HER4: a receptor tyrosine kinase of the EGFR family. Specifically binds and is activated by neuregulins, NRG- 2, NRG-3, heparin-binding EGF-like growth factor, betacellulin and NTAK. Heterodimerizes and signals with other EGF receptors. Interaction with these factors induces cell differentiation. Not activated by EGF, TGF-A, and amphiregulin. Interacts with PDZ domains of DLG2, DLG3, DLG4 and the syntrophin SNTB2. Interacts with WWOX. May act as a tumor suppressor: overexpressed in head and neck cancer , but downregulated in renal cancer, papillary carcinoma, high-grade gliomas and invasive breast cancer. 3 alternatively-spliced isoforms of the human protein have been reported.
Protein type: Membrane protein, integral; Kinase, protein; Protein kinase, tyrosine (receptor); Protein kinase, TK; EC 2.7.10.1; TK group; EGFR family
Cellular Component: membrane; mitochondrion; basolateral plasma membrane; cytoplasm; postsynaptic density; plasma membrane; integral to membrane; caveola; nucleus; receptor complex; lipid raft
Molecular Function: transferase activity; protein binding; protein homodimerization activity; protein-tyrosine kinase activity; transferase activity, transferring phosphorus-containing groups; nucleotide binding; transmembrane receptor protein tyrosine kinase activity; kinase activity; receptor signaling protein tyrosine kinase activity; ATP binding; protein kinase activity; epidermal growth factor receptor binding
Biological Process: lactation; synapse maturation; peptidyl-tyrosine phosphorylation; apoptosis; protein amino acid autophosphorylation; positive regulation of transcription, DNA-dependent; multicellular organismal development; heart development; signal transduction; embryonic pattern specification; olfactory bulb interneuron differentiation; protein amino acid phosphorylation; regulation of cell migration; negative regulation of cell proliferation; positive regulation of glucose import; regulation of transcription, DNA-dependent; positive regulation of cell proliferation; neural crest cell migration; positive regulation of cardiac muscle cell proliferation; nervous system development; cell migration; cell fate commitment; transcription, DNA-dependent; positive regulation of synaptic transmission, GABAergic; central nervous system morphogenesis; positive regulation of tyrosine phosphorylation of Stat5 protein; mitochondrial fragmentation during apoptosis; phosphorylation; surfactant homeostasis; positive regulation of epithelial cell proliferation; transmembrane receptor protein tyrosine kinase signaling pathway; negative regulation of apoptosis; positive regulation of cell migration
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