Enables kinase binding activity. Involved in trans-synaptic signaling by BDNF, modulating synaptic transmission. Acts upstream of or within several processes, including embryonic placenta development; muscle cell cellular homeostasis; and myoblast differentiation. Located in Schaffer collateral - CA1 synapse and glutamatergic synapse. Is extrinsic component of plasma membrane. Is expressed in early conceptus; embryo; liver; and secondary oocyte. Human ortholog(s) of this gene implicated in COVID-19; conjunctivitis; myocardial infarction; plasminogen deficiency type I; and thrombophilia. Orthologous to several human genes including PLG (plasminogen). [provided by Alliance of Genome Resources, Apr 2022]