SEPTIN7 is a GTP-binding cytoskeletal protein that functions as a core component of septin filaments, essential for organizing the actin cytoskeleton and maintaining cellular architecture 1. Primary functions include regulating mitosis progression, cytokinesis, and ciliogenesis through formation of heteromeric filament complexes with other septins 2. SEPTIN7 participates in multivesicular body biogenesis by coordinating AP-3 adapter and ESCRT protein sorting machinery on endosomal membranes 3, and is critical for plasma membrane repair by organizing submembranous actomyosin domains containing F-actin, myosin IIA, and annexin A2 4. The protein exhibits anti-apoptotic properties through caspase-independent pathways 5. In skeletal muscle, SEPTIN7 is indispensable for proper myofiber architecture, mitochondrial organization, and force generation, with conditional knockdown causing skeletal deformities and impaired differentiation 1. Metabolically, adipocyte SEPTIN7 restricts store-operated calcium entry and suppresses obesogenic adipogenesis while promoting lipolysis, suggesting a protective role against diet-induced obesity 6. Dysregulation of SEPTIN7 has been implicated in ischemic acute kidney injury pathogenesis 7. Post-translational modification through PKA-mediated phosphorylation at Thr197 disrupts septin filament dynamics and impairs ciliogenesis 2, representing a regulatory mechanism for SEPTIN7 function.