ディイロンのタンパク質は,バリン-フェニララリンクロスリンクを自動生成します
Richard B Cooley1, Timothy W Rhoads, Daniel J Arp
1Department of Biochemistry and Biophysics, 2011 Agriculture and Life Sciences Building, Oregon State University, Corvallis, OR 97331, USA.
Science (New York, N.Y.)
|May 21, 2011
まとめ
研究者は,機能のないタンパク質のサイドチェーン間の新しい炭素-炭素クロスリンクを発見しました. この独特のバリン-フェニララニン結合は,二鉄中心によって安定させられ,新しい翻訳後の改変の可能性を明らかにします.
科学分野:
- バイオケミストリー バイオケミストリー
- タンパク質化学 タンパク質化学
- 酵素学 酵素学とは
背景:
- タンパク質の内部共性クロスリンクは,通常,機能化されたグループを必要とします.
- 酸素,窒素,または硫黄の原子は,通常,クロスリンク形成の促進に関与しています.
研究 の 目的:
- 新種のタンパク質クロスリンクの発見を報告する.
- 非機能化されたアミノ酸のサイドチェーン間の炭素-炭素のクロスリンクを特徴付けるために.
主な方法:
- 研究されたタンパク質のクロスリンクメカニズム.
- ヴァリン-フェニララリンクロスリンクの形成を分析した.
- 反応におけるカルボキシラート橋渡しダイアイロンの中心の役割を研究した.
主要な成果:
- ヴァリンとフェニララニンのサイドチェーン間の直接的な炭素-炭素クロスリンクを特定しました.
- クロスリンク形成は酸素に依存していることが実証されました.
- ダイアイロンの中心が,このユニークなクロスリンクを触媒化し安定させることを示した.
結論:
- この発見は,翻訳後の改変の新種を表しています.
- ディイロンのセンターは,既知の機能を超えた新しい触媒的潜在能力を発揮します.
- この発見は,タンパク質のクロスリンクの既存のパラダイムに挑戦しています.
関連する概念動画
02:04Covalently 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.
02:04Covalently 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.
01:26Protein Modifications in the RER
Modification of secretory and transmembrane proteins entering the rough ER begins in the ER lumen. These modifications aid in protein folding and stabilize the acquired tertiary structure. Protein modifications in the rough ER co-occur at different stages of protein folding.
Broadly, these modifications can be categorized into four main categories — glycosylation, formation of disulfide bonds, assembly of protein subunits, and specific proteolytic cleavages like removal of signal sequences.
Broadly, these modifications can be categorized into four main categories — glycosylation, formation of disulfide bonds, assembly of protein subunits, and specific proteolytic cleavages like removal of signal sequences.
01:25Protein 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 Structure Is Critical to Its Biological Function
Proteins perform a wide range of biological functions such as catalyzing chemical reactions, providing...
01:22Protein Folding
Overview
01:22Protein Folding
Overview