Enables Hsp90 protein binding activity; protein tyrosine kinase activity; and ubiquitin protein ligase binding activity. Involved in several processes, including ERBB2-ERBB4 signaling pathway; nervous system development; and positive regulation of intracellular signal transduction. Located in several cellular components, including basolateral plasma membrane; lateral loop; and postsynaptic membrane. Biomarker of congestive heart failure and median neuropathy. Human ortholog(s) of this gene implicated in several diseases, including lung cancer (multiple); mammary Paget's disease; reproductive organ cancer (multiple); stomach cancer; and urinary system cancer (multiple). Orthologous to human ERBB2 (erb-
b2 receptor tyrosine kinase 2); PARTICIPATES IN mitogen activated protein kinase signaling pathway; Ras mediated signaling pathway; altered epidermal growth factor/neuregulin signaling pathway; INTERACTS WITH 2,3,7,8-tetrachlorodibenzodioxine; 2-acetamidofluorene; 3,3',5,5'-tetrabromobisphenol A.