Enables MAP kinase kinase activity. Involved in several processes, including cellular response to sorbitol; positive regulation of macromolecule metabolic process; and response to ischemia. Predicted to be located in cytosol and nucleoplasm. Human ortholog(s) of this gene implicated in Pick's disease; cervical cancer; ovarian carcinoma; progressive supranuclear palsy; and restrictive cardiomyopathy. Orthologous to human MAP2K6 (mitogen-activated protein kinase kinase 6). [provided by Alliance of Genome Resources, Apr 2022]