Involved in several processes, including mast cell degranulation; negative regulation of natural killer cell activation; and positive regulation of natural killer cell cytokine production. Acts upstream of or within transmembrane receptor protein tyrosine kinase signaling pathway. Located in mast cell granule. Part of protein-containing complex. Orthologous to human CLNK (cytokine dependent hematopoietic cell linker). [provided by Alliance of Genome Resources, Apr 2022]