ID:IRS4_MOUSE DESCRIPTION: RecName: Full=Insulin receptor substrate 4; Short=IRS-4; AltName: Full=Phosphoprotein of 160 kDa; Short=pp160; FUNCTION: Acts as an interface between multiple growth factor receptors possessing tyrosine kinase activity, such as insulin receptor, IGF1R and FGFR1, and a complex network of intracellular signaling molecules containing SH2 domains. Involved in the IGF1R mitogenic signaling pathway. Promotes the AKT1 signaling pathway and BAD phosphorylation during insulin stimulation without activation of RPS6KB1 or the inhibition of apoptosis. Interaction with GRB2 enhances insulin-stimulated mitogen-activated protein kinase activity. May be involved in nonreceptor tyrosine kinase signaling in myoblasts. Plays a pivotal role in the proliferation/differentiation of hepatoblastoma cell through EPHB2 activation upon IGF1 stimulation. May play a role in the signal transduction in response to insulin and to a lesser extent in response to IL4 and GH on mitogenesis. Plays a role in growth, reproduction and glucose homeostasis. May act as negative regulators of the IGFI signaling pathway by suppressing the function of IRS1 and IRS2. SUBUNIT: Interacts with CRK and CRKL. Interaction with CRK is stronger than with CRKL. Interacts with CRK via the phosphorylated YXXM motifs. Interacts with PLC-gamma, SHC1, PTK6, PPP4C and NISCH (By similarity). Interacts with SOCS6 in response to stimulatiom with either insulin or IGF1. Interacts with PIK3R1 and GRB2. SUBCELLULAR LOCATION: Cell membrane; Peripheral membrane protein; Cytoplasmic side. TISSUE SPECIFICITY: Expressed in skeletal muscle, brain, heart, kidney and liver. DEVELOPMENTAL STAGE: First detected from days 15 and 17 embryos. PTM: Phosphorylated on tyrosine residues in response to both insulin and IGF1 signaling. Phosphorylated on Tyr-894 in response to FGF2 signaling. Phosphorylation of Tyr-894 is required for GRB2, phospholipase C-gamma and phosphatidylinositol 3-kinase interaction (By similarity). DISRUPTION PHENOTYPE: Slight defects in growth, reproduction and glucose homeostasis. SIMILARITY: Contains 1 IRS-type PTB domain. SIMILARITY: Contains 1 PH domain. SEQUENCE CAUTION: Sequence=BAC32246.1; Type=Erroneous initiation;
The RNAfold program from the Vienna RNA Package is used to perform the secondary structure predictions and folding calculations. The estimated folding energy is in kcal/mol. The more negative the energy, the more secondary structure the RNA is likely to have.
ModBase Predicted Comparative 3D Structure on Q9Z0Y7
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Orthologous Genes in Other Species
Orthologies between human, mouse, and rat are computed by taking the best BLASTP hit, and filtering out non-syntenic hits. For more distant species reciprocal-best BLASTP hits are used. Note that the absence of an ortholog in the table below may reflect incomplete annotations in the other species rather than a true absence of the orthologous gene.
US Server
Sequence and Links to Tools and Databases 
