HER2/CD340 蛋白, Human (HEK293, His)

The HER2/CD340 protein is a dynamic tyrosine kinase that is essential in the neuregulin receptor complex and regulates microtubule dynamics. Upon activation, it triggers the MEMO1-RHOA-DIAPH1 pathway, inhibits GSK3B and promotes the association of APC and CLASP2 on the cell membrane to achieve microtubule stabilization. HER2/CD340 Protein, Human (HEK293, His) is the recombinant human-derived HER2/CD340 protein, expressed by HEK293 , with C-6*His labeled tag.

HER2/CD340 蛋白是一种动态蛋白酪氨酸激酶，是多种细胞表面受体复合物中的关键成分，需要辅助受体来实现有效的配体结合。至关重要的是，它作为神经调节蛋白受体复合物的一部分发挥着不可或缺的作用，GP30 被确定为该受体的潜在配体。除了其受体功能外，HER2/CD340 蛋白还复杂地调节外周微管 (MT) 的生长和稳定。激活后，由 ERBB2 激活启动的 MEMO1-RHOA-DIAPH1 信号通路会协调细胞膜上 GSK3B 的磷酸化和随后的抑制。这种策略性抑制可防止 APC 和 CLASP2 的磷酸化，促进它们与细胞膜的结合。值得注意的是，膜结合的 APC 能够将 MACF1 定位到细胞膜上，这是微管捕获和稳定的先决条件。在细胞核内，HER2/CD340 蛋白积极参与转录调控，与 PTGS2/COX-2 启动子中的 5'-TCAAATTC-3' 序列结合以激活转录。此外，它通过 RNA Pol I 参与 rRNA 基因的转录，增强了蛋白质合成，有助于整体细胞生长。HER2/CD340 蛋白的多方面活性强调了其在协调不同细胞过程（从受体信号传导到微管动力学和转录调节）中的核心作用。

1.Loaded Anti-Human HER2 mAb-Fc on Protein A Biosensor, can bind Human HER2-His with an affinity constant of 1.36 nM as determined in BLI assay.
2.Measured by its ability to block anti-ErbB2 mediated inhibition of SK-BR-3 human breast cancer cell proliferation. The ED₅₀ this effect is ≤1 μg/mL in the presence of 0.6 µg/mL Trastuzmab, corresponding to a specific activity is ≥1.×10³ units/mg.

Human

HEK293

C-6*His

P04626-1 (T23-T652)

2064  [NCBI]

TQVCTGTDMKLRLPASPETHLDMLRHLYQGCQVVQGNLELTYLPTNASLSFLQDIQEVQGYVLIAHNQVRQVPLQRLRIVRGTQLFEDNYALAVLDNGDPLNNTTPVTGASPGGLRELQLRSLTEILKGGVLIQRNPQLCYQDTILWKDIFHKNNQLALTLIDTNRSRACHPCSPMCKGSRCWGESSEDCQSLTRTVCAGGCARCKGPLPTDCCHEQCAAGCTGPKHSDCLACLHFNHSGICELHCPALVTYNTDTFESMPNPEGRYTFGASCVTACPYNYLSTDVGSCTLVCPLHNQEVTAEDGTQRCEKCSKPCARVCYGLGMEHLREVRAVTSANIQEFAGCKKIFGSLAFLPESFDGDPASNTAPLQPEQLQVFETLEEITGYLYISAWPDSLPDLSVFQNLQVIRGRILHNGAYSLTLQGLGISWLGLRSLRELGSGLALIHHNTHLCFVHTVPWDQLFRNPHQALLHTANRPEDECVGEGLACHQLCARGHCWGPGPTQCVNCSQFLRGQECVEECRVLQGLPREYVNARHCLPCHPECQPQNGSVTCFGPEADQCVACAHYKDPPFCVARCPSGVKPDLSYMPIWKFPDEEGACQPCPINCTHSCVDLDDKGCPAEQRASPLT

88-120 kDa

• 
  Greater than 90% as determined by reducing SDS-PAGE.

无菌粉末

Lyophilized from a 0.2 μm filtered solution of PBS, pH 7.4 or 20 mM PB, 150 mM NaCl, pH 7.4.

<1 EU/μg, determined by LAL method.

It is not recommended to reconstitute to a concentration less than 100 μg/mL in ddH₂O. For long term storage it is recommended to add a carrier protein (0.1% BSA, 5% HSA, 10% FBS or 5% Trehalose).

Stored at -20°C for 2 years. After reconstitution, it is stable at 4°C for 1 week or -20°C for longer (with carrier protein). It is recommended to freeze aliquots at -20°C or -80°C for extended storage.

Room temperature in continental US; may vary elsewhere.