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Anti-Sodium Potassium ATPase antibody [EP1845Y] - Plasma Membrane Loading Control

Company: Abcam
Catalog#: ab76020
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Mammalian Cell-derived Vesicles for the Isolation of Organelle Specific Transmembrane Proteins to Conduct Single Molecule Studies
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2018-05-05
[Abstract]  Cell-derived vesicles facilitate the isolation of transmembrane proteins in their physiological membrane maintaining their structural and functional integrity. These vesicles can be generated from different cellular organelles producing, housing, or transporting the proteins. Combined with single-molecule imaging, isolated organelle specific vesicles can be employed to study the trafficking and assembly of the embedded proteins. Here we present a method for organelle specific single molecule imaging via isolation of ER and plasma membrane vesicles from HEK293T cells by employing OptiPrep gradients and nitrogen cavitation. The isolation was validated through Western blotting, and the isolated vesicles were used to perform single molecule studies of oligomeric receptor assembly. [摘要]  细胞衍生的囊泡促进跨膜蛋白在其生理膜中的分离,从而维持其结构和功能完整性。 这些囊泡可以由产生,容纳或运输蛋白质的不同细胞器产生。 结合单分子成像,可以使用分离的细胞器特异性囊泡来研究嵌入蛋白质的运输和组装。 在这里,我们提出了一种通过使用OptiPrep梯度和氮气穴通过从HEK293T细胞中分离ER和质膜囊泡来进行细胞器特异性单分子成像的方法。 通过Western印迹验证分离,并使用分离的囊泡进行寡聚受体组装的单分子研究。

【背景】大量的跨膜蛋白通过多个亚基的组装形成,导致复杂的寡聚结构,其可以通常以多种化学计量存在。了解组装中的变化如何改变在不同细胞器中的贩运和本地化对于确定蛋白质的生理作用以及与成熟和运输相关的疾病的连接至关重要。单分子方法可以通过直接测量其化学计量比来更好地理解寡聚蛋白的组装(Ulbrich和Isacoff,2007; Richards等人,2012)。这种方法避免了整体平均,从而提供了所有化学计量的平均状态(Walter and Bustamante,2014)。单分子研究近来已被用于理解大分子的结构和功能特性,包括构象动力学(Tan等人,2014),离子通道门控(Wang等人 ,2016),配体 - 受体相互作用(Moonschi等人,2015)和化学计量组装(Ulbrich和Isacoff,2007; ...

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