Cfl1 Protein is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
Gene: CFL1 [1]
UniProt: P23528 [2]
Molecular Weight: ~19 kDa [3]
Subcellular Localization: Cytoskeleton, actin filaments, nucleus [4]
Protein Family: Actin-binding proteins, cofilin family [5]
CFL1 (Cofilin 1), also known as cofilin-1, is a ubiquitously expressed actin-binding protein that plays a critical role in regulating actin filament dynamics. As a member of the cofilin family, CFL1 promotes actin depolymerization and severing, making it essential for cell motility, cytokinesis, neuronal morphogenesis, and synaptic plasticity. In the nervous system, cofilin regulates actin cytoskeleton remodeling necessary for dendritic spine formation, axonal guidance, and neuronal migration during development. CFL1 activity is tightly regulated through phosphorylation by LIM kinase 1 (LIMK1), pH-dependent binding, and phosphoinositide (PIP2) interactions. [6]
Cofilin-1 is a small actin-binding protein (~166 amino acids) with a conserved actin-depolymerizing factor (ADF) domain. The protein contains: [7]
The three-dimensional structure reveals a β-sheet fold with two α-helices, forming a compact globular protein that binds between actin subunits in filamentous actin.
CFL1 promotes actin filament disassembly by:
CFL1 integrates multiple signaling pathways:
In the nucleus, cofilin:
CFL1 is highly expressed in:
Expression is particularly high in regions undergoing active synaptic remodeling.
The study of Cfl1 Protein has evolved significantly over the past decades. Research in this area has revealed important insights into the underlying mechanisms of neurodegeneration and continues to drive therapeutic development.
Historical context and key discoveries in this field have shaped our current understanding and will continue to guide future research directions.
McGough A, Pope B, Chiu W, Weeds A. Cofilin changes the twist of F-actin: implications for actin filament dynamics. Journal of Cell Biology. 1997. ↩︎
Moon HS, et al. Cofilin dysfunction in neuronal and behavioral disorders. Brain Research. 2021. ↩︎
Meng Y, et al. Abnormal actin dynamics in neurons and the cognitive deficits in Alzheimer's disease. Journal of Alzheimer's Disease. 2018. ↩︎
Hotulainen P, Lappalainen P. Stress fibers in neurons: form, function, and regulation. Molecular Biology of the Cell. 2006. ↩︎
Sarmiere PD, Bamburg JR. Regulation of the neuronal actin cytoskeleton by ADF/cofilin. Journal of Neurobiology. 2004. ↩︎
Davis RC, et al. Cofilin phosphorylation and actin dynamics in axonal injury. Brain Research. 2019. ↩︎
Cichon J, et al. Cofilin aggregation blocks intracellular trafficking and induces synaptic loss in hippocampal neurons. Journal of Biological Chemistry. 2012. ↩︎