Target
Human NRG1 / Heregulin / Neuregulin
Synonyms
NRG1 | ARIA | GGF | GGF2 | Glial growth factor | Heregulin | HRGA | MSTP131 | NDF | Neu differentiation factor | Neuregulin 1 type IV beta 3 | Neuregulin 1 type IV beta 1a | HRG1 | NRG-1 | SMDF | Neuregulin 1 | Pro-NRG1 | HGL | MST131
Reactivity
Human
(tested or 100% immunogen sequence identity)
Immunogen
Recombinant human Pro-neuregulin-1, membrane-bound isoform protein (75-176AA)
Specificity
Direct ligand for ERBB3 and ERBB4 tyrosine kinase receptors. Concomitantly recruits ERBB1 and ERBB2 coreceptors, resulting in ligand-stimulated tyrosine phosphorylation and activation of the ERBB receptors. The multiple isoforms perform diverse functions such as inducing growth and differentiation of epithelial, glial, neuronal, and skeletal muscle cells; inducing expression of acetylcholine receptor in synaptic vesicles during the formation of the neuromuscular junction; stimulating lobuloalveolar budding and milk production in the mammary gland and inducing differentiation of mammary tumor cells; stimulating Schwann cell proliferation; implication in the development of the myocardium such as trabeculation of the developing heart. Isoform 10 may play a role in motor and sensory neuron development. Binds to ERBB4 (PubMed:10867024, PubMed:7902537). Binds to ERBB3 (PubMed:20682778). Acts as a ligand for integrins and binds (via EGF domain) to integrins ITGAV:ITGB3 or ITGA6:ITGB4. Its binding to integrins and subsequent ternary complex formation with integrins and ERRB3 are essential for NRG1-ERBB signaling. Induces the phosphorylation and activation of MAPK3/ERK1, MAPK1/ERK2 and AKT1 (PubMed:20682778). Ligand-dependent ERBB4 endocytosis is essential for the NRG1-mediated activation of these kinases in neurons (By similarity).