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関連する概念動画

Mechanisms of Membrane-bending01:15

Mechanisms of Membrane-bending

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...
ATP Synthase: Structure01:18

ATP Synthase: Structure

ATP synthase or ATPase is among the most conserved proteins found in bacteria, mammals, and plants. This enzyme can catalyze a forward reaction in response to the electrochemical gradient, producing ATP from ADP and inorganic phosphate. ATP synthase can also work in a reverse direction by hydrolyzing ATP and generating an electrochemical gradient. Different forms of ATP synthases have evolved special features to meet the specific demands of the cell. Based on their specific feature, ATP...
Mechanism of Filopodia Formation01:39

Mechanism of Filopodia Formation

Filopodia are thin, actin-rich cellular protrusions that play an important role in many fundamental cellular functions. They vary in their occurrence, length, and positioning in different cell types, suggesting their diverse roles.
Their main function is to guide migrating cells during normal tissue morphogenesis or cancer metastasis by recognizing and making initial contacts with the extracellular matrix. However, they can also act as stationary cell anchors or help to establish communication...
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...
Cell Motility through Blebbing01:16

Cell Motility through Blebbing

Blebs are a type of membrane protrusion formed by the internal hydrostatic pressure of the cytoplasm. Blebs are observed in several cell types, including fibroblasts, immune cells, and single-celled organisms like the amoeba. The primary function of blebs is cell locomotion and apoptosis, but they are also found during necrosis and cell division. The life cycle of a bleb comprises an initiation phase followed by the expansion and retraction phases.
Blebbing Through the Matrix
In multicellular...
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...

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関連する実験動画

Updated: Jun 14, 2026

Membrane Remodeling of Giant Vesicles in Response to Localized Calcium Ion Gradients
08:15

Membrane Remodeling of Giant Vesicles in Response to Localized Calcium Ion Gradients

Published on: July 16, 2018

カベオリン駆動の膜屈曲の構造的基礎

Sarah M Connelly, Leon Bergner, Ajit Tiwari

    bioRxiv : the preprint server for biology
    |February 20, 2026
    PubMed
    まとめ
    この要約は機械生成です。

    ケベオリン (細胞膜構造に不可欠なタンパク質) は,ユニークな円盤を形成することで膜を改造します. 特殊な水性残留パターンが膜の曲げを決定し,基本的彫刻原理を明らかにする.

    さらに関連する動画

    Inner Mitochondrial Membrane Sensitivity to Na+ Reveals Partially Segmented Functional CoQ Pools
    05:27

    Inner Mitochondrial Membrane Sensitivity to Na+ Reveals Partially Segmented Functional CoQ Pools

    Published on: July 20, 2022

    The Mechanics of (Poro-)Elastic Contractile Actomyosin Networks As a Model System of the Cell Cytoskeleton
    08:50

    The Mechanics of (Poro-)Elastic Contractile Actomyosin Networks As a Model System of the Cell Cytoskeleton

    Published on: March 10, 2023

    関連する実験動画

    Last Updated: Jun 14, 2026

    Membrane Remodeling of Giant Vesicles in Response to Localized Calcium Ion Gradients
    08:15

    Membrane Remodeling of Giant Vesicles in Response to Localized Calcium Ion Gradients

    Published on: July 16, 2018

    Inner Mitochondrial Membrane Sensitivity to Na+ Reveals Partially Segmented Functional CoQ Pools
    05:27

    Inner Mitochondrial Membrane Sensitivity to Na+ Reveals Partially Segmented Functional CoQ Pools

    Published on: July 20, 2022

    The Mechanics of (Poro-)Elastic Contractile Actomyosin Networks As a Model System of the Cell Cytoskeleton
    08:50

    The Mechanics of (Poro-)Elastic Contractile Actomyosin Networks As a Model System of the Cell Cytoskeleton

    Published on: March 10, 2023

    科学分野:

    • 分子生物学は分子生物学である.
    • 構造生物学 構造生物学とは
    • 細胞生物学 細胞生物学

    背景:

    • 洞窟素は,洞窟形成,細胞シグナル伝達,脂質調節に関与する必須の単一型膜タンパク質である.
    • 構造研究は,カベオリンが,他の膜改造タンパク質とは異なる保存された構造を持つ,アンフィパティックな円盤状のオリゴーマーを形成することを明らかにしています.

    研究 の 目的:

    • カベオリン円盤が膜の曲げを誘発するメカニズムを解明する.
    • 進化的に異なる洞窟生物の間での曲折誘導の差異の構造的基礎を調査する.

    主な方法:

    • クリオエレクトロントモグラフィー
    • 構造誘導型変異変異は,構造誘導型変異変異である.
    • 哺乳類の細胞の研究
    • 計算と理論的な分析を行います.

    主要な成果:

    • 進化的に異なる洞窟は,保存されたグローバルアーキテクチャにもかかわらず,多種多様な膜曲線誘導を示す.
    • 人間のCaveolin-1ディスクの水嫌性残渣パターンは,小葉片の変形と,その後の膜の曲折を誘発する.
    • 高解像度構造は,人間のCaveolin-1ディスクが,洞窟の内部でフンネルのような形状を採用し,膜構造を形作っていることを示しています.

    結論:

    • キャベオリン円盤は,細胞膜を彫刻し,再構築するために,特定の水性残留物配列を使用します.
    • カベオリン媒介の膜屈曲を制御する基本的な構造原理が明らかになった.
    • 発見は,膜動力学と細胞機能におけるケベオリンの役割についての洞察を提供します.