{{'Search' | translate}}
 

Imidazole

公司名称: Sigma-Aldrich
产品编号: 56748
Bio-protocol()
Company-protocol()
Other protocol()

Purification of Cytosolic Phospholipase A2α C2-domain after Expression in Soluble Form in Escherichia coli
Author:
Date:
2021-02-05
[Abstract]  

Previous expression/purification strategies for cytosolic phospholipase A2α C2-domain in Escherichia coli have relied on refolded protein recovered from inclusion bodies and sometimes containing C-terminal Cys139Ala and Cys141Ser substitutions to eliminate potential refolding complications induced by Cys residues. The protocol presented herein describes an effective method for the expression of cytosolic phospholipase A2α C2-domain in soluble form in E. coli and subsequent purification to homogeneity. This protocol, which utilizes a cleavable 6xHis-SUMO tag, has recently been used

...
[摘要]  [摘要]胞质磷脂酶A上一页表达/纯化策略2 α在C2结构域Ê scherichia大肠杆菌一直依赖于重折叠蛋白从包涵体回收和有时含有C末端Cys139Ala和Cys141Ser取代,以消除由感应电势再折叠的并发症的Cys残基。本文所介绍的协议描述了用于胞浆型磷脂酶A的表达的有效方法2 αC2结构域以可溶形式在大肠杆菌和随后的纯化至均一。此协议,它利用可切割的6xHis-SUMO标记,最近被用于洞察磷脂的结构基础-通过胞浆型磷脂酶A的C2结构域胆碱识别2 α(平野。等人,2019 )

[背景技术]磷脂酶A 2 (PLA 2)是一个多样化酶超家族的成员水解的SN -2酰基酯键的磷酸甘油酯(史密斯,1989;丹尼斯。等人,2011; Mouchlis和Dennis,2019 )。胞质PLA 2 α(与cPLA 2 α),第IV族哺乳动物PLA2家族成员,优选从在细胞内的Ca磷酸甘油酯释放花生四烯酸2+ -浓度依赖性(克拉克等人清水;,1991等人,2006; Leslie等,2010; Vasquez等,2018; Astudillo等,2019 )。花生四烯酸通过与cPLA产生2 α用作促炎症类花生酸的前体,包括某些前列腺素和白三烯。因此,与cPLA 2 ...

Expression, Purification and Crystallisation of the Adenosine A2A Receptor Bound to an Engineered Mini G Protein
Author:
Date:
2017-04-20
[Abstract]  G protein-coupled receptors (GPCRs) promote cytoplasmic signalling by activating heterotrimeric G proteins in response to extracellular stimuli such as light, hormones and nucleosides. Structure determination of GPCR–G protein complexes is central to understanding the precise mechanism of signal transduction. However, these complexes are challenging targets for structural studies due to their conformationally dynamic and inherently transient nature. We recently developed an engineered G protein, mini-Gs, which addressed these problems and allowed the formation of a stable GPCR–G ... [摘要]  G蛋白偶联受体(GPCR)通过激活异源三聚体G蛋白来响应细胞外刺激如光,激素和核苷来促进细胞质信号传导。 GPCR-G蛋白复合物的结构测定对于了解信号转导的精确机制至关重要。然而,由于它们的构象动态和固有的短暂性质,这些复合物是结构研究的具有挑战性的目标。我们最近开发了一种工程化的G蛋白,微型G ,解决了这些问题,并允许形成稳定的GPCR-G蛋白复合物。 Mini-G 促进了人腺苷A 2A受体(A 2A 2A)在其G蛋白结合构象中的结构测定,在3.4 Å分辨率。在这里,我们描述了A 2A R R的表达和纯化的一步一步的方案,并且A 2AA-R-mini-G'子>复杂。

背景 我们最近开发了一种工程化的最小G蛋白,迷你G(Carpenter和Tate,2016),其促进了人腺苷A 2A受体的结构测定(A <其活性状态(carpenter等人,2016)。 mini-g="">充分稳定A 2A R的活性构象,以允许络合物在洗涤剂辛硫基葡糖苷中通过蒸气扩散结晶。在这里,我们描述了一种用于表达和纯化Aβ2A ...

Expression and Purification of Mini G Proteins from Escherichia coli
Author:
Date:
2017-04-20
[Abstract]  Heterotrimeric G proteins modulate intracellular signalling by transducing information from cell surface G protein-coupled receptors (GPCRs) to cytoplasmic effector proteins. Structural and functional characterisation of GPCR–G protein complexes is important to fully decipher the mechanism of signal transduction. However, native G proteins are unstable and conformationally dynamic when coupled to a receptor. We therefore developed an engineered minimal G protein, mini-Gs, which formed a stable complex with GPCRs, and facilitated the crystallisation and structure determination of ... [摘要]  异源三聚体G蛋白通过将细胞表面G蛋白偶联受体(GPCR)的信息转导至细胞质效应蛋白来调节细胞内信号传导。 GPCR-G蛋白复合物的结构和功能表征对于完全破译信号转导机制是重要的。然而,当与受体偶联时,天然G蛋白质是不稳定的并具有构象的动力学。因此,我们开发了一种工程化的最小G蛋白,其与GPCR形成稳定的复合物,促进了人腺苷A 2A受体的结晶和结构测定(A 2AR)的活性构象。 Mini G蛋白是各种应用中潜在有用的工具,包括表征GPCR药理学,结合亲和力和动力学实验,激动剂药物发现和GPCR-G蛋白复合物的结构测定。在这里,我们描述了一个用于表达和纯化mini-G 的详细方案。

我们最近报告了一种工程化的最小G蛋白质(Carpenter和Tate,2016)的开发,其促进了人腺苷A 2A受体的结晶( A 2 R 2)其活性构象(Carpenter等人,2016; Carpenter和Tate,2017)。不同于需要在真核系统中表达的异源三聚体G蛋白质,在大肠杆菌(大肠杆菌)中高度表达微型G蛋白,并且可以可以容易地纯化,每升培养物的产量为50-100mg的mini-G 。在这里,我们描述了早先在Carpenter和Tate(2016)中描述的可以用于前面描述的任何一种迷你G蛋白构建体的表达和纯化的逐步方案(Carpenter等人, ...

产品评论