The function of ENSG00000164402 (SEPTIN8, septin 8) is as follows. Filament-forming cytoskeletal GTPase (By similarity). May play a role in platelet secretion (PubMed:15116257). Seems to participate in the process of SNARE complex formation in synaptic vesicles (By similarity). {ECO:0000250, ECO:0000250|UniProtKB:B0BNF1, ECO:0000269|PubMed:15116257}. [Isoform 4]: Stabilizes BACE1 protein levels and promotes the sorting and accumulation of BACE1 to the recycling or endosomal compartments, modulating the beta-amyloidogenic processing of APP. .