Filament-forming cytoskeletal GTPase (Probable). Involved in the migration of cortical neurons and the formation of neuron leading processes during embryonic development (PubMed:20181826). Plays a role in sperm head formation during spermiogenesis, potentially via facilitating localization of ACTN4 to cell filaments (By similarity). {By
SimilarityUniProtKB:Q6ZU15, Experimental EvidencePubMed:20181826, Curator Inference}.