研究方向
NRG1-α 蛋白作为 ERBB3 和 ERBB4 酪氨酸激酶受体的直接配体,同时招募 ERBB1 和 ERBB2 辅助受体,从而诱导配体刺激的酪氨酸磷酸化和 ERBB 受体的激活。其多种亚型的不同功能包括诱导各种细胞类型的生长和分化,包括上皮细胞、神经胶质细胞、神经元细胞和骨骼肌细胞。 NRG1-α 还参与神经肌肉接头形成过程中乙酰胆碱受体的表达、刺激乳腺小叶肺泡出芽和产奶以及诱导乳腺肿瘤细胞分化。此外,它还能刺激雪旺细胞增殖,并在心肌发育中发挥作用,特别是有助于发育中心脏的小梁形成。同工型 10 与运动和感觉神经元发育有关。 NRG1-alpha 与 ERBB4 和 ERBB3 结合,作为整合素的配体,并与整合素和 ERBB3 形成三元复合物,这是 NRG1-ERBB 信号转导中的关键步骤。它诱导 MAPK3/ERK1、MAPK1/ERK2 和 AKT1 的磷酸化和激活。此外,NRG1-alpha 参与配体依赖性 ERBB4 内吞作用,这对于神经元中这些激酶的激活至关重要,并与 LIMK1 的 LIM 结构域区域相互作用。它还与 ERBB3 和整合素 ITGAV:ITGB3 或 ITGA6:ITGB4 形成三元复合物,并与 NRDC 和 BACE1 相互作用。
种属
Human
表达宿主
E. coli
Calculated MW
8.06 kDa
Observed MW
10-15 kDa
标签
No-Tag
纯度
> 92% by SDS-PAGE.
内毒素
< 1EU/μg
制剂
Lyophilized from a 0.22 μm filtered solution of PBS, pH 7.4.
描述
Recombinant Human Pro-neuregulin-1/NRG1(Beta1) Protein is produced by E. coli expression system. The target protein is expressed with sequence (Thr 176-Lys 246) of human Pro-neuregulin-1/NRG1(Beta1) (Accession #NP_039250.2) fused with no additional
储存
Store at -20℃.Store the lyophilized protein at -20℃ to -80 ℃ up to 1 year from the date of receipt.
After reconstitution, the protein solution is stable at -20℃ for 3 months, at 2-8℃ for up to 1 week.
未开盖的干粉蛋白在 -20°C至-80°C可保存12个月;
复溶之后,蛋白溶液在-20°C及以下可保存3个月,在2-8℃可保存1周。
生物活性
Measured in a serum-free cell proliferation assay using MCF-7 human breast cancer cells. The ED50 for this effect is typically 0.62-2.48 ng/mL, corresponding to a specific activity of 4.03×105~1.61×106 units/mg.
复溶
Centrifμge the vial before opening. Reconstitute to a concentration of 0.1-0.5 mg/mL in sterile distilled water. Avoid vortex or vigorously pipetting the protein. For long term storage, it is recommended to add a carrier protein or stablizer (e.g. 0.1% BSA, 5% HSA, 10% FBS or 5% Trehalose), and aliquot the reconstituted protein solution to minimize free-thaw cycles.
收到重组蛋白产品之后请检查蛋白冻干粉末是否贴于瓶底,如果粉末浮起,开盖之前请先低温离心。将蛋白用说明书中指定的缓冲液复溶至0.1-0.5 mg/mL(请注意蛋白复溶浓度不能低于0.1 mg/mL),室温平衡5-10 min保证充分溶解,复溶过程中请不要剧烈涡旋及吹打蛋白溶液。如需长期储存,建议复溶时添加载体蛋白或者稳定剂(如0.1% BSA, 5% HSA, 10% FBS 或者 5% 海藻糖),同时将复溶后的蛋白溶液按照需求进行分装,储存于-20°C至-80°C,随取随用,避免反复冻融。
背景信息
neuregulin-1 (heregulin-1, NRG1) is a member of neuregulin family, which is comprised of four genes thatencode a large number of secreted or membrane-bound isoforms. All family members share an EGF-likedomain that interacts with the ErbB family of tyrosine kinase receptors. NRG1 isoforms can be classified intotype I, type II and type III isoforms. NRG1 directs ligand for ERBB3 and ERBB4 tyrosine kinase receptors,concomitantly recruits ERBB1 and ERBB2 coreceptors, resulting in ligand-stimulated tyrosine phosphorylationand activation of the ERBB receptors. NRG proteins show distinct spatial and temporal expression patterns andplay important roles during development of both the nervous system and the heart.
基因ID
3084
Swiss Prot
Q02297-6(Beta1)
别名
GGF; HGL; HRG; NDF; ARIA; GGF2; HRG1; HRGA; SMDF; MST131; MSTP131; NRG1-IT2;Pro-neuregulin-1;NRG1(Beta1)