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関連する概念動画

Protein Complex Assembly02:41

Protein Complex Assembly

Proteins can form homomeric complexes with another unit of the same protein or heteromeric complexes with different types.  Most protein complexes self-assemble spontaneously via ordered pathways, while some proteins need assembly factors that guide their proper assembly. Despite the crowded intracellular environment, proteins usually interact with their correct partners and form functional complexes.
Many viruses self-assemble into a fully functional unit using the infected host cell to...
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...
Assembly of Complex Microtubule Structures01:32

Assembly of Complex Microtubule Structures

Complex microtubule structures are present in resting cells and in dividing cells. In resting cells, they are responsible for maintaining the cellular architecture, tracks for intracellular transport, positioning of organelles, assembly of cilia and flagella. They mediate the bipolar spindle assembly for chromosomal segregation and positioning of the cell division plate in dividing cells. The formation of microtubule complex structures depends on the cell type, cell stage, and cell function.
Protein Complex Assembly02:41

Protein Complex Assembly

Proteins can form homomeric complexes with another unit of the same protein or heteromeric complexes with different types.  Most protein complexes self-assemble spontaneously via ordered pathways, while some proteins need assembly factors that guide their proper assembly. Despite the crowded intracellular environment, proteins usually interact with their correct partners and form functional complexes.
Many viruses self-assemble into a fully functional unit using the infected host cell to...
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...
Assembly of Signaling Complexes01:30

Assembly of Signaling Complexes

Multiprotein signaling complexes are formed in a dynamic process involving protein-protein interactions at the cytoplasmic domain of transmembrane receptors or enzymatic and non-enzymatic proteins associated with the receptor. These complexes ensure the activation and propagation of intracellular signals that regulate cell functions.
Interaction domains in cell signaling
Interaction domains recognize exposed features of their binding partners containing post-translationally modified sequences,...

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関連する実験動画

Updated: Jun 7, 2026

Formation of Ordered Biomolecular Structures by the Self-assembly of Short Peptides
07:26

Formation of Ordered Biomolecular Structures by the Self-assembly of Short Peptides

Published on: November 21, 2013

アセンブリは,タンパク質複合体の進化を反映しています.

Emmanuel D Levy1, Elisabetta Boeri Erba, Carol V Robinson

  • 1MRC Laboratory of Molecular Biology, Hills Road, Cambridge CB2 2QH, UK. homomers@mrc-lmb.cam.ac.uk

Nature
|June 20, 2008
PubMed
まとめ
この要約は機械生成です。

タンパク質ホモマー組立と進化は,保存された経路を共有しています. この研究は,タンパク質の四次構造の進化が細胞の組み立てを反映し,結晶構造からの予測を可能にすることを明らかにしています.

さらに関連する動画

Examining Proteasome Assembly with Recombinant Archaeal Proteasomes and Nondenaturing PAGE: The Case for a Combined Approach
09:57

Examining Proteasome Assembly with Recombinant Archaeal Proteasomes and Nondenaturing PAGE: The Case for a Combined Approach

Published on: December 17, 2016

Directed Assembly of Elastin-like Proteins into defined Supramolecular Structures and Cargo Encapsulation In Vitro
10:01

Directed Assembly of Elastin-like Proteins into defined Supramolecular Structures and Cargo Encapsulation In Vitro

Published on: April 8, 2020

関連する実験動画

Last Updated: Jun 7, 2026

Formation of Ordered Biomolecular Structures by the Self-assembly of Short Peptides
07:26

Formation of Ordered Biomolecular Structures by the Self-assembly of Short Peptides

Published on: November 21, 2013

Examining Proteasome Assembly with Recombinant Archaeal Proteasomes and Nondenaturing PAGE: The Case for a Combined Approach
09:57

Examining Proteasome Assembly with Recombinant Archaeal Proteasomes and Nondenaturing PAGE: The Case for a Combined Approach

Published on: December 17, 2016

Directed Assembly of Elastin-like Proteins into defined Supramolecular Structures and Cargo Encapsulation In Vitro
10:01

Directed Assembly of Elastin-like Proteins into defined Supramolecular Structures and Cargo Encapsulation In Vitro

Published on: April 8, 2020

科学分野:

  • バイオケミストリー バイオケミストリー
  • 構造生物学 構造生物学とは
  • 進化生物学の進化生物学について

背景:

  • ホモマーは,自己相互作用するタンパク質単位によって形成され,アロステリーのような細胞機能に不可欠です.
  • ホモマーの誤った組み立ては,様々な疾患に関連しており,その構造的重要性を強調しています.
  • ホモメールの流行 (50-70%の知られている四次元の状態) にかかわらず,ホモメールの進化とアセンブリメカニズムは十分に理解されていません.

研究 の 目的:

  • ホモマー四分構造の進化的保存を調査する.
  • ホモメールの進化経路とそれらの細胞内組立過程の関係を解明する.
  • 構造データに基づくタンパク質複合体の進化と組み立ての予測モデルを開発する.

主な方法:

  • 5,000以上のユニークな原子構造の分析.
  • タンパク質の家族を比較分析して,四次構造の保存を評価する.
  • 複雑な組み立て経路を研究するために,サブユニットインターフェースと質量スペクトロメトリーの混乱.

主要な成果:

  • ホモマー四分構造は,≥30%の配列同一性を持つ70%以上のタンパク質ペアで保存されています.
  • タンパク質が四分格構造型から四分格構造型へ移行する際には,明確に定義された進化経路が存在します.
  • 細胞内 (分解) 解体経路は,進化的経路を模倣することが示されました.

結論:

  • タンパク質の進化と組み立ての経路は分子的に類似しており,ヘーケルの発達パラダイムを反映しています.
  • この研究は,タンパク質複合体の進化と結晶構造からの組成を予測するためのモデルを提供します.
  • これらの保存されたメカニズムの理解は,病気の洞察と,新しい分子機械の設計の可能性を提供します.