Contributes to genomic stability by preventing telomere dysfunction (PubMed:23776040). Involved in the morphogenesis of basket cells in the somatosensory cortex during embryogenesis (PubMed:23912123). Involved in the positive regulation of oligodendrocyte differentiation during postnatal growth (PubMed:24481677). Involved in dendritic arborization, morphogenesis of spine density dendrite, and establishment of postsynaptic dendrite density in cortical pyramidal neurons (PubMed:25983680). Involved in the regulation of neurogenesis. Negatively regulates neurite outgrowth. Involved in homologous recombination (HR) repair pathway. Required for proper resolution of DNA double-strand breaks (DSBs) by HR. Is required for recovery of stalled replication forks, and directly contributes to genomic stability. Interacts with PARP1 and mediates MRE11-dependent DNA end resection during replication fork recovery (By similarity). Homodimer. Interacts with NDE1 and NDEL1 (By similarity). Interacts with DISC1. Interacts with PARP1 (By similarity). Detected in several tissues, with highest levels in brain. Also expressed during embryonic development. Expressed in cerebral cortex, hippocampus, striatum, inferior colliculus and thalamus (PubMed:23912123). In the embryo at day 14.5 post-coitum, expressed in the basal, medial and lateral ganglionic eminences of the cerebral cortex, but not in the caudal ganglionic eminence (PubMed:23912123). Expressed in the corpus callosum from postnatal day 7 (PD7) to PD56 with a peak at PD14 (PubMed:24481677). Induced by gamma irradiation. Basket cells with reduced branches and short processes in the somatosensory cortex of adult knockout (KO) mice. Reduced expression of the gamma-aminobutyric acid-synthesizing enzymes Gad1 in the somatosensory cortex of KO mice (PubMed:23912123). Delayed myelination in the corpus callosum of KO mice during the postnatal period, but recovery by adulthood (PubMed:24481677). Decreased dendritic arborization and increased spine density dendrites in cortical pyramidal neurons of adult KO mice (PubMed:25983680). Extended N-terminus.