Recombinant Human Heregulinβ-1

Neuregulin / Heregulin家庭结构相关的多肽生长因子来自或者基因(NRG1、NRG2 NRG3和NRG4)。迄今为止,有超过14可溶性和跨膜蛋白来自NRG1基因。heterodimerization erb2,激发内在的激酶活性,从而导致酪氨酸磷酸化。重组体人Heregulin-β1(HRG1-B1)是7.5 kDa多肽组成的只有EGF Heregulin-β1。

一.产品名称：Recombinant Human Heregulinβ-1

二.Catalog Number:AF-100-03

三.Synonyms:Neuregulin1 (NRG1-β1), Neu differentiation factor (rat)

四.Description:

Neuregulin/Heregulin is a family of structurally related polypeptide growth factors derived from alternatively spliced genes (NRG1, NRG2, NRG3 and NRG4). To date, there are over 14 soluble and transmembrane proteins derived from the NRG1 gene. Proteolytic processing of the extracellular domain of the transmembrane NRG1 isoforms release soluble growth factors. HRG1-β1 contains an Ig domain and an EGF-like domain that is necessary for direct binding to receptor tyrosine kinases erb3 and erb4. This binding induces erb3 and erb4 heterodimerization with erb2, stimulating intrinsic kinase activity, which leads to tyrosine phosphorylation. Although HRG1-β1 biological effects is still unclear, it has been found to promote motility and invasiveness of breast cancer cells which may also involve up-regulation of expression and function of the autocrine motility-promoting factor (AMF). Recombinant human Heregulin-β1 (HRG1-B1) is a 7.5 kDa polypeptide consisting of only the EGF domain of heregulin-β1 (65 amino acid residues). Manufactured using all non-animal reagents.

五.AA Sequence:

SHLVKCAEKE KTFCVNGGEC FMVKDLSNPS RYLCKCPNEF TGDRCQNYVM ASFYKHLGIE FMEAE

六.Source:E.coli

七.Purity:Greater than 98% by SDS-PAGE gel and HPLC analyses.

八.Biological Activity:

The ED₅₀ was determined by the dose-dependent stimulation of the proliferation of human MCF-7 cells is ≤ 0.5 ng/ml, corresponding to a specific activity of ≥ 2 x 10⁶ units/mg.

九.Cross Reactivity:Rat, Human, Mouse