Involved in the regulation of multiple aspects of embryonic and adult neurogenesis (PubMed:17825401, PubMed:19502360, PubMed:31444471). Required for neural progenitor proliferation in the ventrical/subventrical zone during embryonic brain development and in the adult dentate gyrus of the hippocampus (PubMed:17825401, PubMed:19502360). Participates in the Wnt-mediated neural progenitor proliferation as a positive regulator by modulating GSK3B activity and CTNNB1 abundance (PubMed:19303846). Plays a role as a modulator of the AKT-mTOR signaling pathway controlling the tempo of the process of newborn neurons integration during adult neurogenesis, including neuron positioning, dendritic development and synapse formation (PubMed:19778506). Inhibits the activation of AKT-mTOR signaling upon interaction with CCDC88A (PubMed:19778506). Regulates the migration of early-born granule cell precursors toward the dentate gyrus during the hippocampal development (PubMed:19502360). Inhibits ATF4 transcription factor activity in neurons by disrupting ATF4 dimerization and DNA-binding (PubMed:31444471). Plays a role, together with PCNT, in the microtubule network formation (By similarity). Interacts with NDEL1 (PubMed:14962739). Interacts with CCDC88A (via C-terminus); the interaction is direct (PubMed:19778506). Interacts with GSK3B (PubMed:19303846). Interacts with tubulin alpha, ACTN2, ANKHD1, ATF4, ATF5, CEP63, EIF3S3, MAP1A, NDEL1, PAFAH1B1, RANBP9, SPTBN4, SYNE1 and TRAF3IP1 (By similarity). Interaction with microtubules may be mediated in part by TRAF3IP1. Interacts (via C-terminal) with PCNT (By similarity). Interacts with CHCHD6 (By similarity). Interacts with CCDC141 (PubMed:20956536). Interacts with FBXW7, the substrate-recognition component of a SCF (SKP1-CUL1-F-box protein) E3 ubiquitin-protein ligase complex; the interaction targets DISC1 for proteasomal degradation (By similarity). Interacts with ZNF365 (By similarity). Interacts with ATF4; inhibiting ATF4 transcription factor activity by disrupting ATF4 dimerization and DNA-binding (PubMed:31444471). Interacts with PDE4B (By similarity). Colocalizes with NDEL1 in the perinuclear region and the centrosome (PubMed:14962739). Localizes to punctate cytoplasmic foci which overlap in part with mitochondria. Colocalizes with PCNT at the centrosome (By similarity). Expressed in granule cell precursors within the dentate migratory stream during the first week of postnatal life and in differentiated granule cells of the hippocampus (at protein level). Detected in heart, brain, kidney, and testis (PubMed:12504857). Expressed in dentate gyrus, hippocampus and in the olfactory bulb. Expressed in neuronal progenitors residing in the ventricular and subventriculare zones and in postmitotic neurons in the cortical plate of the cerebral cortex at 15 dpc. Expressed in granule cell precursors within the dentate migratory stream of the hippocampus at 19 dpc (at protein level). Ubiquitinated. Ubiquitination with 'Lys-48'-linked polyubiquitin chains leads to its proteasomal degradation. Loss of function of DISC1 in the dentate gyrus of adult mice results in reduced neural progenitor cell proliferation and the appearance of schizophrenic and depressive-like behaviors.