The function of SVIL (supervillin, Ensembl gene identifier ENSG00000197321) is as follows. [Isoform 1]: Forms a high-affinity link between the actin cytoskeleton and the membrane. Is among the first costameric proteins to assemble during myogenesis and it contributes to myogenic membrane structure and differentiation (PubMed:12711699). Appears to be involved in myosin II assembly. May modulate myosin II regulation through MLCK during cell spreading, an initial step in cell migration. May play a role in invadopodial function (PubMed:19109420). In addition to its cytoskeletal activities, acts as a cofactor or scaffold for KDM1A, facilitating H3K9me2 demethylation and promoting gene activation, especially in neuronal contexts (PubMed:25684206). {ECO:0000269|PubMed:12711699, ECO:0000269|PubMed:19109420, ECO:0000269|PubMed:25684206}. [Isoform 2]: May be involved in modulation of focal adhesions. Supervillin-mediated down-regulation of focal adhesions involves binding to TRIP6. Plays a role in cytokinesis through KIF14 interaction (By similarity). .