Kin of IRRE-like protein 3 (Kirrel3)

Synaptic adhesion molecule necessary for the formation of target-specific synapses (PubMed:23637329, PubMed:26575286). Required for formation of target-specific synapses at hippocampal mossy fiber synapses.

Required for formation of mossy fiber filopodia, the synaptic structures connecting dentate granule and GABA neurons. Probably functions as a homophilic adhesion molecule that boosts trans-cellular interactions and stabilize mossy fiber filipodia contact and following synapse formation (PubMed:26575286).