構成のエントロピーとリガンド結合とジメリゼーションの間の協力性は,グリコペプチド抗生物質のジメリゼーションとジメリゼーションの間の協力性です
Sutjano Jusuf1, Patrick J Loll, Paul H Axelsen
1Department of Pharmacology, University of Pennsylvania, Philadelphia 19104, USA.
Journal of the American Chemical Society
|March 27, 2003
まとめ
グリコペプチド抗生物質は,構造的な変化なしに協力性を示す. リガンド結合と二酸化は,構造的シフトではなく,変化した振動活動によって引き起こされる,エントロピーコストの減少により,協力的である.
科学分野:
- バイオケミストリー バイオケミストリー
- 分子生物物理学 分子生物物理学
- 化学生物学 化学生物学とは
背景:
- オリゴメリゼーションとリガンド結合は,しばしば協力的で,通常は構造的変化によって引き起こされます.
- グリコペプチド抗生物質は,重要な構造的変化なしに協力結合を示し,メカニズムに関する疑問を投げかけます.
研究 の 目的:
- 主要な構造変化がない場合に,グリコペプチド抗生物質における協力性のメカニズムを調査する.
- 変化した振動動力学が観察された協力性を説明できるかどうかを判断する.
主な方法:
- クロロレロロモミシン,バンコミシン,デクロロバンコミシンの完全ソルバット分子動態シミュレーション.
- 準ハーモニックの正常モード分析により,構成エントロピーを導出します.
- リガンドフリーおよびリガンド結合のモノメリックおよび二重形の分析.
主要な成果:
- リガンド結合と二酸化の両方には,振動モードのより高い周波数とより低い振幅へのシフトによって示されるエントロピックコストが伴う.
- リガンド結合と二酸化の合体エントロピーコストは,個々のコストの合計より小さい.
- 構成エントロピーの減少は,実験的に観察された協力性を十分に説明します.
結論:
- 生化学的な協力性は,重要な構造的変化とは関係なく,振動活動の変化によって媒介され得る.
- この変化した振動ダイナミクスのメカニズムは,さまざまなマクロ分子システムにおける一般的なアロステリック原理を表す可能性があります.
- グリコペプチド抗生物質の協力性は,構造の変化ではなく,振動モードにおけるエントロピック貯蓄から生じる.
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