E3 ubiquitin-protein ligase that plays an important role in neuronal differentiation, including neurogenesis and gliogenesis, during brain development. During embryonic development initiates neuronal differentiation by inducing cell cycle arrest at the G0/G1 phase through up-regulation of cell-cycle regulatory proteins . Plays a role not only in the fetal period during the development of the nervous system, but also in the adult brain, where it is involved in the maintenance of neural functions and protection of the nervous tissue cells from oxidative stress-induced damage. Exhibits GTPase and E3 ubiquitin-protein ligase activities. Regulates dendritic spine density and synaptic neurotransmission; its ability to hydrolyze GTP is involved in the maintenance of dendritic spine density (By similarity).
Subcellular locations: Membrane, Membrane, Cytoplasm, Nucleus, Nucleus, Nuclear body, Nucleus, Nucleoplasm, Endosome, Cytoplasmic vesicle, Secretory vesicle, Synaptic vesicle, Postsynaptic density, Perikaryon, Cell projection, Neuron projection
Predominantly in the nucleus, but some amounts were also found in the cytoplasm. Oxidative stress stimulates its shuttling from the cytoplasm into the nucleus. Recruited to nuclear bodies via its interaction with ZBTB16. Localizes to the cell soma and neuritis and only slightly to the nucleus in the neurons of most brain areas.
Predominantly expressed in brain . Decreased expression in glioma brain tumors as compared to normal brains (at protein level) .