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関連する概念動画

Asymmetric Lipid Bilayer01:35

Asymmetric Lipid Bilayer

Biological membranes show uneven distribution of different types of lipids in the inner and outer layers, resulting in transverse asymmetric membranes. The treatment of the erythrocyte membrane with the enzyme phospholipase confirmed the asymmetric nature of the lipid bilayer. The enzyme hydrolyzes lipids into fatty acids and hydrophilic groups. The phospholipase acts only on the outer layer of the membrane, while the inner layer remains intact. The phospholipase treatment resulted in 80%...
Membrane Domains01:18

Membrane Domains

The membrane domains concentrate specific lipids and proteins at one place within the membrane, which helps in cell signaling, adhesion, and other critical cellular processes. These domains can differ in size, composition, function, and lifespan.
Protein Domains
The membrane comprises a group of distinct proteins responsible for carrying out a cell's specific function. For example, the plasma membrane of the human sperm, or a single germ cell, contains a unique set of proteins in the anterior...
Mechanisms of Membrane Domain Formation00:59

Mechanisms of Membrane Domain Formation

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 cytoskeletal...
Fluid Mosaic Model01:19

Fluid Mosaic Model

Scientists identified the plasma membrane in the 1890s and its principal chemical components (lipids and proteins) by 1915. The model for plasma membrane structure, proposed in 1935 by Hugh Davson and James Danielli, was the first model to be widely accepted in the scientific community. The model was based on the plasma membrane's "railroad track" appearance in early electron micrographs. Davson and Danielli theorized that the plasma membrane's structure resembled a sandwich with the analogy of...
Mechanism of Lamellipodia Formation01:31

Mechanism of Lamellipodia Formation

Cells migrating in response to external stimuli form lamellipodia, which are thin membrane protrusions supported by a mesh of linked, branched, or unbranched actin filaments. These actin filaments interact with myosin motor proteins, creating the dynamic actomyosin complex within the cytoskeleton. Contractility, or the ability to generate contractile stress, is inherent to the actomyosin complex. It helps cells detect the stiffness of the surrounding ECM and exert contractile force for...
Lipids as Anchors01:32

Lipids as Anchors

In the plasma membrane, the lipids forming the bilayer can also act as an anchor to tether proteins to the membrane. The three main types of lipid anchors found in eukaryotes are – prenyl groups, fatty acyl groups, and glycosylphosphatidylinositol or GPI groups. Prenyl and fatty acyl groups act as anchors on the cytosolic surface of the membrane, whereas GPI anchors proteins on the extracellular side.
The carboxy-terminal of most of the prenylated proteins, such as Ras proteins, contains the...

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関連する実験動画

Updated: Jun 20, 2026

Ligand Nano-cluster Arrays in a Supported Lipid Bilayer
10:34

Ligand Nano-cluster Arrays in a Supported Lipid Bilayer

Published on: April 23, 2017

セル・サブストラット・インターフェースのパターニングのための自己調整されたサポートされた脂質バイレイヤー.

Keyue Shen1, Jones Tsai, Peng Shi

  • 1Department of Biomedical Engineering, Columbia University, New York, New York 10027, USA.

Journal of the American Chemical Society
|August 28, 2009
PubMed
まとめ
この要約は機械生成です。

研究者は,高解像度でパターン化されたサポートされた脂質二重層を作成するための新しい方法を開発しました. このプラットフォームは,空間的リガンド組織が細胞シグナル伝達,特にT細胞の相互作用にどのように影響するかを研究することを可能にします.

さらに関連する動画

Assembly of Cell Mimicking Supported and Suspended Lipid Bilayer Models for the Study of Molecular Interactions
12:18

Assembly of Cell Mimicking Supported and Suspended Lipid Bilayer Models for the Study of Molecular Interactions

Published on: August 3, 2021

Reconstitution of Membrane-Tethered Minimal Actin Cortices on Supported Lipid Bilayers
11:55

Reconstitution of Membrane-Tethered Minimal Actin Cortices on Supported Lipid Bilayers

Published on: July 12, 2022

関連する実験動画

Last Updated: Jun 20, 2026

Ligand Nano-cluster Arrays in a Supported Lipid Bilayer
10:34

Ligand Nano-cluster Arrays in a Supported Lipid Bilayer

Published on: April 23, 2017

Assembly of Cell Mimicking Supported and Suspended Lipid Bilayer Models for the Study of Molecular Interactions
12:18

Assembly of Cell Mimicking Supported and Suspended Lipid Bilayer Models for the Study of Molecular Interactions

Published on: August 3, 2021

Reconstitution of Membrane-Tethered Minimal Actin Cortices on Supported Lipid Bilayers
11:55

Reconstitution of Membrane-Tethered Minimal Actin Cortices on Supported Lipid Bilayers

Published on: July 12, 2022

科学分野:

  • バイオフィジックス 生物物理学
  • 細胞生物学 細胞生物学
  • マテリアルサイエンス 材料科学

背景:

  • 支持された脂質二重層は細胞膜を模倣し,その流動性や化学的性質の洞察を提供します.
  • 細胞表面の相互作用を理解するには,リガンドのプレゼンテーションを正確に制御する必要があります.
  • 脂質二重層のパターニングのための現在のテクニックは,解像度とマルチプレキシングの制限があります.

研究 の 目的:

  • 高解像度,多組成でサポートされた脂質二重層の表面を作成するための新しい方法を導入する.
  • 拡散バリアを使用した伝統的なバイレイヤーパターニング技術の解像度を高めるために.
  • 細胞シグナル伝達に対する空間リガンド組織の影響を研究するためのプラットフォームを提供すること.

主な方法:

  • パターンの解像度を向上させるため,拡散バリアの開発.
  • ラミナールフローなどの伝統的な二重層パターニング技術の適用.
  • マイクロメートルのスケールで異なる組成を持つ支持膜の複数の,並べられた領域を持つ表面の製造.

主要な成果:

  • 異なる構成領域を持つ,正確にパターン化されたサポートされた脂質二重層を作成する方法の実証.
  • T細胞受容体とLFA-1) のリガンドが,別々の隣接した二重層領域に結合して,成功裏に提示される.
  • パターニングでマイクロメートルスケールの解像度を達成し,密接に組織された細胞外リガンドの研究を可能にしました.

結論:

  • 開発されたプラットフォームは,複雑なサポートされた膜表面を作成するための新しいアプローチを提供します.
  • この技術は,細胞外リガンドの空間的分離が細胞の反応にどのように影響するかを調査することを容易にする.
  • この発見は,制御されたマイクロ環境における細胞-細胞の相互作用とシグナル伝達の研究に新しい道を開く.