Oncogenic basic amino acid insertions at the extracellular juxtamembrane region of IL7RA cause receptor hypersensitivity

TO THE EDITOR: The receptor for interleukin-7 (IL-7) is formed by the IL7RA and the IL2RG (γc) chains. IL-7 leads to the reciprocal phosphorylation of IL7RA-associated JAK1 and γc-associated JAK3, followed by phosphorylation of IL7RA and then STAT5 anchoring and activation. Constitutive signaling