| 67703 | Q8BR86 | KIRR3_MOUSE | Kin of IRRE-like protein 3 (Kin of irregular chiasm-like protein 3) (Nephrin-like protein 2) (mKirre) [Cleaved into: Processed kin of IRRE-like protein 3] | DISRUPTION PHENOTYPE | Mice are viable and their size is normal. Mice show defects of the accessory olfactory system characterized by disorganization of the glomerular layer of the posterior accessory olfactory bulb and formation of fewer, larger glomeruli. Mice display a loss of male-male aggression in a resident-intruder assay (PubMed:23637329). Mice display moderate hyperactivity in a familiar, but not novel, environment and defective novel object recognition with normal performances in Morris water maze spatial learning and memory, contextual fear conditioning and extinction, and pattern separation tests (PubMed:26283919). Young mutant mice form fewer synapse-forming structures between dentate granule neurons and GABAergic neurons than normal mice, while the synapses that connect dentate granule neurons to CA3 neurons form normally. This may affect the balance of activity across the two types of dentate granule synapses and the CA3 neurons, leading to hyperactivity (PubMed:26575286). {ECO:0000269|PubMed:23637329, ECO:0000269|PubMed:26283919, ECO:0000269|PubMed:26575286}. |