MAGT1/SLC58A1, a gene whose loss-of-function mutations cause X-linked immunodeficiency with magnesium defects (XMEN; OMIM: 300853) (Watson et al, 2022), significantly scored together with other parts of the OST complex as phagocytosis regulators in our screen and was previously found as host cell regulators of Legionella pneumophilia (Jeng et al, 2019). This evidence concerns the gene MAGT1 and X-linked immunodeficiency with magnesium defect, Epstein-Barr virus infection and neoplasia.