within cells. This group includes signaling molecules such as Rho GTPases (e.g., RhoA, Rac1, Cdc42), effector enzymes like Rho-associated protein kinase (ROCK), and structural or scaffolding proteins such as the Arp2/3 complex, formins, and various actin-binding proteins like LIM and SH3 domain protein 1 (LASP1) and Espin. These regulators are essential for fundamental cellular processes, including cell migration, shape maintenance, cytokinesis, and intracellular transport. Dysregulation of these proteins is a hallmark of cancer metastasis, where they facilitate the formation of invasive structures like lamellipodia and invadopodia, and they are also implicated in cardiovascular and neurodegenerative disorders. While the ubiquitous nature of the actin cytoskeleton makes it a challenging therapeutic target, specific regulators like ROCK have been successfully targeted by drugs such as fasudil and ripasudil for conditions like glaucoma and cerebral vasospasm.

Other names

Actin cytoskeleton regulatorActin-binding proteinActin-regulatory proteinF-actin regulator

Inhibition of Rho-associated protein kinase (ROCK), inhibition of the Arp2/3 complex, inhibition of formins, and direct modulation of actin polymerization or stabilization.