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FisherbrandTM Bulk-Packed HDPE 7mL Scintillation Vial

Company: Fisher Scientific
Catalog#: 03-337-20
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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) ...

Preparation, Stimulation and Other Uses of Adult Rat Brain Synaptosomes
Author:
Date:
2017-12-20
[Abstract]  In this paper, our protocol for preparation of brain synaptosomes is described. Synaptosomes are a valuable model system for analysis of structural components of the synapse as well as for investigation of synaptic function. Synaptosomal preparations are necessary for understanding molecular changes at synapses where critical post-translational modifications of synaptic proteins may occur. Not only are synaptosomes rich in synaptic proteins, but they can be used for analyzing uptake of neurotransmitters into synaptic vesicles and for analysis of the involvement of neurotransmitter synthesis and release. Synaptosomes can be stimulated with increased calcium influx to release neurotransmitters. Synaptosomal preparations have been used in characterizing calcium dependent phosphorylation and ... [摘要]  在这篇论文中,我们描述了制备脑突触体的方案。突触体是用于分析突触的结构组分以及用于调查突触功能的有价值的模型系统。突触体制备对于理解可能发生突触蛋白的关键翻译后修饰的突触处的分子变化是必需的。突触小体不仅含有丰富的突触蛋白,还可用于分析神经递质向突触小泡的摄取和神经递质合成和释放的参与分析。可以用增加的钙内流刺激突触体释放神经递质。突触体制剂已被用于表征钙依赖性磷酸化和GABA合成酶GAD65(分子量为65kDa的L-谷氨酸脱羧酶)的活化。通过检查从突触体制剂获得的突触小泡膜上的蛋白质复合物,可以表征GAD65在GABA囊泡释放的偶联合成和囊泡摄取中的作用,这最终导致GABA囊泡释放GABA能神经传递的微调方法。

【背景】突触体制备方法在40多年前在神经科学研究实验室中建立,并且在涉及神经递质释放相关的细胞外钾升高以及对细胞内钙增加的应答方面具有极大的价值。除了阐明神经递质释放的过程之外,突触体制剂已经成为突触囊泡的有价值的来源。关于突触小泡的研究已经被用于表征参与偶联的神经递质合成和囊泡释放的蛋白质组分。突触体制剂作为突触囊泡分离的中间体也是非常有价值的,然后根据位于包含神经递质合成酶的囊泡膜上的蛋白质复合物进行分析。在这方面关键的意义在于包括CSP(胱氨酸 - ...

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