Catalogue number
PKA-335
Synonyms
Epidermal growth factor receptor, EC 2.7.10.1, Receptor tyrosine-protein kinase ErbB-1, ERBB, mENA, ERBB1, EGFR.
Introduction
The epidermal growth factor receptor (EGF R) subfamily of receptor tyrosine kinases comprises four members: EGF R (also known as HER1, ErbB1 or ErbB), ErbB2 (Neu, HER-2), ErbB3 (HER-3), and ErbB4 (HER-4). All family members are type I transmembrane glycoprotein that has an extracellular domain which contains two cysteine-rich domains separated by a spacer region that is involved in ligand-binding, and a cytoplasmic domain which has a membrane-proximal tyrosine kinase domain and a C-terminal tail with multiple tyrosine autophosphorylation sites. The human EGF R gene encodes a 1210 amino acid (aa) residue precursor with a 24 aa putative signal peptide, a 621 aa extracellular domain, a 23 aa transmembrane domain, and a 542 aa cytoplasmic domain. EGF R has been shown to bind a subset of the EGF family ligands, including EGF, amphiregulin, TGF-a , betacellulin, epiregulin, heparin-binding EGF and neuregulin-2 in the absence of a co-receptor. Ligand binding induces EGF R homodimerization as well as heterdimerization with ErbB2, resulting in kinase activation, tyrosine phosphorylation and cell signaling. EGF R can also be recruited to form heterodimers with the ligand-activated ErbB3 or ErbB4. EGF R signaling has been shown to regulate multiple biological functions including cell proliferation, differentiation, motility and apoptosis. In addition, EGF R signaling has also been shown to play a role in carcinogenesis.
Description
EGFR Human Recombinant encoding a.a. 672-1210 expressed in Baculovirus infected Sf9 cells, fused with a GST-tag at N-terminus with thrombin cleavage sites, having a molecular weight of 89,171 Dalton.
EGFR is purified by proprietary chromatographic techniques.
Source
Baculovirus infected Sf9 cells.
Physical Appearance
Sterile filtered liquid.
Formulation
EGFR in 50mM HEPES pH 7.5, 100mM NaCl, 5mM DTT, 15mM reduced glutathione and 20% glycerol.
Stability
Store vial at -20°C to -80°C. When stored at the recommended temperature, this protein is stable for 12 months.
Please avoid freeze-thaw cycles.
Biological Activity
Determination of Km value by Filter binding assay MAFC membrane.
Specific Activity
30 pmol/μgxmin.
Safety Data Sheet
Usage
Prospec's products are furnished for LABORATORY RESEARCH USE ONLY. The product may not be used as drugs, agricultural or pesticidal products, food additives or household chemicals.
