Enables vitamin E binding activity. Involved in several processes, including intracellular pH reduction; response to pH; and vitamin E metabolic process. Located in cytosol and late endosome. Biomarker of liver benign neoplasm. Human ortholog(s) of this gene implicated in familial isolated deficiency of vitamin E. Orthologous to human TTPA (alpha tocopherol transfer protein). [provided by Alliance of Genome Resources, Apr 2022]