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Directing Proteins to the Rough Endoplasmic Reticulum01:34

Directing Proteins to the Rough Endoplasmic Reticulum

The organelle-specific signaling sequences direct proteins synthesized in the cytosol to their final destination like ER, mitochondria, peroxisomes, etc. Some of the proteins directed to ER are then trafficked via vesicles to other organelles within the cell or the extracellular environment through the Golgi complex. For example, the rough ER synthesizes soluble proteins for transportation to the lysosomes or secretion out of the cell. It can also synthesize transmembrane proteins that can...
Conservation of Protein Domains Over Different Proteins02:26

Conservation of Protein Domains Over Different Proteins

Protein domains are small structurally independent units that are part of a single amino acid chain.  Although these domains are often structurally independent, they may rely on synergistic effects to perform their functions as part of a larger protein. Protein domains may be conserved within the same organism, as well as across different organisms.
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to form...
Protein Complexes with Interchangeable Parts01:57

Protein Complexes with Interchangeable Parts

Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order to...
Conservation of Protein Domains02:26

Conservation of Protein Domains

Protein domains are small structurally independent units that are part of a single amino acid chain.  Although these domains are often structurally independent, they may rely on synergistic effects to perform their functions as part of a larger protein. Protein domains may be conserved within the same organism, as well as across different organisms.
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to form...
Protein Folding01:25

Protein Folding

Proteins are chains of amino acids linked together by peptide bonds. Upon synthesis, a protein folds into a three-dimensional conformation, critical to its biological function. Interactions between its constituent amino acids guide protein folding, and hence the protein structure is primarily dependent on its amino acid sequence.
Protein Structure Is Critical to Its Biological Function
Proteins perform a wide range of biological functions such as catalyzing chemical reactions, providing...
Protein Folding01:22

Protein Folding

Overview

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Directed Protein Packaging within Outer Membrane Vesicles from Escherichia coli: Design, Production and Purification
10:21

Directed Protein Packaging within Outer Membrane Vesicles from Escherichia coli: Design, Production and Purification

Published on: November 16, 2016

タンパク質の容器の方向化された進化.

Bigna Wörsdörfer1, Kenneth J Woycechowsky, Donald Hilvert

  • 1Laboratory of Organic Chemistry, Eidgenössische Technische Hochschule (ETH) Zürich, 8093 Zürich, Switzerland.

Science (New York, N.Y.)
|February 5, 2011
PubMed
まとめ
この要約は機械生成です。

研究者は,タンパク質ナノコンパートメントを設計して,HIVプロテアゼのような有毒な酵素を細胞内に安全に閉じ込めるようにしました. この方法により,宿主細胞の成長が改善され,バイオテクノロジーの応用のために,より高い酵素負荷容量を持つ強化カプシドの開発につながりました.

さらに関連する動画

A New Screening Method for the Directed Evolution of Thermostable Bacteriolytic Enzymes
13:30

A New Screening Method for the Directed Evolution of Thermostable Bacteriolytic Enzymes

Published on: November 7, 2012

Directed Evolution Method in Saccharomyces cerevisiae: Mutant Library Creation and Screening
10:50

Directed Evolution Method in Saccharomyces cerevisiae: Mutant Library Creation and Screening

Published on: April 1, 2016

関連する実験動画

Last Updated: Jun 4, 2026

Directed Protein Packaging within Outer Membrane Vesicles from Escherichia coli: Design, Production and Purification
10:21

Directed Protein Packaging within Outer Membrane Vesicles from Escherichia coli: Design, Production and Purification

Published on: November 16, 2016

A New Screening Method for the Directed Evolution of Thermostable Bacteriolytic Enzymes
13:30

A New Screening Method for the Directed Evolution of Thermostable Bacteriolytic Enzymes

Published on: November 7, 2012

Directed Evolution Method in Saccharomyces cerevisiae: Mutant Library Creation and Screening
10:50

Directed Evolution Method in Saccharomyces cerevisiae: Mutant Library Creation and Screening

Published on: April 1, 2016

科学分野:

  • 合成生物学 合成生物学とは
  • バイオテクノロジー バイオテクノロジー
  • プロテイン工学は,タンパク質の

背景:

  • タンパク質のナノコンパートメントに酵素を閉じ込めることは,細胞の触媒活動を制御するための戦略を提供します.
  • HIVプロテアゼのような有毒な酵素は,宿主毒性のために細胞内生産に課題をもたらす.

研究 の 目的:

  • エンジニアリングされたタンパク質カプシド内の有毒な酵素を隔離する方法を開発する.
  • 誘導進化によってカプシドの性質を向上させ,酵素の封じ込めと宿主保護を向上させる.
  • 生体細胞におけるバイオテクノロジーの応用のためのエンジニアリングされたナノコンパートメントの可能性を調査する.

主な方法:

  • タンパク質の封じ込みをするために静電ベースのタギングシステムを利用しました.
  • エンジニアリングされたルマジン合成カプシドは,Escherichia coliのHIVプロテアスを隔離します.
  • カプシドの性能を高めるために,変異発生と選択を含む,指向的な進化を採用した.

主要な成果:

  • エンジニアリングされたルマジン合成酵素カプシドの中で,有毒なHIVプロテアスを成功裏に隔離した.
  • 進化の4ラウンド後にカプシドの負荷能力の5〜10倍の増加を達成しました.
  • HIVプロテアゼの高細胞内濃度にもかかわらず,効率的な宿主細胞成長が実証されています.
  • 特定された突然変異は,カプシドの光面に負の電荷を増加させ,静電相互作用を強化します.

結論:

  • エンジニアリングされたタンパク質ナノコンパートメントは,細胞内の有毒な酵素活性を管理するための堅牢なプラットフォームを提供します.
  • 誘導進化により,酵素負荷能力が著しく向上した,改良されたカプシドが得られます.
  • これらの高度なナノコンパートメントは,生物システムにおける多様なバイオテクノロジーの応用を約束しています.