NDFIP1: Activates HECT domain-containing E3 ubiquitin-protein ligases, including NEDD4 and ITCH, and consequently modulates the stability of their targets. As a result, controls many cellular processes. Prevents chronic T-helper cells-mediated inflammation by activating ITCH and thus controlling JUNB degradation. In cortical neurons, mediates the ubiquitination of SLC11A2/DMT1 by NEDD4L, leading to down-regulation of the divalent metal transporter and protection of the cells from cobalt and iron toxicity. Modulates EGFR signaling through multiple pathways. In particular, may regulate the ratio of AKT1-to-MAPK8 signaling in response to EGF, acting on AKT1 probably through PTEN destabilization and on MAPK8 through ITCH-dependent MAP2K4 inactivation. As a result, may control cell growth rate. 2 isoforms of the human protein are produced by alternative splicing.
Protein type: Adaptor/scaffold; Membrane protein, multi-pass; Membrane protein, integral
Chromosomal Location of Human Ortholog: 5q31.3
Cellular Component: Golgi membrane; perinuclear region of cytoplasm; extracellular region; integral to membrane; endosome membrane; cell cortex
Molecular Function: signal transducer activity; protein binding; WW domain binding
Biological Process: negative regulation of interleukin-4 production; positive regulation of I-kappaB kinase/NF-kappaB cascade; ubiquitin-dependent protein catabolic process via the multivesicular body pathway; cellular iron ion homeostasis; regulation of lymphocyte differentiation; regulation of myeloid leukocyte differentiation; signal transduction; negative regulation of isotype switching to IgE isotypes; negative regulation of T cell proliferation; negative regulation of T-helper 2 type immune response; positive regulation of protein ubiquitination; negative regulation of inflammatory response; positive regulation of protein catabolic process; negative regulation of protein transport; regulation of isotype switching to IgG isotypes; negative regulation of transporter activity
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