4-ヒドロキシプロリン4Sダイアステロエーマー4Sの偏差値
Matthew D Shoulders1, Frank W Kotch, Amit Choudhary
1Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
Journal of the American Chemical Society
|August 5, 2010
まとめ
プロリン残基上のヒドロキシル群の構成は,タンパク質構造に重大な影響を及ぼします. コラーゲンモデルに (2S,4S) -4-ヒドロキシプロリン (ハイプ) ダイアステレオマーを組み込むと,ユニークな構造特性と安定性が明らかになりました.
科学分野:
- バイオケミストリー バイオケミストリー
- 構造生物学 構造生物学とは
- タンパク質化学 タンパク質化学
背景:
- プロリル-4-ヒドロキシラーゼは,プロリン (Pro) 残基を,コラーゲンなどのタンパク質における (2S,4R) -4-ヒドロキシプロリン (Hyp) に変更する.
- この改変により,C ((gamma) -exoリングパッカーが適用され,コラーゲンのトリプルヘリックスが安定します.
- (2S,4S) -4-ヒドロキシプロリン (ハイプ) ダイアステロエーマーがタンパク質で観察されていない.
研究 の 目的:
- コラーゲンモデルシステムにヒプディアステロエーマーを組み込む効果を調査する.
- Hyp.と比較して,hypがタンパク質の構造と安定性にどのように影響するかを理解する.
主な方法:
- 密度関数理論 (DFT) の計算.密度関数理論 (DFT) の計算.密度関数理論 (DFT) の計算.密度関数理論 (DFT) の計算.密度関数理論 (DFT) の計算.密度関数理論 (DFT) の計算.密度関数理論 (DFT) の計算.
- 顕微鏡と結晶学. スペクトルと結晶学.
- コラーゲンモデルシステムに関するカロリメトリー研究.
主要な成果:
- Pro to hypの4S-ヒドロキシル化は,C ((gamma) -endoリングパッカーを強制する.
- ハイプにおける環横の水素結合は,主鎖の典型的なトルション角度を歪め,以前のペプチド結合を安定させる.
- hypを (2S,4S) -4-メトキシプロリン (mop) にOメチル化することで,この水素結合が除去され,標準的なC ((gamma) -endoパッカーが回復し,コラーゲンのトリプルヘリックス安定性が増加します.
結論:
- プロリン残基上のヒドロキシル群のステレオ化学的構成は,タンパク質の構造と安定性にとって極めて重要です.
- ハイプダイアステロエーマーにより,コラーゲンモデルに独特の構造と形状の性質が与えられます.
- Mop残基は,hip残基よりもコラーゲンのトリプルヘリックス安定性を高め,ヒドロキシル群の構成の重要性を強調する.
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