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Acts either as the functional imidazoline-1 receptor (I1R) candidate or as a membrane-associated mediator of the I1R signaling. Binds numerous imidazoline ligands that induces initiation of cell-signaling cascades triggering to cell survival, growth and migration. Its activation by the agonist rilmenidine induces an increase in phosphorylation of mitogen-activated protein kinases MAPK1 and MAPK3 in rostral ventrolateral medulla (RVLM) neurons that exhibited rilmenidine-evoked hypotension By similarity. Blocking its activation with efaroxan abolished rilmenidine-induced mitogen-activated protein kinase phosphorylation in RVLM neurons By similarity. Acts as a modulator of Rac-regulated signal transduction pathways By similarity. Suppresses Rac1-stimulated cell migration by interacting with PAK1 and inhibiting its kinase activity By similarity. Also blocks Pak-independent Rac signaling by interacting with RAC1 and inhibiting Rac1-stimulated NF-kB response element and cyclin D1 promoter activation By similarity. Inhibits also LIMK1 kinase activity by reducing LIMK1 'Tyr-508' phosphorylation By similarity. Inhibits Rac-induced cell migration and invasion in breast and colon epithelial cells By similarity. Inhibits lamellipodia formation, when overexpressed By similarity. Plays a role in protection against apoptosis. Involved in association with IRS4 in the enhancement of insulin activation of MAPK1 and MAPK3. When overexpressed, induces a redistribution of cell surface ITGA5 integrin to intracellular endosomal structures.
Gene Name: | nischarin |
Synonyms: | NISCH, HIRAS, I-1, I-1 receptor candidate protein, Imidazoline receptor candidate, Imidazoline receptor 1, IRAS, KIAA0975, IR1, Nischarin, I1R, I1R candidate protein, Imidazoline-1 receptor |
Target Sequences: | NM_007184 NP_009115.2 Q9Y2I1 |
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