ErbB4 / HER4抗体

ErbB4 / HER4抗体产品信息免疫原 : Recombinant Mouse ErbB4 / HER4 protein (Catalog#51064-M08H)

Antibody Type : Rabbit Polyclonal Antibody ( Antibody Purification Platform )
抗体宿主 : Rabbit IgG
缓冲液 : 0.2 μm filtered solution in PBS, 5% trehalose may be added in some batches. Please read the hardcopy of COA or contact our customer service to confirm the formulation.
制备方法 : Produced in rabbits immunized with purified, recombinant Mouse ErbB4 / HER4 (rM ErbB4 / HER4; Catalog#51064-M08H; Q99P91; Met1-Leu652). Total IgG was purified by Protein A affinity chromatography.
ErbB4 / HER4抗体 Background
ErbB4, also known as Her4, is a member of the tyrosine kinase receptors (RTK) and the epidermal growth factor receptor (EGFR) subfamily, and appears to play important roles in differentiation, development and certain carcinomas. It is a single transmembrane-span type I glycoprotein structurally consisting of multiple cysteine rich domains, a transmembrane domain, a tyrosine kinase domain, a phosphotidylinositol-3 (PI-3) kinase binding site and a PDZ domain binding motif. However, the last two domains are absent in one of the two naturally occurring ErbB4 isoforms, ErbB4 CYT-2. ErbB4 ligands include the neuregulins, betacellulin and heparin-binding EGF-like growth factor (HB-EGF). Typically, heterodimerization of ErbB4 with ErbB2 forms the high affinity receptor complex, and subsequnetly transmit cellular signals by activating downstream src homology-2 (SH2) and phosphotyrosine binding (PTB) domain-containing signaling molecules.. ErbB4 undergoes sequential processing by TNF-α converting enzyme (TACE) and presenilin-dependent gamma-secretase to release the ErbB4 ICD (4ICD) with the NLS sequence which is essential for nuclear accumulation of 4ICD. It has been shown that the ligand-indued proteolytic process of ErbB4 results in the accumulation of 4ICD and cytochrome c efflux, and directly couples a cell surface signal to the tumor cell mitochondrial apoptotic pathway. Accordingly, in contrast to the other three members of the EGFR family, ErbB4 expression seems to be selectively lost in tumors with aggressive phenotypes.
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