Enables several functions, including SH3 domain binding activity; beta-1 adrenergic receptor binding activity; and enzyme binding activity. Involved in modulation of excitatory postsynaptic potential and positive regulation of synaptic vesicle endocytosis. Located in membrane. Is active in several cellular components, including Schaffer collateral - CA1 synapse; hippocampal mossy fiber to CA3 synapse; and postsynaptic density, intracellular component. Used to study high grade glioma. Human ortholog(s) of this gene implicated in acute myeloid leukemia and high grade glioma. Orthologous to human SH3GL1 (SH3 domain containing GRB2 like 1, endophilin A2). [provided by Alliance of Genome Resources, Apr 2022]