Enables several functions, including insulin receptor substrate binding activity; protein C-terminus binding activity; and signaling receptor binding activity. Involved in several processes, including cell surface receptor signaling pathway; positive regulation of protein transport; and regulation of apoptotic process. Located in cytosol; euchromatin; and nucleolus. Is active in glutamatergic synapse and postsynapse. Used to study several diseases, including hyperuricemia; liver disease (multiple); non-alcoholic fatty liver disease; retinal detachment; and thrombocytosis. Biomarker of gastrointestinal system cancer (multiple); heart disease; liver cirrhosis; and obesity. Human ortholog(s) of this gene implicated in several diseases, including gastrointestinal system cancer (multiple); hematologic cancer (multiple); hepatic vascular disease (multiple); inflammatory bowel disease (multiple); and lung non-small cell carcinoma (multiple). Orthologous to human JAK2 (Janus kinase 2). [provided by Alliance of Genome Resources, Apr 2022]