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PageRuler Prestained Protein Ladder

Company: Thermo Scientific
Catalog#: 26619
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Expression and Purification of Yeast-derived GPCR, Gα and Gβγ Subunits for Structural and Dynamic Studies
Author:
Date:
2021-02-20
[Abstract]  

In the last several years, as evidence of a surged number of GPCR-G complex structures, the expressions of GPCRs and G proteins for structural biology have achieved tremendous successes, mostly in insect and mammalian cell systems, resulting in more than 370 structures of over 70 GPCRs have been resolved. However, the challenge remains, particularly in the conformational transition and dynamics study area where a much higher quantity of the receptors and G proteins is required even in comparison to X-ray and cryo-EM (5 mg/ml, 3 μl/sample) when NMR spectroscopy (5 mg/ml, 250 μl /sample) is applied. As a result, the expression levels of the insect and mammalian systems are also difficult to meet this demand, not to mention the prohibitive cost of producing GPCRs and G proteins using

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[摘要]  [摘要]在过去的几年中,作为GPCR-G复杂结构数量激增的证据,用于结构生物学的GPCR和G蛋白的表达已取得了巨大的成功,主要是在昆虫和哺乳动物细胞系统中,导致了370多个已解决了70多个GPCR的结构。但是,挑战仍然存在,特别是在构象转变和动力学研究领域,即使与X射线和冷冻EM相比(5 mg / ml,3μl /样品),也需要大量的受体和G蛋白。当应用NMR光谱法(5 mg / ml,250μl /样品)时。结果,i的表达水平 nsect和哺乳动物系统也很难满足这一需求,更不用说使用绝大多数系统使用这些系统生产GPCR和G蛋白的成本高昂了。因此,需要探索一种具有广泛适用性的有效,负担得起的实用方法。毕赤酵母表达系统已在GPCR制备中显示出其希望,并具有其他真核表达系统无法比拟的许多优点。在该系统中表达的GPCR价格便宜,易于操作,并且能够进行同位素标记。在此,我们提出最近开发并在我们的实验室升级的相关协议,包括表达和纯化的毕赤酵母衍生GPCR以G沿α和G βγ蛋白。我们预期这些协议将促进GPCR及其复合物的构象转变和动力学研究。


[背景] G蛋白偶联受体(GPCR)是最大的膜蛋白家族,在许多(病理)生理活动中起着关键作用。GPCR的或它们的效应物的功能障碍会导致各种病症,包括神经变性疾病,癌症,和慢性炎症(Overington等人,2006) ...

Differential Fractionation of Erythrocytes Infected by Plasmodium berghei
Author:
Date:
2020-06-05
[Abstract]  The study of host/pathogen interactions at the cellular level during Plasmodium intra-erythrocytic cycle requires differential extraction techniques aiming to analyze the different compartments of the infected cell. Various protocols have been proposed in the literature to study specific compartments and/or membranes in the infected erythrocyte. The task remains delicate despite the use of enzymes or detergents theoretically capable of degrading specific membranes inside the infected cell.

The remit of this protocol is to propose a method to isolate the erythrocyte cytosol and ghosts from the other compartments of the infected cell via a percoll gradient. Also, the lysis of the erythrocyte membrane is done using equinatoxin II, which has proven to be more effective at ...
[摘要]  [摘要 ] 疟原虫内红细胞周期中细胞水平上宿主/病原体相互作用的研究需要采用差异提取技术来分析感染细胞的不同区室,文献中提出了各种方案来研究特定的区室和/或尽管理论上使用酶或去污剂能够降解被感染细胞内部的特定膜,但这项工作仍然很棘手。

该方案的任务是提出一种通过percoll 梯度从感染细胞的其他区室中分离出红细胞胞浆和鬼影的方法,此外,使用equinatoxin II 裂解红细胞膜的方法已经被证明是更有效的方法。有效的在红细胞裂解不管细胞感染状态,相比常用链球菌溶血素。该虫空泡(PV)的含量收集皂素后,恢复细胞膜和寄生虫胞液蛋白通过的Triton X-100裂解,裂解液由此获得的前通过分析W¯¯ 西部时代印迹以评估各种提取steps.This协议的准确度允许主机室的从寄生虫隔间(PV和寄生虫)的分离,从而导致出口到主机宿主蛋白质的潜力的研究,以及寄生虫蛋白质细胞。

[背景] 本文所介绍的协议是,我们最初发表在一个协议的一个改进的科学报告.The 该协议的最初的目标是执行的表征P. 疟原虫由寄生虫出口到它的主机cell.This蛋白允许的免疫荧光测定法的证实,证实了蛋白质的输出-以及被布雷菲德菌素A 阻断-以及在被感染的红细胞中输出时相互作用蛋白的分析(Gnangnon et al。,2019)。

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