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Activates HECT domain-containing E3 ubiquitin-protein ligases, including ITCH, NEDD4, NEDD4L, SMURF2, WWP1 and WWP2, and consequently modulates the stability of their targets. As a result, may control many cellular processes. Recruits ITCH, NEDD4 and SMURF2 to endosomal membranes. Negatively regulates KCNH2 potassium channel activity by decreasing its cell-surface expression and interfering with channel maturation through recruitment of NEDD4L to the Golgi apparatus and multivesicular body where it mediates KCNH2 degradation (PubMed:26363003). May modulate EGFR signaling. Together with NDFIP1, limits the cytokine signaling and expansion of effector Th2 T-cells by promoting degradation of JAK1, probably by ITCH- and NEDD4L-mediated ubiquitination. [UniProt]
0710001O20Rik; 2810436B12Rik; 9130207N19Rik; KIAA1165; MAPK-activating protein PM04 PM05 PM06 PM07; mKIAA1165; N4wbp5a; NDFIP2; Nedd4 family interacting protein 2; NEDD4 family-interacting protein 2; NEDD4 WW domain-binding protein 5A; NF-kappa-B-activating protein 413; putative MAPK-activating protein PM04/PM05/PM06/PM07; Putative NF-kappa-B-activating protein 413; Unknown (protein for IMAGE:7958216); wu:fa92h03; wu:fk31f07; zgc:63948
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