G タンパク質 と L タンパク質 と その ミュータント の 折り畳み 機構 の 解読
Liwei Chang1,2, Alberto Perez1,2
1Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States.
Journal of the American Chemical Society
|August 5, 2022
まとめ
タンパク質の折り畳みメカニズムを 詳細に説明するための 統一された計算手法を開発しました この方法は,実験データと整合して,GとLタンパク質とその変異体の折り畳み経路を正確に予測します.
科学分野:
- コンピュータ生物学
- タンパク質の折りたたみ力学
- バイオ物理学
背景:
- タンパク質の折り畳みメカニズムを理解することは 分子生物学にとって極めて重要です
- φ と ψ 値の分析のような実験的方法は,折り畳み経路の洞察を提供します.
- タンパク質GとLは 類似のトポロジーを表していますが 折りたたみのメカニズムは異なります
研究 の 目的:
- シミュレーションとベイジアン推論を組み合わせた 統一された計算アプローチを導入する.
- タンパク質G,L,およびその変異体の折りたたみメカニズムの原子学的詳細を提供する.
- 実験データと正方形の方法に対して計算アプローチを検証する.
主な方法:
- ベイジアン推論と分子シミュレーションを組み合わせた
- マルコフ状態モデルによるアダプティブサンプリング分子動力学 (MD)
- フラグメント分解分析 アルファフォールド
主要な成果:
- 統一されたアプローチは,4つのタンパク質 (G,L,および変異体) の折り畳みメカニズムを正確に特定しました.
- この方法は,実験結果と一致する,トランジション・ステート・アンサンブル (TSE) と中間構造を正しく予測した.
- オートゴーナル法では,タンパク質Gの複雑な折り畳み経路が確認され,二次構造の好みも特定されました.
結論:
- 開発されたベイジアン推論アプローチは,タンパク質の折り畳みを解明するために計算的に効率的で信頼性があります.
- この研究では 原子の折り畳み経路の詳細が示され タンパク質の動態に関する新しい洞察が得られました
- 発見はタンパク質の折りたたみメカニズムを予測し理解するための堅固な枠組みを提供します.
関連する概念動画
Protein Folding
8.4K
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 Structure Is Critical to Its Biological Function
Proteins perform a wide range of biological functions such as catalyzing chemical reactions, providing...
8.4K
Molecular Chaperones and Protein Folding
18.3K
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...
18.3K
Protein and Protein Structure
80.7K
Proteins are one of the most abundant organic molecules in living systems and have the most diverse range of functions of all macromolecules. Proteins may be structural, regulatory, contractile, or protective. They may serve in transport, storage, or membranes; or they may be toxins or enzymes. Their structures, like their functions, vary greatly. They are all, however, amino acid polymers arranged in a linear sequence.
A protein's shape is critical to its function. For example, an enzyme...
A protein's shape is critical to its function. For example, an enzyme...
80.7K
Amyloid Fibrils
9.8K
Amyloid fibrils are aggregates of misfolded proteins. Under most circumstances, misfolded proteins are either refolded by chaperone proteins or degraded by the proteasome. However, in the case of a mutation or a disease, these proteins can accumulate to form large clusters and often further assemble to form elongated fibers, called fibrils.
Amyloid deposits were observed as early as 1639 in the liver and the spleen. In 1854, Rudolph Virchow performed iodine staining,...
Amyloid deposits were observed as early as 1639 in the liver and the spleen. In 1854, Rudolph Virchow performed iodine staining,...
9.8K
Protein Complexes with Interchangeable Parts
2.6K
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...
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...
2.6K
Protein Folding Quality Check in the RER
3.8K
ER is the primary site for the maturation and folding of soluble and transmembrane secretory proteins. The calnexin cycle is a specific chaperone system that folds and assesses the confirmation of N-glycosylated proteins before they can exit the ER lumen. The primary players of this quality check pipeline are the lectins, ER-resident chaperones, and a glucosyl transferase enzyme. In case the calnexin system in the lumen fails to salvage a misfolded protein, it is transported to the cytoplasm...
3.8K


