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関連する概念動画

Protein-protein Interfaces02:04

Protein-protein Interfaces

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Many proteins form complexes to carry out their functions, making protein-protein interactions (PPIs) essential for an organism's survival. Most PPIs are stabilized by numerous weak noncovalent chemical forces. The physical shape of the interfaces determines the way two proteins interact. Many globular proteins have closely-matching shapes on their surfaces, which form a large number of weak bonds. Additionally, many PPIs occur between two helices or between a surface cleft and a...
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Protein-Protein Interfaces02:04

Protein-Protein Interfaces

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Electrochemical Gradient and Channel Proteins: An Overview01:21

Electrochemical Gradient and Channel Proteins: An Overview

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An electrochemical gradient is a fundamental concept in biology and chemistry. It regulates the movement of ions across cell membranes. This movement is influenced by two factors:
The electrical gradient: The electrical gradient across cell membranes refers to the difference in electric charge between the inside and outside of a cell.  This difference drives the movement of ions towards or away from the cells. For instance, if the inside of the cell is more negatively charged relative to...
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Tight Junctions01:29

Tight Junctions

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Tight junctions are molecular seals between cells that prevent the leaking of fluids, ions, and other small solutes across cavities and compartments in multicellular organisms. They are mainly composed of claudin and occludin transmembrane proteins, and other proteins such as tricellulin and JAM (junctional adhesion molecule). All these proteins are 4-pass transmembrane proteins, except JAM, which is a single-pass transmembrane protein belonging to the immunoglobulin superfamily. The...
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Gap Junctions01:37

Gap Junctions

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Multicellular organisms employ a variety of ways for cells to communicate with each other. Gap junctions are specialized proteins that form pores between neighboring cells in animals, connecting the cytoplasm between the two, and allowing for the exchange of molecules and ions. They are found in a wide range of invertebrate and vertebrate species, mediate numerous functions including cell differentiation and development, and are associated with numerous human diseases, including cardiac and...
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Gap Junctions01:27

Gap Junctions

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The cytoplasm of adjacent animal cells can exchange small molecules, ions, and secondary messengers via the communication channels which form the gap junctions. These junctions comprise a few hundred to thousands of molecular channels, each made of two halves, called the connexon hemichannel. A connexon is a hexamer of six transmembrane connexin proteins, which assemble radially, thus forming a pore or channel in the center. One connexon hemichannel docks with a corresponding connexon on the...
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Engineering Cell-permeable Protein
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Engineering Cell-permeable Protein

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生物工学 で 単一 の タンパク質 の 結合 を 設計 する

Marta P Ruiz1,2,3, Albert C Aragonès1,2,3, Nuria Camarero2,3

  • 1Departament of Materials Science and Physical Chemistry & Institute of Theoretical and Computational Chemistry (IQTCUB), University of Barcelona , Martí i Franquès, 1, Barcelona 08028, Spain.

Journal of the American Chemical Society
|October 6, 2017
PubMed
まとめ
この要約は機械生成です。

研究者は単一の変異によって 単一のタンパク質で電荷輸送を設計しました この変異により 電子の移転は2段階のプロセスから 直接的なトンネリングへと変化し バイオエレクトロニクス特性に対する制御が示されました

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OaAEP1-Mediated Enzymatic Synthesis and Immobilization of Polymerized Protein for Single-Molecule Force Spectroscopy
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Monitoring the Assembly of a Secreted Bacterial Virulence Factor Using Site-specific Crosslinking
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科学分野:

  • バイオ電子
  • ナノテクノロジー
  • タンパク質工学

背景:

  • ナノスケールの電子プラットフォームを設計するには,生物分子センサーユニットと信号伝達のための電子プラットフォームをインタフェースする必要があります.
  • バイオ分子回路の電気シグネチャを理解することは 電気特性を調整するために不可欠です

研究 の 目的:

  • 単一タンパク質の電気コンタクトで 生物工学による電荷輸送を証明する
  • 単一点位変異が タンパク質の電荷輸送行動に及ぼす影響を調べるため

主な方法:

  • Cu-アズリンを用いた単タンパク質の電気コンタクトの製造.
  • 単一ポイントサイト変異の導入
  • 顕微鏡研究と分子動力学シミュレーション
  • 境界軌道に関する密度関数理論 (DFT) の計算.

主要な成果:

  • 単一の突然変異により,電荷の輸送方式は 量子媒介による2段階輸送から 直接的なコヒーレントトンネリングに劇的に変化した.
  • タンパク質ブルーのCu部位の軽微な構造的変形が観察されました.
  • タンパク質の折りたたみ構造は単一タンパク質の結合に保存された.
  • DFT分析は,観測された電荷輸送の差異におけるCu中心の関与を示唆した.

結論:

  • 外部変異によるタンパク質の背骨内の電荷輸送を直接制御することが示された.
  • 構造に関連する生物学的電子移転を研究するためのナノスケールプラットフォームを確立しました.
  • バイオエレクトロニクス機器におけるタンパク質の電気的特性を調整するためのバイオエンジニアリングの可能性を強調した.