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関連する概念動画

Mechanisms of Membrane Domain Formation00:59

Mechanisms of Membrane Domain Formation

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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...
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Mechanisms of Membrane-bending01:15

Mechanisms of Membrane-bending

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The living membranes are flexible due to their fluid mosaic nature; however, their bending into different shapes is an active process regulated by specific lipids and proteins. The membrane bending can be transient as seen in vesicles or stable for a long time as in microvilli. Cells regulate the size, location, and duration of the membrane curvature.
Membrane bending can happen due to intrinsic changes in lipid composition or extrinsic association with different proteins. The proteins involved...
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Assembly of Signaling Complexes01:30

Assembly of Signaling Complexes

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Multiprotein signaling complexes are formed in a dynamic process involving protein-protein interactions at the cytoplasmic domain of transmembrane receptors or enzymatic and non-enzymatic proteins associated with the receptor. These complexes ensure the activation and propagation of intracellular signals that regulate cell functions.
Interaction domains in cell signaling
Interaction domains recognize exposed features of their binding partners containing post-translationally modified sequences,...
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Protein Diffusion in the Membrane01:24

Protein Diffusion in the Membrane

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Proteins show rotational as well as lateral diffusion across the membrane. The lateral diffusion of proteins was confirmed through the cell fusion experiment where mouse and human cells were fused, resulting in hybrid cells. When the human and mouse cells fused, the specific membrane proteins on human and mouse cells were marked with the red and green-fluorescent markers, respectively. Initially, the red and green fluorescence was located on the respective hemisphere of the cell. As time...
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What are Membranes?01:54

What are Membranes?

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A key characteristic of life is the ability to separate the external environment from the internal space. To do this, cells have evolved semi-permeable membranes that regulate the passage of biological molecules. Additionally, the cell membrane defines a cell’s shape and interactions with the external environment. Eukaryotic cell membranes also serve to compartmentalize the internal space into organelles, including the endomembrane structures of the nucleus, endoplasmic reticulum and...
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Protein Complexes with Interchangeable Parts01:57

Protein Complexes with Interchangeable Parts

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Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order...
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適応性細胞相互作用のプログラミングのための膜タンパク質のDNAベースのダイナミックミミクリ

Jin Li1,2, Kanyu Xun2, Liyan Zheng2

  • 1The Cancer Hospital of the University of Chinese Academy of Sciences, Institute of Basic Medicine and Cancer (IBMC), Chinese Academy of Sciences, Hangzhou, Zhejiang 310022, China.

Journal of the American Chemical Society
|March 18, 2021
PubMed
まとめ

研究者たちは 細胞表面のDNAナノアーキテクチャを設計し ダイナミックな膜タンパク質を模倣しました このシステムは環境のシグナルに反応して 細胞の相互作用と治療細胞工学を 精密に制御できます

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科学分野:

  • バイオテクノロジー
  • 合成生物学
  • 細胞工学

背景:

  • 細胞膜はタンパク質の発現と形状を動的に制御し,環境を感知し,それに反応する.
  • 細胞の相互作用を操作する既存の方法は,しばしば外部刺激に対するダイナミックな反応が欠けている.

研究 の 目的:

  • 細胞表面のナノアーキテクチャを設計する ダイナミックな膜タンパク質の振る舞いを模倣する
  • 分子認識による DNA アセンブリを制御した 細胞の相互作用を可能にします
  • カスタマイズされたセンシングと応答能力を持つ 治療細胞の設計のためのプラットフォームを開発する.

主な方法:

  • 膜に固定されたDNAナノアーキテクチャの開発.
  • 細胞反応信号によって誘発された DNA アセンブリの 分子認識を活用する
  • 外部刺激による特定の活性化を示す.
  • 機能的なモジュールを細胞膜に組み込み 標的を特定して結合させ 殺す.

主要な成果:

  • 設計されたDNAナノアーキテクチャは ダイナミックな膜タンパク質の振る舞いを成功裏に模倣しています
  • このシステムは細胞反応信号と 外部刺激によって 具体的に活性化されます
  • 機能的なモジュールは膜に組み立てられ,細胞タイプに特異的な結合と殺戮を可能にしました.
  • このプラットフォームは セルにカスタマイズされた 感知と応答の経路を装備する能力を示しました

結論:

  • 開発された細胞表面DNAナノアーキテクチャは,ダイナミックな膜タンパク質機能を真似するための新しいアプローチを提供します.
  • このシステムは,環境感知と応答能力に合わせた 治療細胞を設計するための 多様なプラットフォームを提供します.
  • この発見は,合成生物学による細胞ベースの治療法の進歩のための新しいパラダイムを示しています.