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Protein Complexes with Interchangeable Parts01:57

Protein Complexes with Interchangeable Parts

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Assembly of Signaling Complexes01:30

Assembly of Signaling Complexes

5.9K
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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Protein Complex Assembly02:41

Protein Complex Assembly

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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...
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The Supercomplexes in the Crista Membrane01:41

The Supercomplexes in the Crista Membrane

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The mitochondrial cristae membrane is the primary site for the oxidative phosphorylation (OXPHOS) process of energy conversion mediated through respiratory complexes I to V. These complexes have been widely studied for decades, and it has been proven that they form supramolecular structures called respiratory supercomplexes (SC). These higher-order complexes may be crucial in maintaining the biochemical structure and improving the physiological activity of the individual complexes while...
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The Structure of Intermediate Filaments01:19

The Structure of Intermediate Filaments

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The intermediate filaments are one of three widely studied cytoskeletal filaments. They are so named as their diameter (10 nm) is in between that of microfilaments (7 nm) and the microtubules (25 nm).  These filaments are highly stable and can remain intact when exposed to high salt concentrations and detergents. These filaments are responsible for providing stability and mechanical support to the cells. They also help in cell adhesion and maintaining tissue integrity.
Intermediate...
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Mechanisms of Membrane Domain Formation00:59

Mechanisms of Membrane Domain Formation

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Different physical properties of lipids and proteins allow them to localize and form distinct islands or domains in the membrane. Some membrane domains are formed due to protein-protein interactions, whereas others are formed due to the presence of specific lipids such as sphingolipids and sterols—for example, large proteins, such as bacteriorhodopsin, aggregate and create distinct domains.
Another mechanism for membrane domain formation involves membrane proteins interacting with...
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Author Spotlight: Evaluating Biophysical Assays for Characterizing PROTACS Ternary Complexes
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スナップショット:メディエーター複合構造

Shraddha Nayak1, Dylan J Taatjes2

  • 1MRC Laboratory of Molecular Biology, Cambridge, UK.

Cell
|September 2, 2022
PubMed
まとめ
この要約は機械生成です。

遺伝子の転写に不可欠なメディエーター複合体は 酵母から人間への構造を保存しています ヒューマン・メディエーターは より大きく より乱雑で イーストと比べると 独特のサブユニットを含んでいます

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Analyzing Protein Architectures and Protein-Ligand Complexes by Integrative Structural Mass Spectrometry
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Characterization of Multi-subunit Protein Complexes of Human MxA Using Non-denaturing Polyacrylamide Gel-electrophoresis
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関連する実験動画

Last Updated: Aug 30, 2025

Author Spotlight: Evaluating Biophysical Assays for Characterizing PROTACS Ternary Complexes
07:22

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Analyzing Protein Architectures and Protein-Ligand Complexes by Integrative Structural Mass Spectrometry
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Characterization of Multi-subunit Protein Complexes of Human MxA Using Non-denaturing Polyacrylamide Gel-electrophoresis
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科学分野:

  • 分子生物学
  • 遺伝子規制
  • タンパク質複合体

背景:

  • メディエーター複合体は,ゲノム全体のRNAポリメラーゼII転写の重要なレギュラーである.
  • 人体では26つのサブユニットで構成され,それに関連する4つのサブユニットキナーゼモジュールがあります.
  • 媒介者の構造は イーストと人間の間の保存を示しますが 人間の媒介者はより大きく より複雑です

研究 の 目的:

  • 人間のメディエーター複合体の構造的概要を提示する.
  • 人間と酵母メディエーター複合体の違いと類似性を強調する.
  • 人間のメディエーター複合体内の構成と潜在的動的関連を詳細に説明する.

主な方法:

  • 人間のメディエーター複合体の構造分析
  • 酵母媒介体の構造との比較分析
  • 人間特有のサブユニットとキナーゼモジュールの識別と特徴付け

主要な成果:

  • ヒューマン・メディエーターは イーストよりも大きく 構造的に混乱しています
  • ヒトのメディエーター複合体にはメタゾーン特有のサブユニットが含まれています.
  • 4つのサブユニットキナーゼモジュールは,コアメディエーター複合体と逆向きに結合することができる.

結論:

  • ヒューマン・メディエーターは複雑でダイナミックな構造を示し,ゲノム全体の転写における複雑な役割を反映しています.
  • 独特のサブユニットとキナーゼモジュールの存在は,メタゾーンにおける特殊な調節機能を示唆している.
  • ヒトのメディエーター構造を理解することは,遺伝子発現の調節におけるその役割を解読するために不可欠です.