IGF1R Recombinant Protein

This receptor binds insulin-like growth factor with a high affinity. It has tyrosine kinase activity. The insulin-like growth factor I receptor plays a critical role in transformation events. Cleavage of the precursor generates alpha and beta subunits. It is highly overexpressed in most malignant tissues where it functions as an anti-apoptotic agent by enhancing cell survival. Alternatively spliced transcript variants encoding distinct isoforms have been found for this gene. [provided by RefSeq, May 2014]

IGF1R: a receptor tyrosine kinase that binds insulin-like growth factor 1 (IGF1) with a high affinity and IGF2 with a lower affinity. Functions as an anti-apoptotic agent by enhancing cell survival. Can play a critical role in transformation events. Cleavage of the precursor generates alpha and beta subunits. Tetramer of 2 alpha and 2 beta chains linked by disulfide bonds. The alpha chains contribute to the formation of the ligand- binding domain, while the beta chain carries the kinase domain. Interacts with PIK3R1 and with the PTB/PID domains of IRS1 and SHC1 in vitro when autophosphorylated on tyrosine residues. Mutated in rare cases of pre- and post-natal growth retardation. One SNP associated with increased human longevity. Increased expression of IGF1R and other pathway members associated with progression and malignancy in a range of cancers. Inhibitors: AG1024, AEW541.

Protein type: EC 2.7.10.1; InsR family; Kinase, protein; Membrane protein, integral; Protein kinase, TK; Protein kinase, tyrosine (receptor); TK group

Chromosomal Location of Human Ortholog: 15q26.3

Cellular Component: integral to plasma membrane; intracellular membrane-bound organelle; membrane; plasma membrane; receptor complex

Molecular Function: identical protein binding; insulin binding; insulin receptor binding; insulin receptor substrate binding; insulin-like growth factor binding; insulin-like growth factor I binding; insulin-like growth factor receptor activity; phosphoinositide 3-kinase binding; protein binding; protein-tyrosine kinase activity

Biological Process: immune response; inactivation of MAPKK activity; insulin receptor signaling pathway; insulin-like growth factor receptor signaling pathway; negative regulation of apoptosis; phosphoinositide 3-kinase cascade; phosphoinositide-mediated signaling; positive regulation of cell migration; positive regulation of cell proliferation; positive regulation of DNA replication; protein amino acid autophosphorylation; protein tetramerization; regulation of JNK cascade; signal transduction

Disease: Insulin-like Growth Factor I, Resistance To