Neuron navigator 1 (NAV1)

Neuron navigator 1 (NAV1) is a cytoskeleton-associated protein predominantly expressed in the nervous system, with additional expression in tissues such as heart and kidney[1][2][4]. NAV1 is a member of the neuron navigator protein family, distinguished structurally by its coiled-coil and AAA+ ATPase domains, and is evolutionarily related to the unc-53 gene of *Caenorhabditis elegans*, known for its role in axon guidance[1][2][4]. NAV1 regulates critical neural processes including neuron migration, axon guidance, and neurite extension, acting chiefly through microtubule plus-end tracking and facilitating interactions with Rho-family GTPases (notably Rac1 and RhoG) to modulate local actin cytoskeleton remodeling[1][2]. NAV1 is especially enriched in the distal tips of neurites and growth cones, where it orchestrates cytoskeletal dynamics in response to extracellular cues, playing a pivotal role in neuronal development and brain morphogenesis[2]. Genetic studies show that NAV1 disruptions and copy number changes are associated with neurodevelopmental disorders, cognitive impairment, and altered responses to psychostimulant drugs such as cocaine in animal models, though it is only rarely implicated in disease directly and does not have an an established role as a therapeutic target[2][3]. The protein has no established small molecule or drug interactions, nor is it used as a clinical biomarker or targeted for therapy, and therefore is not considered a classic therapeutic target (receptor, transporter, enzyme, etc.)[1][2][3][4][5]. NAV1’s fundamental importance lies in cytoskeletal organization during nervous system development, and dysfunction may relate to neurological and psychiatric phenotypes through defects in neuron migration, axon pathfinding, and excitation-inhibition balance in brain circuits[2][3].

Other names

POMFIL3STEERIN1UNC53H1KIAA1151KIAA1213FLJ12560FLJ14203MGC14961steerin-1DKFZp781D0314pore membrane and/or filament-interacting-like protein 3unc-53 homolog 1