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Biochemistry
用于 X 射线晶体学的脂质双铈环境中的 ABCG5/G8 结晶
用于 X 射线晶体学的脂质双铈环境中的 ABCG5/G8 结晶
JoVE Journal
Biochemistry
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JoVE Journal Biochemistry
ABCG5/G8 Crystallization in a Lipidic Bicelle Environment for X-Ray Crystallography

用于 X 射线晶体学的脂质双铈环境中的 ABCG5/G8 结晶

Full Text
1,839 Views
06:47 min
August 25, 2023

DOI: 10.3791/65828-v

Sarah Wazir1, Danny Farhat1, Mahalashmi Srinivasan1,2, Jyh-Yeuan Lee1

1Department of Biochemistry, Microbiology and Immunology, Faculty of Medicine,University of Ottawa, 2Department of Biochemistry, Faculty of Medicine and Dentistry,University of Alberta

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Please note that some of the translations on this page are AI generated. Click here for the English version.

该协议描述了用于结晶甾醇转运蛋白ABCG5 / G8的设置。ABCG5/G8被复构成双细胞进行悬滴结晶。该协议不需要专门的材料或底物,因此可以在任何实验室中轻松使用,以通过X射线晶体学确定蛋白质结构。

您好,我的团队研究了跨越细胞膜的蛋白质损失类型,我们正在研究与医学和生物学的关系。具体来说,我们正在研究一种需要 ATP 来驱动其功能的特定蛋白质,然后它的名称称为 ATP 结合盒转运蛋白。特别是,我们正在研究它们的基本结构功能关系,然后用它来了解很多慢性疾病,尤其是心血管疾病。

由于纯化膜蛋白的复杂性及其在天然温度下的稳定性,获得3D蛋白晶体是该领域的主要挑战,也限制了药物发现应用。我们的团队已经建立了冷冻电镜和X射线晶体学方法,用于膜转运蛋白的结构研究。此前,我们的实验室还解决了第一个人类ABCG5 / G8专性异二聚体的晶体结构,包括载脂蛋白和胆固醇结合状态。

我们的研究结果可以在小分子药物发现或药物再利用方面提供突破。获得3D蛋白质晶体还可以进行蛋白质和配体复合物共结晶的浸泡实验。我们的实验室旨在确定ATP依赖性脂质转运蛋白对脂质识别和易位的分子基础。

我们还旨在建立药物开发的新方法,以研究ABC转运蛋白的分子动力学和结构方面。

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ABCG5/G8 脂质二聚体 X 射线晶体学 膜蛋白 脂质双层 去污剂 稳定性 均匀性 结构表征 双细胞 磷脂 高质量衍射晶体 高分辨率结构 天然构象 功能 三维晶体 去垢剂溶解异二聚体ABCG5/G8 DMPC/CHAPSO Bicelles 胆固醇 蒸气扩散 蛋白质结晶

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