相关实验视频

Updated: Jul 16, 2026

In Vitro Aggregation Assays Using Hyperphosphorylated Tau Protein

In Vitro Aggregation Assays Using Hyperphosphorylated Tau Protein

Published on: January 2, 2015

内在无序的神经蛋白tau和阳离子脂质体的混合物揭示了与液-液相分离的同生物共存的独特的阳离子脂质体-tau复合体

Christine Tchounwou^1,2, Anjali J Jobanputra^1,2,3, Dylan Lasher^1,4

¹Materials Department, University of California, Santa Barbara, California 93106, United States.

Langmuir : the ACS journal of surfaces and colloids

|September 28, 2024

概括

我们研究了蛋白如何与离子脂质体相互作用,模仿神经元膜. 在生理盐度下与脂质体形成稳定的复合体,这表明它在神经退行性疾病中的作用机制.

科学领域:

生物物理学的生物物理.
神经科学是一个神经科学.
材料科学材料科学材料科学

背景情况:

是一种与微管相关的内在失调的神经元蛋白质.
异常的微管相互作用与阿尔茨海默氏症和其他神经退行性疾病有关.
的多性质和与阳离子表面的相互作用是其功能和功能障碍的关键.

研究的目的:

为了研究全长的人类陶蛋白和阴离子脂质体 (ALs) 之间的相互作用.
了解如何形成复合体与脂质双层模仿神经元膜的复合体.
探索盐度对脂体复合体形成和稳定性的作用.

主要方法:

差异干扰对比 (DIC) 和光显微镜被用来可视化脂体相互作用.
使用的是由脂 (DOPS) 或脂 (DOPG) 与脂 (DOPC) 混合而成的阴性脂质体.
实验在一系列盐度 (0150毫米KCl或NaCl) 中进行.

主要成果:

在较低盐度下,形成了协体和具有多种形态的明显的-脂质组复合体 (-脂质组).
脂复合物包括装饰的巨型囊泡和较小脂质体的介导组合.
在生理盐度 (≥150 mM) 时,-脂质体复合体保持稳定,而自我化物溶解,表明依赖盐的相互作用.

结论:

的明显的阴离子域可能与轴突等离子体膜的阴离子脂质域相互作用.
这些相互作用是暂时的,但在神经元中发现的生理离子强度下是强大的.
这些发现支持与神经元膜相互作用的模型,与神经退行性疾病机制相关.

更多相关视频

An In Vitro Model for Studying Tau Aggregation Using Lentiviral-mediated Transduction of Human Neurons

An In Vitro Model for Studying Tau Aggregation Using Lentiviral-mediated Transduction of Human Neurons

Published on: May 23, 2019

Modulation of Tau Subcellular Localization as a Tool to Investigate the Expression of Disease-related Genes

Modulation of Tau Subcellular Localization as a Tool to Investigate the Expression of Disease-related Genes

Published on: December 20, 2019

相关概念视频

SNAREs and Membrane Fusion

SNAREs and Membrane Fusion

Once a transport vesicle has recognized its target organelle, the vesicular membrane needs to fuse with the target membrane to unload the cargo. Transmembrane proteins called SNAREs present on organelle membranes and their vesicles, mediate vesicle fusion.
SNAREs exist in pairs that symmetrically interact and catalyze the fusion of the lipid bilayers in vesicle and target organelle. v-SNARE in the vesicle membrane are single polypeptide chains that bind to a complementary t-SNARE, composed of 2...

Tail-anchoring of Proteins in the ER Membrane

Tail-anchoring of Proteins in the ER Membrane

Tail-anchored, or TA, proteins are estimated to make up to 3-5% of membrane proteins found in the eukaryotic cell. Such proteins have a single transmembrane domain located approximately 30 amino acid residues upstream from the C-terminal end. As a result, the signal recognition particle (SRP) cannot guide a TA protein to the ER membrane for cotranslational insertion. Hence, they are integrated into the ER membrane post-translationally using their C-terminal end as the anchor. TA proteins...