| Post Translational Modifications | Phosphorylated by FAM20C in the extracellular medium. Phosphorylated by CK2.resulting in decreased nuclear localization. |
| Function | Multifunctional protein that plays a critical role in regulating the availability of IGFs such as IGF1 and IGF2 to their receptors and thereby regulates IGF-mediated cellular processes including proliferation, differentiation, and apoptosis in a cell-type specific manner. Also exhibits IGF-independent antiproliferative and apoptotic effects mediated by its receptor TMEM219/IGFBP-3R. Inhibits the positive effect of humanin on insulin sensitivity. Promotes testicular germ cell apoptosis. Acts via LRP-1/alpha2M receptor, also known as TGF-beta type V receptor, to mediate cell growth inhibition independent of IGF1. Mechanistically, induces serine-specific dephosphorylation of IRS1 or IRS2 upon ligation to its receptor, leading to the inhibitory cascade. In the nucleus, interacts with transcription factors such as retinoid X receptor-alpha/RXRA to regulate transcriptional signaling and apoptosis. |
| Protein Name | Insulin-Like Growth Factor-Binding Protein 3Ibp-3Igf-Binding Protein 3Igfbp-3 |
| Database Links | Reactome: R-HSA-381426Reactome: R-HSA-6803211Reactome: R-HSA-8957275 |
| Cellular Localisation | SecretedNucleus |
| Alternative Protein Names | Insulin-Like Growth Factor-Binding Protein 3 proteinIbp-3 proteinIgf-Binding Protein 3 proteinIgfbp-3 proteinIGFBP3 proteinIBP3 protein |
Information sourced from Uniprot.org
