MAGI1 and adult T-cell leukemia/lymphoma: Additionally, MAGI1 has been described to bind to the adenoviral E4-ORF1, the high-risk HPV E6 oncoproteins [29], and to Tax1, an oncoprotein encoded by the human T-cell leukemia virus type 1 (HTLV-1), the etiological agent of adult T-cell leukemia (ATL) [30].