This protein carries a polyhistidine tag at the C-terminus. The protein has a calculated MW of 104 kDa (single chain), 81 kDa (α subunit) and 23 kDa (β subunit). The protein migrates as 120 kDa, 81 kDa and 35 kDa under reducing (R) condition (SDS-PAGE).
Pureté
>90 % as determined by SDS-PAGE.
Stérilité
0.22 μm filtered
niveau d'endotoxine
Less than 1.0 EU per μg by the LAL method.
Biological Activity Comment
Biological Activity: Measured by its ability to bind human IGF-I in a functional ELISA.
IGF1R
Origine: Humain
Hôte: HEK-293 Cells
Recombinant
The purity of the protein is greater than 85 % as determined by SDS-PAGE and Coomassie blue staining.
No activity loss was observed after storage at: In lyophilized state for 1 year (4 °C-8 °C), After reconstitution under sterile conditions for 1 month (4 °C-8 °C) or 3 months (-20 °C to -70 °C).
The Insulin-like Growth Factor 1 Receptor (IGF1) is also known as CD221, JTK13. and is a transmembrane receptor that is activated by IGF-1 and by the related growth factor IGF-2. It belongs to the large class of tyrosine kinase receptors. This receptor mediates the effects of IGF-1, which is a polypeptide protein hormone similar in molecular structure to insulin. IGF1R is make up of two alpha subunits and two beta subunits ,the Both the α and β subunits are synthesized from a single mRNA precursor. The precursor is then glycosylated, proteolytically cleaved, and crosslinked by cysteine bonds to form a functional transmembrane αβ chain.The α chains are located extracellularly while the β subunit spans the membrane and are responsible for intracellular signal transduction upon ligand stimulation. IGF1R have a binding site for ATP, which is used to provide the phosphates for autophosphorylation. There is a 60 % homology between IGF1R and the insulin receptor. In response to ligand binding, the α chains induce the tyrosine autophosphorylation of the β chains. This event triggers a cascade of intracellular signaling that, while somewhat cell type specific, often promotes cell survival and cell proliferation.