プロアポプトシス分子BIDの溶液構造:アポプトシスアゴニストとアンタゴニストの構造的基礎

J M McDonnell¹, D Fushman, C L Milliman

¹Rockefeller University, New York, New York 10021, USA.

Cell

|March 25, 1999

まとめ

BCL2タンパク質ファミリーは細胞死を調節する. 私たちは,プロアポプトティックなメンバーであるBIDの構造を決定し,細胞死を誘発する活動に不可欠な構造的特徴を明らかにしました.

科学分野:

分子生物学は分子生物学である.
構造生物学構造生物学とは
バイオケミストリーバイオケミストリー

背景:

BCL2タンパク質ファミリーは,プログラム細胞死 (アポプトーシス) を批判的に制御します.
メンバーはアポトーシスのアゴニストまたはアンタゴニストとして機能します.
その構造的基礎を理解することは,細胞死調節の解読の鍵です.

研究の目的:

BCL2ファミリーのプロアポプトティックなメンバーであるBIDの溶液構造を解明する.
BCL2タンパク質の構造上のスーパーファミリーを分析するために.
プロアポプトティック機能の重要な構造的基準を特定する.

主な方法:

BIDのソリューション構造の決定.
BCL2ファミリーメンバーの配列と構造分析.

主要な成果:

BCL2ファミリーのプロアポプトティックなメンバーであるBIDの溶液構造が決定されました.
BCL2ファミリー内の構造的スーパーファミリーが定義されました.
プロアポプトティック機能の2つの重要な基準が特定されました:膜標的とBH3ドメイン曝露です.
BIDのプロアポプトティック活動は,カスパース8分裂によって調節され,その表面特性と局所が変化します.

結論:

BIDの構造的な洞察は,BCL2媒介のアポトーシスを理解するための基礎を提供します.
構造的な類似性は,プロアポプトティック活動を調節する意味を持つスーパーファミリーを定義します.
膜ターゲティングとBH3ドメインの曝露は,BCL2ファミリー内のプロアポプトティック機能にとって重要です.

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