The E3 ubiquitin-protein ligase NEDD4 is a Ubl conjugation pathway protein. It contains one HECT (E6AP-type E3 ubiquitin-protein ligase) domain and four WW domains. It is involved in the pathway leading to the degradation of VEGFR-2/KDFR, independently of its ubiquitin-ligase activity. It acts as a potential proto-oncogene that negatively regulates PTEN via ubiquitination, a paradigm analogous to that of Mdm2 and p53. It is also reported to be involved in the budding of many viruses and is the regulator of epithelial Na+ channels, which lead to arterial hypertension. NEDD4 protein is localized to the sarcolemmal region of muscle fibers. Increase in NEDD4 protein expression leads to unloaded and denervated muscles as well as a decrease in Notch1 expression. Hence it acts as down regulator of Notch-1 gene expression.
蛋白别名: Cell proliferation-inducing gene 53 protein; E3 ubiquitin-protein ligase NEDD4; HECT-type E3 ubiquitin transferase NEDD4; NEDD-4; Neural precursor cell expressed developmentally down-regulated protein 4; neural precursor cell expressed, developmentally down-regulated 4, E3 ubiquitin protein ligase; neural precursor cell expressed, developmentally down-regulated gene 4; neural precursor cell expressed, developmentally down-regulated gene 4A; neural precursor cell expressed, developmentally down-regulted gene 4; OTTHUMP00000217840; OTTHUMP00000217841; OTTHUMP00000217842; receptor-potentiating factor 1
基因别名: AA959633; AL023035; AU019897; E430025J12Rik; KIAA0093; mKIAA0093; Nedd-4; NEDD4; NEDD4-1; Nedd4a; PIG53; RPF1
分子生物学功能: ubiquitin-protein ligase