相关实验视频

Updated: Mar 16, 2026

Visualizing Membrane Ruffle Formation using Scanning Electron Microscopy

Visualizing Membrane Ruffle Formation using Scanning Electron Microscopy

Published on: May 27, 2021

甘氨酸对内细胞分裂的抑制来自于静电反射而不是静电反射

Advika Kamatar¹, Jose A Villalobos², Carl C Hayden¹

¹Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX, USA.

Biophysical journal

|March 15, 2026

概括

细胞表面蛋白质的糖化阻碍了克拉特林介导的内细胞分裂. 这项研究表明,糖的固体质量,而不是它们的负电荷,主要负责防止受体吸收.

科学领域:

细胞生物学细胞生物学
生物化学生化学
葡萄糖生物学葡萄糖生物学

背景情况:

克拉特林介导的内细胞分裂 (CME) 对于细胞功能,如营养吸收和信号传递至关重要.
跨膜受体的糖基化可以阻碍CME,这表明它在调节细胞表面蛋白质停留时间方面发挥了作用.
赋予对内细胞分裂的抵抗力的特定甘氨酸特征仍然不清楚.

研究的目的:

为了调查体或静电排斥从甘氨酸是主要抑制内细胞分裂的因素.
阐明糖基化影响细胞表面蛋白质内部化的机制.

主要方法:

利用人工的连接体-受体系统来招募糖基化连接体到细胞表面.
基于Muc1 ectodomain的工程配体,有或没有酸残留.
评估了糖化对受体吸收和结合体在内细胞分裂过程中的水力动力半径的影响.

主要成果:

酸残留物对受体吸收或糖化联体的水力动力半径的影响很小.
存在O-糖显著影响了内细胞分裂,与硬质性相关.
研究结果表明,固体阻碍,而不是负电荷,是抵抗内细胞形成的主要因素.

结论:

O-甘氨酸的硬质量,而不是静电排斥,是防止糖蛋白质的克拉介导内细胞分裂的主要驱动因素.
这种理解对于理解糖蛋白循环和细胞信号传递动态至关重要.
影响扩展到正常的生理过程和疾病状态,包括改变的糖蛋白功能.

更多相关视频

Engineering Antiviral Agents via Surface Plasmon Resonance

Engineering Antiviral Agents via Surface Plasmon Resonance

Published on: June 14, 2022

Targeting Cysteine Thiols for in Vitro Site-specific Glycosylation of Recombinant Proteins

Targeting Cysteine Thiols for in Vitro Site-specific Glycosylation of Recombinant Proteins

Published on: October 4, 2017

相关概念视频

Oligosaccharide Assembly

Oligosaccharide Assembly

Protein glycosylation starts in the ER lumen and continues in the Golgi apparatus. Glycosyltransferases catalyze the addition of sugar molecules or glycosylation of proteins. Usually, these enzymes add sugars to the hydroxyl groups of selected serine or threonine residues to form O-linked glycans or the amino groups of asparagine residues to form N-linked glycans. Different positions on the same polypeptide chain can contain differently linked glycans.
Multiple sugar molecules that may or may...

Glycocalyx and its Functions

Glycocalyx and its Functions

The glycocalyx is a carbohydrate-rich, fuzzy-appearing layer on the outer surface of the cell membrane. It is highly hydrophilic, because of this it attracts large amounts of water to the cell's surface. This aids the cell's interaction with the watery environment and also helps it to obtain substances dissolved in the water. It is also important for cell identification, self/non-self determination, and embryonic development and is used in cell-to-cell attachments to form tissues.

Receptor-mediated Endocytosis

Receptor-mediated Endocytosis

Receptor-mediated endocytosis is when bulk amounts of specific molecules are imported into a cell after binding to cell surface receptors. The molecules bound to these receptors are taken into the cell through inward folding of the cell surface membrane, which is eventually pinched off into a vesicle within the cell. Structural proteins, such as clathrin, coat the budding vesicle.
Clathrin-Mediated Endocytosis of LDL
One well-characterized example of receptor-mediated endocytosis is the...

Receptor-mediated Endocytosis

Receptor-mediated Endocytosis

Receptor-Mediated Endocytosis

Receptor-Mediated Endocytosis

GPCR Desensitization

GPCR Desensitization

G protein-coupled receptor (GPCR) signaling plays a crucial role in cell functioning. GPCR desensitization is an equally essential process. It allows cells to respond to changing environments and regain sensitivity to new stimuli while preventing unnecessary stimulation when no longer needed. Prolonged exposure to stimuli leads to GPCR desensitization. It involves blocking the receptors from binding and activating additional G proteins. This inhibits activation of downstream effectors, thereby...