Predicted to enable collagen binding activity. Involved in several processes, including protein localization to secretory granule; protein processing; and regulation of postsynapse organization. Located in several cellular components, including Schaffer collateral - CA1 synapse; mast cell granule; and postsynaptic specialization, intracellular component. Is expressed in several structures, including autopod; central nervous system; liver; lower jaw; and thymus primordium. Orthologous to human SRGN (serglycin). [provided by Alliance of Genome Resources, Apr 2022]