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相关概念视频

Golgi Apparatus01:49

Golgi Apparatus

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As they leave the Endoplasmic Reticulum (ER), properly folded and assembled proteins are selectively packaged into vesicles. These vesicles are transported by microtubule-based motor proteins and fuse together to form vesicular tubular clusters, subsequently arriving at the Golgi apparatus, a eukaryotic endomembrane organelle that often has a distinctive ribbon-like appearance.
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Golgi Matrix Proteins01:12

Golgi Matrix Proteins

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Golgi matrix proteins are a group of highly dynamic proteins that maintain the stacked structure of Golgi. These proteins adapt to rapid morphological changes of the Golgi during the cell cycle. During cell division, mild proteolysis removes these connections resulting in Golgi unstacking. In The daughter cells, these proteins help reassemble the unstacked Golgi.
One of the first identified Golgi matrix proteins was GM130, a rod-like protein located in the cis-Golgi. Subsequently, many Golgi...
2.0K
Transport Across the Golgi01:26

Transport Across the Golgi

4.1K
While it is unclear how molecules move between adjacent Golgi cisternae, it is apparent that the molecules move from cis- cisterna, the entry face, to the trans- cisterna, the exit face. Experiments initially suggested vesicles that bud from one cisterna and fuse with the next cisterna to transport proteins between the cisternae. This vesicular transport model describes the Golgi apparatus as a relatively static structure with a unique enzyme composition in each cisterna. Molecules are...
4.1K
Directing Proteins to the Rough Endoplasmic Reticulum01:34

Directing Proteins to the Rough Endoplasmic Reticulum

7.1K
The organelle-specific signaling sequences direct proteins synthesized in the cytosol to their final destination like ER, mitochondria, peroxisomes, etc. Some of the proteins directed to ER are then trafficked via vesicles to other organelles within the cell or the extracellular environment through the Golgi complex. For example, the rough ER synthesizes soluble proteins for transportation to the lysosomes or secretion out of the cell. It can also synthesize transmembrane proteins that can...
7.1K
Coat Assembly and GTPases01:33

Coat Assembly and GTPases

3.5K
Vesicles incorporate different coat protein subunits in different cell locations, which changes the properties of the coat, such as the shape and geometry of the transport vesicles. Thus, vesicle coat proteins also play a significant role in cargo selection.
Coat assembly depends on the local availability of phosphatidylinositol phosphates or PIPs and GTP-binding proteins. Adaptor proteins, which link the coat proteins to the membrane, bind to these PIPs and play a crucial role in controlling...
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GPI Anchoring of Proteins in the ER Membrane01:29

GPI Anchoring of Proteins in the ER Membrane

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GPI-anchoring is a post-translational, reversible protein modification that is ubiquitous in eukaryotes. Such proteins are primarily present on the exoplasmic leaflet of the plasma membrane.
GPI-anchor structure
A sequence of 11 enzymatic reactions results in the synthesis of the complete GPI anchor consisting of a hydrophobic and a hydrophilic portion. The hydrophobic portion comprises phosphatidylinositol, while the hydrophilic part comprises polar groups like phosphoethanolamine,...
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相关实验视频

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Quantitative Localization of a Golgi Protein by Imaging Its Center of Fluorescence Mass
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阿斯巴拉古斯的戈尔吉追踪器

Saidbakhrom Saidjalolov1, Xiao-Xiao Chen1, Julia Moreno1

  • 1Department of Organic Chemistry, University of Geneva, CH-1211 Geneva, Switzerland.

JACS Au
|November 1, 2024
PubMed
概括
此摘要是机器生成的。

酸衍生物 (AspA) 的醇介导吸收 (TMU) 在戈尔吉器官中通过酸交换发生. 新的AspA探测器使得先进显微镜的选择性戈尔吉标记成为可能,在没有遗传修饰的情况下对细胞动态进行成像.

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科学领域:

  • 细胞生物学 细胞生物学
  • 生物化学 生物化学
  • 分子成像学分子成像学

背景情况:

  • 硫醇介导吸收 (TMU) 是一种涉及动态共价交换网络的细胞过程.
  • 对于酸衍生物 (AspA) 的TMU精确的级联和最终步骤尚未完全理解.

研究的目的:

  • 为AspA阐明TMU的完整布,识别终端交换伙伴和蜂位置.
  • 开发基于AspA的新型探针,用于对戈尔吉仪器进行选择性和高效的标签.

主要方法:

  • 研究了AspA衍生物的TMU级联,专注于二硫化物和硫酸交换机制.
  • 合成的AspA与pH敏感的光素,红移-胺和机械敏感的探针结合.
  • 利用光显微镜,包括刺激排放枯竭 (STED) 显微镜,在活细胞和固定细胞中.

主要成果:

  • 证明了AspATMU级联在戈尔吉器官 (G) 中以转移到涉及棕醇转移酶的硫交换结束.
  • AspA探针在各种细胞类型中选择性地标记了戈尔吉装置,而不需要细胞工程.
  • AspA追踪器表现出高速,简单,以及与STED显微镜等先进成像技术的兼容性,并且可以区分Golgi/ER和cis/trans隔间.

结论:

  • AspA探针为戈尔吉仪器研究提供了一种多功能工具,可以可视化细胞动态,膜性质和贩运.
  • 开发的探测器有助于成像戈尔吉形态,前级囊泡运输和膜秩序/张力.
  • 这些基于AspA的Golgi追踪器为研究生物系统中的Golgi功能和TMU提供了显著的优势.