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関連する概念動画

Clathrin Coated Vesicles01:12

Clathrin Coated Vesicles

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Clathrin-coated vesicles use endocytosis to transport receptors and lysosomal hydrolases from the Golgi to the lysosome in the late secretory pathway. Clathrin-mediated endocytosis was the first described endocytic process, and Clathrin-coated vesicles remain one of the most well-studied transport vesicles. The molecular machinery that generates clathrin-coated vesicles comprises over 50 proteins that precisely coordinate vesicle formation. Cell surface receptors concentrated in indented sites...
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SNAREs and Membrane Fusion01:43

SNAREs and Membrane Fusion

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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...
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Introduction to Membrane Traffic01:44

Introduction to Membrane Traffic

7.4K
The ER, Golgi apparatus, endosomes, and lysosomes work in tandem to modify, sort, and package proteins and lipids. An integrated membrane trafficking network facilitates the back and forth shuttling of molecules within different organelles in the same cell or across the cell membrane.
The transport of soluble and membrane proteins is mediated by transport vesicles that collect cargo from one cellular compartment and deliver it to another by fusing with the target organelle membrane. The Rab...
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Fusion of Secretory Vesicles with the Plasma Membrane01:26

Fusion of Secretory Vesicles with the Plasma Membrane

11.7K
Proteins and neurotransmitters in secretory vesicles can be released from a cell upon vesicle docking, priming, and fusion with the plasma membrane. Vesicles are docked and primed in preparation for the quick exocytosis of their contents in response to a stimulus. The fusion process is mainly carried out by a SNAP Receptor or SNARE complex, consisting of synaptobrevin, syntaxin-1, and SNAP-25.
In 1993, Jim Rothman proposed that the antiparallel pairing of vesicular and transmembrane SNAREs, or...
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Mechanisms of Membrane Domain Formation00:59

Mechanisms of Membrane Domain Formation

3.1K
Different physical properties of lipids and proteins allow them to localize and form distinct islands or domains in the membrane. Some membrane domains are formed due to protein-protein interactions, whereas others are formed due to the presence of specific lipids such as sphingolipids and sterols—for example, large proteins, such as bacteriorhodopsin, aggregate and create distinct domains.
Another mechanism for membrane domain formation involves membrane proteins interacting with...
3.1K
COP Coated Vesicles00:59

COP Coated Vesicles

8.0K
Membrane-enclosed structures called vesicles transport proteins and lipids across the cell. The vesicles derive their cargo from the plasma membrane, Golgi, ER, or endosome. Coated vesicles are spherical, protein-coated carriers with a 50–100 nm diameter that mediate bidirectional transport between the ER and the Golgi. The distribution of proteins between the ER and Golgi complex is dynamic and is maintained by different coated vesicles. Their formation is driven by the assembly of...
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Updated: Sep 9, 2025

Native Cell Membrane Nanoparticles System for Membrane Protein-Protein Interaction Analysis
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膀を用いて膜タンパク質の原生構造を捕捉する

Hang Liu1, Chun Mong Tse1, Shangyu Dang1,2

  • 1Division of Life Science, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, China.

Proceedings of the National Academy of Sciences of the United States of America
|September 3, 2025
PubMed
まとめ
この要約は機械生成です。

この研究は,膜タンパク質の構造研究のための新しい膀ベースの方法を導入し,ネイティブの脂質環境を保存し,洗剤のスクリーニングを排除します. このアプローチにより,ACRBのような重要なタンパク質の 高解像度の冷凍-EM構造が得られました.

キーワード:
クリオ・エムin situ 構造生物学膜タンパク質膜膀ミトコンドリア膜小胞

さらに関連する動画

Method to Visualize and Analyze Membrane Interacting Proteins by Transmission Electron Microscopy
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Method to Visualize and Analyze Membrane Interacting Proteins by Transmission Electron Microscopy

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Pulling Membrane Nanotubes from Giant Unilamellar Vesicles
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Pulling Membrane Nanotubes from Giant Unilamellar Vesicles

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関連する実験動画

Last Updated: Sep 9, 2025

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Method to Visualize and Analyze Membrane Interacting Proteins by Transmission Electron Microscopy
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Pulling Membrane Nanotubes from Giant Unilamellar Vesicles
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Pulling Membrane Nanotubes from Giant Unilamellar Vesicles

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科学分野:

  • 構造生物学
  • 膜タンパク質の生化学
  • クリオ電子顕微鏡

背景:

  • 膜タンパク質は重要な生物学的成分であり 薬物の標的です
  • 構造研究のための洗剤ベースの溶解は,ネイティブのタンパク質状態を変えることができます.
  • 適切な洗剤を特定することは困難で時間がかかります.

研究 の 目的:

  • 膜タンパク質を本来の脂質環境で研究するための膀ベースの方法を開発する.
  • 洗剤のスクリーニングと タンパク質の浄化を回避するためです
  • 高解像度構造と機能分析を可能にします.

主な方法:

  • 原生膜タンパク質を含む小胞の分離
  • 構造の決定のための冷凍電子顕微鏡 (冷凍EM).
  • 構造品質の改善のためのマイクログラフベースの分類戦略

主要な成果:

  • 3.88 Åの解像度でAcrBトランスポーターの冷凍-EM構造を決定した.
  • リポソームとナノ粒子と比較して,膀に結合したAcrBの超膜ヘリクスの優れた品質を達成した.
  • ミトコンドリアの膀における内生膜タンパク質 (F-ATPase,呼吸器複合体) を特定した.
  • 呼吸器複合体IIIの構造が解明され 共有サブユニット9が判明しました

結論:

  • 膀ベースの方法は,膜タンパク質の研究のための有望でシンプルなアプローチです.
  • この技術により,原生膜の環境が保たれ,構造と機能の研究が強化されます.
  • 洗剤ベースの方法の代替品として 作業の流れを簡素化します