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Filter systems (250 ml, 0.22 μm)

Company: Corning
Catalog#: 430767
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Expression and Purification of the Human Cation-chloride Cotransporter KCC1 from HEK293F Cells for Structural Studies
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Date:
2021-04-05
[Abstract]  

Cation-chloride cotransporters (CCCs) mediate the coupled, electroneutral symport of cations such as Na+ and/or K+ with chloride across membrane. Among CCCs family, K-Cl cotransporters (KCC1-KCC4) extrude intracellular Cl- by the transmembrane K+ gradient. In humans, these KCCs play vital roles in the physiology of the nervous system and kidney. However, mechanisms underlying the KCCs specific properties remain poorly understood, partly because purification of membrane proteins is challenging. Here, we present the protocol for purifying the full-length KCC1 from HEK293F cells used in our recent publication (Liu et al., 2019). The procedure may be adapted for functional and structural studies.

[摘要]  [摘要]阳离子-氯化物共转运蛋白(CCC)介导诸如Na +和/或K +的阳离子与氯离子在膜上的耦合,电中性共价。间幼儿中心家庭,K-CL协同转运蛋白(KCC1-KCC4)抽UDE细胞内氯-通过跨膜ķ +梯度。在人类中,这些KCC在神经系统和肾脏的生理中起着至关重要的作用。然而,特定的KCC性质保持基本机制知之甚少,部分是因为膜蛋白的纯化是具有挑战性的。在这里,我们介绍了从我们最近的出版物中使用的HEK293F细胞中纯化全长KCC1的方案(Liu等人,2019)。该程序可适用于功能和结构研究。

[背景]人类溶质载体12(SLC12 )基因家族编码阳离子的氯化物协同转运蛋白(CCCS)介导Cl组成的电中性同向转运-和阳离子的Na +或(和)K +跨越质膜。根据其转运特性和氨基酸序列定义,CCC可分为几个分支,包括两个Na-K-2Cl协同转运蛋白(NKCC1和NKCC2),一个Na-Cl协同转运蛋白(NCC)和四个K-Cl协同转运蛋白(KCC1-KCC4 )。CCC在细胞体积调节,肾脏盐分重吸收和神经元GABA能调节中起重要作用。CCC的结构,生化和生物物理研究涉及在去污剂溶解状态下蛋白质生产和稳定方面的挑战。杆状病毒转导HEK293F细胞(BacMam)系统是异源表达由Eric ...

Ciberial Muscle 9 (CM9) Electrophysiological Recordings in Adult Drosophila melanogaster
Author:
Date:
2017-07-20
[Abstract]  The complexity surrounding presynaptic recordings in mammals is a significant barrier to the study of presynaptic mechanisms during neurotransmission in the mammalian central nervous system (CNS). Here we describe an adult fly neuromuscular junction (NMJ), the ciberial muscle 9 (CM9) NMJ, which allows for the recording of both evoked (EPSPs) and spontaneous postsynaptic excitatory potentials (mEPSPs) at a mature glutamatergic synapse. Combined with CM9-specific genetic technologies, the CM9 NMJ provides a powerful experimental system to better understand the regulation of neurotransmitter release at a mature synapse. [摘要]  围绕哺乳动物突触前记录的复杂性是哺乳动物中枢神经系统(CNS)神经传递过程中突触前机制研究的重要障碍。 在这里,我们描述成人飞行神经肌肉接头(NMJ),西伯利亚肌肉9(CM9)NMJ,其允许记录诱发(EPSP)和自发性突触后兴奋性潜力(mEPSPs)在成熟的谷氨酸能突触。 结合CM9特异性遗传技术,CM9 NMJ提供了一个强大的实验系统,以更好地了解成熟突触神经递质释放的调节。
【背景】在老化过程中定义突触前功能变化的重要障碍是由于缺乏一个简单的模型系统,用于执行必要的电生理记录,以彻底地表征神经递质从突触前神经末梢的释放。现有的啮齿动物模型遭受与衰老研究相关的显着成本问题和在具有一致释放参数的单个定义的神经末梢上使用电生理记录的技术难度。为了克服这些障碍,我们在成年果蝇中开创了一种模型突触系统,用于分析年龄对神经传递过程中突触前功能的影响,CM9 NMJ位于飞翔的长鼻(Rawson等) ,2012; Mahoney等人,2014; Mahoney等人,2016)(图4A)。简而言之,CM9运动神经元(MN)的突触前心轴收敛于CM9肌肉的15个肌肉纤维,以形成35个独立的神经支配(Rawson等人,2012)。已显示CM9 MN对于CM9肌肉的收缩是必需的,并且是CM9肌肉的谷氨酸能输入的唯一来源(Kimura等人,1986; ...

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