Septin filament complex (SEPT)

Septin filament complexes are highly conserved GTP-binding proteins that assemble into non-polar filaments, rings, and gauzes, representing the fourth component of the cytoskeleton alongside actin, microtubules, and intermediate filaments (Mostowy & Cossart, 2012, Nature Reviews Molecular Cell Biology). They function as molecular scaffolds for protein recruitment and as diffusion barriers that compartmentalize membranes, playing essential roles in cytokinesis, cell polarity, and vesicle trafficking (Spiliotis, 2018, Journal of Cell Science). In clinical oncology, septins like SEPT9 are significant; its DNA methylation is a validated biomarker for the early detection of colorectal cancer (Song & Li, 2017, Medical Science Monitor). Furthermore, dysregulated septin expression is associated with neurodegenerative diseases, such as Alzheimer's and Parkinson's, where they are found in pathological protein aggregates (Zhai et al., 2020, Frontiers in Cell and Developmental Biology). While specific clinical drugs targeting septins are currently limited, small molecules like forchlorfenuron (FCF) are used in research to disrupt septin dynamics, demonstrating their potential as targets for anti-proliferative and anti-metastatic therapies.

Other names

SeptinsSEPT proteinsCytoskeletal septinsGTP-binding proteinsSeptin oligomers

Disruption of septin filament assembly and stabilization of septin-GTP binding to inhibit cytokinesis and scaffold-dependent signaling pathways (Hu et al., 2008, JBC).