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Apolipo蛋白 E/APOE3 蛋白
品牌:MedChemExpress (MCE)
货号:HY-P7531
纯度:Greater than 95% as determined by reducing SDS-PAGE.
存储条件:在 -20°C 下可保存 2 年。复溶后,在 4°C 下可稳定保存 1 周,在 -20°C 下可稳定保存更长时间(含载体蛋白)。建议将等分试样在 -20°C 或 -80°C 下冷冻以延长保存时间。
运输条件:美国大陆的室温;其他地方可能有所不同。
产品活性:Apolipoprotein E/ApoE3 是一种介导脂质运输的载脂蛋白亚型,通过结合 LDL receptor (LDLR), LDL receptor-related proteins (LRP1, LRP2, LRP8) 和 Very Low-Density Lipoprotein Receptor (VLDLR) 以及肝素 (Heparin),在血浆和中枢神经中脂质稳态中发挥关键作用。Apolipoprotein E/ApoE3 蛋白, Human (HEK293, His) 是一种重组蛋白,N 端带有一个 His 标签,由 299 个 (K19-H317) 氨基酸组成,在 HEK293 细胞中表达。
生物活性:使用SH-SY5Y细胞进行细胞增殖测定,该作用的ED50为≤17.23ng/mL,对应比活性为≥5.8×104单位/mg。
体外:Apolipoprotein E/ApoE3 (3 μM,24 小时) 在新生大鼠星形胶质细胞 (NRA) 中对 β-Amyloid (1-42) (HY-P1388) 诱导的炎症反应具有一定的保护作用[5]。 Apolipoprotein E/ApoE3 (10 μg/mL,48 小时) 可增强小鼠胚胎成纤维细胞 (MEF) 神经元中 Aβ 合成[7]。
体内:Apolipoprotein E/ApoE3 (Human) 可在转基因 C57BL/6J 小鼠中 (用 hAPOE3 等位基因靶向替代小鼠 Apolipoprotein E 基因) 增强饮食诱导的高胆固醇血症和动脉粥样硬化[6]。 Apolipoprotein E/ApoE3 (Human) 在 hApoE3 转基因小鼠的星形胶质细胞中通过产生高密度脂蛋白 (HDL) 样颗粒将胆固醇释放到胞外[8]。
研究背景:Apolipoprotein E/APOE3 是两亲性分子,既能与脂蛋白颗粒核心的脂质相互作用,也能与血浆的水环境相互作用[3]。 Apolipoprotein E/APOE3 通过与 LDL receptor (LDLR), LDL receptor-related proteins (LRP1, LRP2, LRP8) 和 Very Low-Density Lipoprotein Receptor (VLDLR) 以及肝素 (Heparin) 结合,调控血浆和神经中枢脂质代谢[9][10][12]。 Apolipoprotein E/APOE3 首先通过与 ABCA1 互作,促进 HDL (高密度脂蛋白) 合成,其次将 HDL 从外周组织运送到肝脏,从而清除其中的胆固醇,Apolipoprotein E/APOE3 对调节胆固醇稳态具有重要作用[11]。 Apolipoprotein E/APOE 可以与免疫细胞受体 LILRB4 结合调控免疫反应[13]。 Apolipoprotein E/APOE3 可激活 MAP3K12 和非典型 MAPK 信号转导通路,增强 AP-1 介导的 APP 转录[14]。
种属:Human
标签:C-6*His
蛋白编号:P02649 (K19-H317)
基因 ID:348
同用名:rHuApolipoprotein E, His; ApoE; Apolipoprotein E; APOE3
详情参考:www.medchemexpress.cn/recombinant-proteins/apolipoprotein-e-apoe-protein-human-hek293-his.html
参考文献:
[1]. Gong JS, et al. Apolipoprotein E (ApoE) isoform-dependent lipid release from astrocytes prepared from humanApoE3 and ApoE4 knock-in mice. J Biol Chem. 2002 Aug 16;277(33):29919-26.
[2]. Gong JS, et al. Novel action of apolipoprotein E (ApoE): ApoE isoform specifically inhibits lipid-particle-mediated cholesterol release from neurons. Mol Neurodegener. 2007 May 15;2:9.
[3]. Hatters DM, et al. Apolipoprotein E structure: insights into function. Trends Biochem Sci. 2006 Aug;31(8):445-54.
[4]. Wetterau JR, et al. Human apolipoprotein E3 in aqueous solution. I. Evidence for two structural domains. J Biol Chem.
[5]. Dorey E, et al. Apolipoprotein E Isoforms Differentially Regulate Alzheimer's Disease and Amyloid-β-Induced Inflammatory Response in vivo and in vitro. J Alzheimers Dis. 2017;57(4):1265-1279.
[6]. Sullivan PM, et al. Targeted replacement of the mouse apolipoprotein E gene with the common human APOE3 allele enhances diet-induced hypercholesterolemia and atherosclerosis. J Biol Chem.
[7]. Huang Y W A, et al. ApoE2, ApoE3, and ApoE4 differentially stimulate APP transcription and Aβ secretion[J]. Cell, 2017, 168(3): 427-441. e21.
[8]. Gong J S, et al. Apolipoprotein E (ApoE) isoform-dependent lipid release from astrocytes prepared from human ApoE3 and ApoE4 knock-in mice[J]. Journal of Biological Chemistry, 2002, 277(33): 29919-29926.
[9]. Sehayek E, et al. Mechanisms of inhibition by apolipoprotein C of apolipoprotein E-dependent cellular metabolism of human triglyceride-rich lipoproteins through the low density lipoprotein receptor pathway.
[10]. Kowal RC, et al. Low density lipoprotein receptor-related protein mediates uptake of cholesteryl esters derived from apoprotein E-enriched lipoproteins. Proc Natl Acad Sci U S A. 1989 Aug;86(15):5810-4.
[11]. Ji ZS, et al. Heparan sulfate proteoglycans participate in hepatic lipaseand apolipoprotein E-mediated binding and uptake of plasma lipoproteins, including high density lipoproteins. J Biol Chem.
[12]. Fagan AM, et al. Apolipoprotein E-containing high density lipoprotein promotes neurite outgrowth and is a ligand for the low density lipoprotein receptor-related protein. J Biol Chem. 1996 Nov 22;271(47):30121-5.
[13]. Deng M, et al. LILRB4 signalling in leukaemia cells mediates T cell suppression and tumour infiltration. Nature. 2018 Oct;562(7728):605-609.
[14]. Huang YA, et al. ApoE2, ApoE3, and ApoE4 Differentially Stimulate APP Transcription and Aβ Secretion. Cell. 2017 Jan 26;168(3):427-441.e21.