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チャペロンネットワークをナビゲートする:hsp90チャペロンによって媒介される物理的および遺伝的相互作用の統合的地図
Rongmin Zhao1, Mike Davey, Ya-Chieh Hsu
1Department of Biochemistry, Medical Sciences Building, 1 King's College Circle, University of Toronto, Toronto, ON, M5S 1A8, Canada.
Cell
|March 16, 2005
まとめ
研究者らは,酵母における熱ショックタンパク質90 (Hsp90) チャペロンとの相互作用をマッピングし,649の物理的および遺伝的つながりのネットワークを明らかにした. この研究は,Hsp90を重要な細胞機能と表遺伝子の遺伝子調節と関連付けています.
科学分野:
- 分子生物学は分子生物学である.
- イースト遺伝学 イースト遺伝学
- プロテオミクス プロテオミクスは,プロテオミクスの
背景:
- 熱ショックタンパク質90 (Hsp90) は,タンパク質の折り畳みと安定性に関与する重要な分子チャペロンです.
- Hsp90の広範な相互作用ネットワークを理解することは,細胞プロセスにおけるその役割を明らかにするために不可欠です.
研究 の 目的:
- 酵母におけるHsp90の物理的,遺伝的,化学的-遺伝的相互作用を包括的にマッピングする.
- 新規のHsp90コファクターを特定し,その機能的つながりを理解する.
主な方法:
- 物理的な相互作用のための全ゲノム酵母2ハイブリッドスクリーン.
- Hsp90を含むタンパク質複合体の大規模な親和性浄化.
- 合成遺伝子配列 (SGA) 技術と,Hsp90阻害剤ゲルダナミシンを使用した化学遺伝子スクリーニング.
主要な成果:
- Hsp90を含む198の物理的および451の遺伝的/化学的-遺伝的相互作用の広範なネットワークが構築されました.
- 2つの新しいHsp90共因子,Tah1とPih1が特定されました.
- これらのコファクターは,Rvb1/Rvb2 DNAヘリケーズと相互作用し,Hsp90をクロマチンの改造と表遺伝的調節と結びつけることが判明しました.
結論:
- Hsp90は,幅広い細胞タンパク質と相互作用し,多様な細胞機能に影響を与えます.
- Tah1とPih1の特定により,HSP90の調節に関する知識が広がった.
- この研究は,Hsp90と,クロマチンのリモデリング機構との相互作用を通じて,表遺伝的遺伝子調節の間の直接的なリンクを確立しています.
関連する概念動画
Protein Networks
An organism can have thousands of different proteins, and these proteins must cooperate to ensure the health of an organism. Proteins bind to other proteins and form complexes to carry out their functions. Many proteins interact with multiple other proteins creating a complex network of protein interactions.
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
Molecular Chaperones and Protein Folding
The native conformation of a protein is formed by interactions between the side chains of its constituent amino acids. When the amino acids cannot form these interactions, the protein cannot fold by itself and needs chaperones. Notably, chaperones do not relay any additional information required for the folding of polypeptides; the native conformation of a protein is determined solely by its amino acid sequence. Chaperones catalyze protein folding without being a part of the folded protein.
The...
The...
Covalently Linked Protein Regulators
Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
These groups modify specific amino acids in a protein.
These groups modify specific amino acids in a protein.
Protein Networks
An organism can have thousands of different proteins, and these proteins must cooperate to ensure the health of an organism. Proteins bind to other proteins and form complexes to carry out their functions. Many proteins interact with multiple other proteins creating a complex network of protein interactions.
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
Molecular Chaperones and Protein Folding
The native conformation of a protein is formed by interactions between the side chains of its constituent amino acids. When the amino acids cannot form these interactions, the protein cannot fold by itself and needs chaperones. Notably, chaperones do not relay any additional information required for the folding of polypeptides; the native conformation of a protein is determined solely by its amino acid sequence. Chaperones catalyze protein folding without being a part of the folded protein.
The...
The...
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,...
Interaction domains in cell signaling
Interaction domains recognize exposed features of their binding partners containing post-translationally modified sequences,...

