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関連する概念動画

Noncovalent Attractions in Biomolecules02:35

Noncovalent Attractions in Biomolecules

Noncovalent attractions are associations within and between molecules that influence the shape and structural stability of complexes. These interactions differ from covalent bonding in that they do not involve sharing of electrons.
Four types of noncovalent interactions are hydrogen bonds, van der Waals forces, ionic bonds, and hydrophobic interactions.
Hydrogen bonding results from the electrostatic attraction of a hydrogen atom covalently bonded to a strong-electronegative atom like oxygen,...
Noncovalent Attractions in Biomolecules02:35

Noncovalent Attractions in Biomolecules

Noncovalent attractions are associations within and between molecules that influence the shape and structural stability of complexes. These interactions differ from covalent bonding in that they do not involve sharing of electrons.
Four types of noncovalent interactions are hydrogen bonds, van der Waals forces, ionic bonds, and hydrophobic interactions.
Hydrogen bonding results from the electrostatic attraction of a hydrogen atom covalently bonded to a strong-electronegative atom like oxygen,...
Aqueous Solutions and Heats of Hydration02:42

Aqueous Solutions and Heats of Hydration

Water and other polar molecules are attracted to ions. The electrostatic attraction between an ion and a molecule with a dipole is called an ion-dipole attraction. These attractions play an important role in the dissolution of ionic compounds in water.
When ionic compounds dissolve in water, the ions in the solid separate and disperse uniformly throughout the solution because water molecules surround and solvate the ions, reducing the strong electrostatic forces between them. This process...
Cohesion01:07

Cohesion

Cohesion is the attraction between molecules of the same type, such as water molecules. Water molecules have an overall neutral charge but are polar molecule. An oxygen atom in one water molecule has a partial negative charge that can bind to a hydrogen atom with a partial positive charge in a second water molecule, forming a hydrogen bond. Each water molecule can form up to four hydrogen bonds with other water molecules. Hydrogen bonds are responsible for water's cohesive nature.
On a surface,...
Protein Folding01:22

Protein Folding

Overview
Intermolecular Forces03:13

Intermolecular Forces

Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen bonds, and dispersion...

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Improving 2D and 3D Skin In Vitro Models Using Macromolecular Crowding
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Improving 2D and 3D Skin In Vitro Models Using Macromolecular Crowding

Published on: August 22, 2016

タンパク質の混雑は,水分構造とダイナミクスに影響します.

Ryuhei Harada1, Yuji Sugita, Michael Feig

  • 1RIKEN Advanced Institute for Computational Science, 7-1-26 minatojima-minamimachi, Chuo-ku, Kobe, Hyogo 650-0047 Japan.

Journal of the American Chemical Society
|February 23, 2012
PubMed
まとめ
この要約は機械生成です。

タンパク質の混雑は,水の構造と動態を大幅に変化させ,拡散と介電定数を減少させます. これらの発見は,細胞環境と生物分子安定性についての洞察を提供します.

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Single-Molecule Diffusion and Assembly on Polymer-Crowded Lipid Membranes
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High-Resolution Neutron Spectroscopy to Study Picosecond-Nanosecond Dynamics of Proteins and Hydration Water
08:48

High-Resolution Neutron Spectroscopy to Study Picosecond-Nanosecond Dynamics of Proteins and Hydration Water

Published on: April 28, 2022

関連する実験動画

Last Updated: May 24, 2026

Improving 2D and 3D Skin In Vitro Models Using Macromolecular Crowding
09:14

Improving 2D and 3D Skin In Vitro Models Using Macromolecular Crowding

Published on: August 22, 2016

Single-Molecule Diffusion and Assembly on Polymer-Crowded Lipid Membranes
10:43

Single-Molecule Diffusion and Assembly on Polymer-Crowded Lipid Membranes

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High-Resolution Neutron Spectroscopy to Study Picosecond-Nanosecond Dynamics of Proteins and Hydration Water
08:48

High-Resolution Neutron Spectroscopy to Study Picosecond-Nanosecond Dynamics of Proteins and Hydration Water

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科学分野:

  • バイオフィジックス 生物物理学
  • コンピューティング・ケミストリー
  • 構造生物学 構造生物学とは

背景:

  • 細胞環境はマクロ分子に非常に混雑しています.
  • 水に対するマクロ分子混雑効果を理解することは,生物学的プロセスにとって極めて重要です.

研究 の 目的:

  • タンパク質の混雑が水の構造と動態に与える影響を調査する.
  • 混雑した環境下における水分化,拡散,介電性能的変化を分析する.

主な方法:

  • プロテインGとプロテインG/ヴィリンシステムの明示的な溶媒分子ダイナミクスシミュレーション.
  • ラディアル分布関数,水分補給部位,四面体協調の分析.
  • 異なるタンパク質濃度での自己拡散率と介電常数の測定.

主要な成果:

  • 水の構造は,混雑した状態で最初の溶解殻を超えて変化します.
  • 拡散率と介電常数は,タンパク質濃度が増加するにつれて線形的に減少します.
  • 水分子は,非常に混雑した環境では,制限されたダイナミクスを示します.

結論:

  • タンパク質の混雑は,水の構造的および動的特性に大きな影響を及ぼします.
  • 水のダイナミクスの低下は,細胞の水力動力学にも影響を及ぼします.
  • 低減された介電常数は,混雑した細胞環境における生物分子の安定性に影響を及ぼします.
  • 細胞環境での溶解をシミュレートするためのモデルを提供します.