相关实验视频

Updated: Mar 10, 2026

Myosin-Specific Adaptations of In vitro Fluorescence Microscopy-Based Motility Assays

Myosin-Specific Adaptations of In vitro Fluorescence Microscopy-Based Motility Assays

Published on: February 4, 2021

在活细胞中直接观察单个肌肉素VI分子的纳米尺寸步骤

Quang Quan Nguyen¹, Jiamin Zeng^2,3, Truong Son Bui¹

¹Department of Physics, The Hong Kong University of Science and Technology, Clearwater Bay, Kowloon 999077, Hong Kong SAR, China.

|March 9, 2026

概括

研究人员测量了活细胞中单个肌肉蛋白VI运动蛋白的纳米尺寸步骤. 这项研究揭示了关于运动蛋白质动态和ATP结合口袋在细胞运动中的作用的关键细节.

科学领域:

细胞生物学细胞生物学
生物物理学的生物物理.
分子电机分子电机

背景情况:

活细胞表现出动态过程,包括由运动蛋白进行货物运输.
测量细胞内的运动蛋白的纳米级运动在技术上是具有挑战性的.

研究的目的:

直接测量活细胞中单个肌肉蛋白VI电机蛋白的纳米尺寸步骤.
为了研究ATP结合口袋中的突变对肌酸VI的运动性的功能影响.

主要方法:

使用细胞透性,光稳定的SiR-d12染料与甲链接剂结合进行标签.
采用HaloTag化肌肉蛋白VI和全内部反射光显微镜 (TIRFM) 进行单分子追踪.

主要成果:

观察到的野生类型肌肉素VI的步骤大小超过了基于其杆臂长度的预测.
具有ATP结合口袋突变的Myosin VI显示速度降低,停留时间长,运行长度减少.

结论:

在活细胞中直接测量单一运动蛋白步骤,可以提供关键的机械洞察力.
这种ATP结合口袋对于肌酸VI的运动功能和细胞运输动态至关重要.

关键词:

活细胞成像成像技术肌素 VI 的存在.单颗粒追踪器是一个单颗粒追踪器.单分子生物物理学的生物物理学.阶段性机制阶段性机制非传统的肌肉蛋白.

更多相关视频

In Vivo Single-Molecule Tracking at the Drosophila Presynaptic Motor Nerve Terminal

In Vivo Single-Molecule Tracking at the Drosophila Presynaptic Motor Nerve Terminal

Published on: January 14, 2018

Dissecting Mechanoenzymatic Properties of Processive Myosins with Ultrafast Force-Clamp Spectroscopy

Dissecting Mechanoenzymatic Properties of Processive Myosins with Ultrafast Force-Clamp Spectroscopy

Published on: July 1, 2021

相关概念视频

Studying the Cytoskeleton

Studying the Cytoskeleton

The cytoskeletal architecture can be studied using different microscopic and biochemical techniques. Electron microscopy was instrumental in discovering the cytoskeletal architecture around the 1960s, which allowed obtaining structural information at a high-resolution level. However, the sample preparation procedure often limits this ability in biological samples. Several protocols have been developed over the years to optimize sample preparation. In one of the protocols known as rotary...