関連する実験動画
Updated: Jan 24, 2026
10:58
Protein WISDOM: A Workbench for In silico De novo Design of BioMolecules
Published on: July 25, 2013
17.6K
調節可能なpH駆動型変化のデノボ設計
Scott E Boyken1,2, Mark A Benhaim3, Florian Busch4
1Department of Biochemistry, University of Washington, Seattle, WA 98195, USA.
Science (New York, N.Y.)
|May 18, 2019
まとめ
特定の酸度で形を変えた タンパク質を設計しました これらの新しいタンパク質は プログラム可能なタンパク質の形状の変化を示し 細胞膜を壊すことができます
科学分野:
- タンパク質工学
- 生物化学
- 分子生物学
背景:
- タンパク質の形状の変化は 生物学的機能に不可欠です
- 変換可能な形状を持つタンパク質を 設計することは大きな課題です
- これまでのデノボタンパク質の設計は 単一の安定状態に焦点を当てていました
研究 の 目的:
- pHに対応するタンパク質構成スイッチの設計のための一般的な戦略を開発する.
- タンパク質の構造の変化を環境の pH に基づいて正確に制御する.
- 環境が誘発する機能を 持つ新しいタンパク質を作り出すこと
主な方法:
- 埋もれた水素結合ネットワークで,事前に組織されたヒスティジン残基でタンパク質の構造を設計する.
- ホモトリマーとヘテロディマーの生成 制御されたヒスティジン含有量と水害性相互作用
- タンパク質の安定性, pHの変動による形状の変化,膜破壊能力を評価する.
主要な成果:
- 安定したホモトリマーとヘテロディーマーを成功裏に設計し,pH6.5以下で大規模な形状変化を経験した.
- ヒスティジンネットワークと水害性相互作用を調節することによって,移行pHと協力性を制御することが示された.
- 設計されたタンパク質によって分解された脂質膜の in vitro および in vivo 破壊が観察されました.
結論:
- 環境によって引き起こされるタンパク質の構成の変化を de novo デザインでプログラムするための一般的な戦略が確立されています.
- 設計されたヒスティジンベースのネットワークは,pH反応性タンパク質の動作を正確に制御できます.
- これらのエンジニアリングされたタンパク質は,標的型の膜破壊を必要とするアプリケーションの可能性を示している.
関連する概念動画
01:20Conformity
47.9K
Conformity is the change in a person’s behavior to go along with the group, even if that person does not agree with the group.
47.9K
02:20Conformations of Butane
17.8K
Unlike ethane and propane that have only two major conformations, butane has more than two conformers. The staggered form of butane in which the bulky methyl groups on the two carbons are placed on opposite sides, that is, at a dihedral angle of 180°, is the lowest energy, most stable form — called the anti conformer. This conformation is stabilized due to the absence of steric repulsion between the largely spaced out methyl groups. The other two staggered conformations are...
17.8K
02:29Conformations of Cycloalkanes
14.2K
Adolf von Baeyer attempted to explain the instabilities of small and large cycloalkane rings using the concept of angle strain — the strain caused by the deviation of bond angles from the ideal 109.5° tetrahedral value for sp3 hybridized carbons. However, while cyclopropane and cyclobutane are strained, as expected from their highly compressed bond angles, cyclopentane is more strained than predicted, and cyclohexane is virtually strain-free. Hence, Baeyer’s theory that...
14.2K
02:11Conformations of Cyclohexane
15.3K
Cyclohexane does not exist in a planar form due to the high angle and torsional strain it would experience in the planar structure. Instead, it adopts non-planar chair and boat conformations.
The chair form is the most stable and derives its name from its resemblance to the “easy chair.” In the chair conformation, two carbon atoms are arranged out-of-plane — one above and one below, minimizing the torsional strain. In the chair form, the bond angle is very close to the ideal...
The chair form is the most stable and derives its name from its resemblance to the “easy chair.” In the chair conformation, two carbon atoms are arranged out-of-plane — one above and one below, minimizing the torsional strain. In the chair form, the bond angle is very close to the ideal...
15.3K
02:01Group Design
10.3K
The most basic experimental design involves two groups: the experimental group and the control group. The two groups are designed to be the same except for one difference— experimental manipulation. The experimental group gets the experimental manipulation—that is, the treatment or variable being tested—and the control group does not. Since experimental manipulation is the only difference between the experimental and control groups, we can be sure that any differences between...
10.3K
02:18Conformations of Ethane and Propane
16.9K
In an organic molecule, free rotation about the carbon-carbon single bond results in energetically different conformers of the molecule. Due to this rotation, called the internal rotation, ethane has two major conformations — staggered and eclipsed.
Staggered conformation is a low energy and more stable conformation with the C-H bonds on the front carbon placed at 60°dihedral angles relative to the C-H bonds on the back carbon, leading to a reduced torsional strain. In staggered...
Staggered conformation is a low energy and more stable conformation with the C-H bonds on the front carbon placed at 60°dihedral angles relative to the C-H bonds on the back carbon, leading to a reduced torsional strain. In staggered...
16.9K