ガス相におけるペプチド結合の制御された形成
Sunyoung Lee1, Stephen J Valentine, James P Reilly
1Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States.
Journal of the American Chemical Society
|September 14, 2011
まとめ
真空紫外線を用いた陽子結合ペプチド複合体の光刺激により,水は除去され,より長いアミノ酸鎖が形成されます. これらの陽子結合ダイマーは,ペプチド形成における重要な中間物質であり,製品特異性はブロックグループを通じて制御できます.
科学分野:
- 物理化学 物理化学
- 化学物理 化学物理
- バイオ物理化学 バイオ物理化学
背景:
- 陽子結合ダイマーはペプチド形成経路に関与しています.
- ペプチド結合形成のダイナミクスを理解することは,生化学において極めて重要です.
研究 の 目的:
- ペプチド形成における陽子結合ダイマーの役割を調査する.
- 制御されたペプチド合成のための光刺激の利用を調査する.
主な方法:
- 157nmの真空紫外線を用いた陽子結合ペプチド複合体の光刺激.
- 水の除去と,その後の鎖の延長を分析する.
- 衝突誘発解離を用いた製品ペプチド配列の確認.
主要な成果:
- 水の除去とより長いアミノ酸鎖の形成が観察されました.
- 陽子結合ダイマーは,長寿命の中間物質として特定されました.
- 製品特異性は,特定の複合体を選択し,ブロックグループを使用することによって達成されました.
結論:
- 陽子結合ダイマーは,光誘導ペプチド形成における安定した中間物質である.
- 真空紫外線は,ペプチド合成のための制御可能な方法を提供します.
- N-またはC-末端ブロックグループは,ペプチド製品の特異性を制御することができます.
関連する概念動画
02:43Peptide Bonds
A peptide bond covalently attaches amino acids through a dehydration reaction. One amino acid's carboxyl group and another amino acid's amino group combine, releasing a water molecule. The resulting bond is the peptide bond. The products that such linkages form are peptides. As more amino acids join this growing chain, the resulting chain is a polypeptide. Each polypeptide has a free amino group at one end. This end has the N-terminal, or the amino-terminal, and the other end has a free...
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
01:13Protein Organization
Overview
01:24Protein Organization
Proteins are polymers of amino acid residues. They are versatile and responsible for different cellular functions, including DNA replication, molecular transport, catalysis, and structural support. Proteins have a hierarchical structure comprising at least three levels of organization: primary, secondary, and tertiary structure. Some large proteins have a quaternary structure where individual protein subunits are linked together.
The primary structure of a protein is its amino acid sequence.
The primary structure of a protein is its amino acid sequence.
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.