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Department of Molecular Microbiology and Immunology, Brown University
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Terrizzi, S. C., Banh, C., Brossay, L. A Protocol for the Production of KLRG1 Tetramer. J. Vis. Exp. (35), e1701, doi:10.3791/1701 (2010).
杀伤细胞凝集素样受体G1(KLRG1)是II型跨膜糖蛋白抑制性受体,属于C型凝集素样超家族。 KLRG1存在单体和二硫键相连的二聚体。这种保守的受体上最成熟,最近激活NK细胞,以及效应/记忆性T细胞的一个子集。
使用KLRG1四聚体,以及其他的方法,E,N,和R -钙粘素被确定为KLRG1配体。这些CA 2 +依赖的细胞,细胞粘附分子由胞外域包含五个cadherin的细胞间的相互作用,跨膜结构域和细胞质域与肌动蛋白细胞骨架的重复。
KLRG1四聚体的生成,是必不可少的KLRG1配体的识别。 KLRG1四聚体,也是一个独特的工具,以澄清在调节免疫反应和组织的完整性的作用cadherin和KLRG1发挥。
包涵体的制备
复性KLRG1
浓度的复性反应
KLRG1四聚体的纯化
代表性的成果
AKTA FPLC尺寸排阻色谱图1。代表从积极的成果复性KLRG1。图表显示分离(83.52毫升)的单体,二聚体(56.36毫升),和multimer(36.26毫升)的复性KLRG1形式。 94.25毫升峰代表缓冲区交换。
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在这个协议中,它是如何净化,biotinylate,tetramerize KLRG1。 KLRG1四聚体可以用来标记流式细胞仪KLRG1配体。虽然复性条件进行测试,每个蛋白质的经验,其他的C型凝集素可tetramerized使用了类似的协议。使用tetramerized蛋白作为探针,对孤儿的C型凝集素受体的配体可能被确定。
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我们感谢博士Naidenko优化复性条件的帮助。这项工作是支持由美国国立卫生研究院的研究经费AI58181洛朗Brossay。辛迪迪班是由美国国立卫生研究院NRSA F31 AI080230支持。
斯蒂芬妮Terrizzi和辛迪迪班平等作出贡献,对这项工作。
| Name | Type | Company | Catalog Number | Comments |
| BirA Enzyme and Buffer | Biotinylation Kit | Avidity | BIRA500 | |
| Complete Mini Protease Inhibitor Tablets, EDTA Free | Reagent | Roche Group | 11 836 170 001 | or equivalent |
| Amicon Stirred Cell | Equipment | EMD Millipore | Model #8400 | or equivalent |
| YM10 NMWL 10K ultrafiltration membrane | Filtration Supply | EMD Millipore | 13642 | |
| 15 ml YM10 concentrator | Filtration Supply | EMD Millipore | 4411 | |
| AKTAFPLC | Equipment | GE Healthcare | 18-1900-26 | |
| Sephacryl S-200 16/60 high-resolution column | Equipment | GE Healthcare | 17-1166-01 | |
| Strepavidin PE | Reagent | BD Biosciences | 554061 | or equivalent |
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ReplyPosted by: Kyungeun KimApril 14, 2010, 12:18 PM