Nischarin - Q9Y2I1 (NISCH_HUMAN)


Protein Feature View of PDB entries mapped to a UniProtKB sequence  

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. UniProt
Pathway Maps
      ESCHER  BiGG
Subunit Structure
Homooligomer. Interacts with GRB2. Interacts with PIK3R1; probably associates with the PI3-kinase complex. Interacts with IRS4. Found in a complex with ITGA5 and PAK1. Found in a complex with LIMK1 and PAK1. Interacts with ITGA5 (via cytoplasmic domain); this interaction is direct. Interacts with PAK1 (via kinase domain); this interaction is direct and is increased upon activation of PAK1 (By similarity). Interacts with LIMK1 (via PDZ and kinase domain); this interaction is direct (By similarity). Interacts with LIMK2; this interaction depends on LIMK2 activity (By similarity). Interacts with RAC1 (activated state) (By similarity). Interacts with STK11; this interaction may increase STK11 activity. UniProt
Both the presence of the PX domain and the coiled coil region are necessary for its endosomal targeting. UniProt
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The PDB to UniProt mapping is based on the data provided by the EBI SIFTS project. See also Velankar et al., Nucleic Acids Research 33, D262-265 (2005).
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