該基因編碼的蛋白質是轉錄調節器叉頭/翼螺旋家族的成員。這種基因的缺陷是導致免疫缺陷的原因：多內分泌疾病、腸病、X連鎖綜合癥（IPEX），也稱為X連鎖自身免疫性免疫缺陷綜合癥。另外，還發現了編碼不同亞型的剪接轉錄變體。
The protein encoded by this gene is a member of the forkhead/winged-helix family of transcriptional regulators. Defects in this gene are the cause of immunodeficiency polyendocrinopathy, enteropathy, X-linked syndrome (IPEX), also known as X-linked autoimmunity-immunodeficiency syndrome. Alternatively spliced transcript variants encoding different isoforms have been identified.