マルチプルスルファターゼ欠乏症で欠陥のある,スルファターゼにおける新しいアミノ酸改変です
B Schmidt1, T Selmer, A Ingendoh
1Universität Göttingen, Federal Republic of Germany.
Cell
|July 28, 1995
まとめ
マルチプルスルファターゼ欠乏症 (MSD) は,まれな遺伝疾患である. システインを2アミノ3オキシプロピオン酸に変換する重要なタンパク質の改変は,硫酸酶活性に不可欠であり,その欠乏はMSDを引き起こす.
科学分野:
- バイオケミストリー バイオケミストリー
- 遺伝学 遺伝学とは
- 分子生物学は分子生物学である.
背景:
- マルチプルスルファターゼ欠乏症 (MSD) は,リソソムの貯蔵障害である.
- MSDは,既知のすべてのスルファタゼの活性が低下していることが特徴です.
- MSDにおけるスルファターゼ不活性性の根本的な原因は,以前は知られていませんでした.
研究 の 目的:
- MSDにおけるスルファタゼの活性低下の分子基盤を調査する.
- 硫酸塩酵素の触媒機能に必要な共通の共同またはポストトランスレーション的改変を特定する.
主な方法:
- 活性スルファタゼの構造分析.
- 健康な個人とMSD患者のスルファテーゼ構造の比較.
- サルファタゼにおけるシステイン残留物の改変の分析.
主要な成果:
- 活性スルファターゼは,システイン残基が2 - アミノ - 3 - オックスプロピオニウム酸に変換されている.
- MSD細胞からのスルファタゼは,未修正のシステイン残基を保持します.
- この変換は,硫酸塩基間の保存された修正である.
結論:
- システインを2アミノ3オキシプロピオン酸に変換することは,硫酸塩酵素の触媒活性に不可欠です.
- この特定のタンパク質変異の欠乏は,マルチプルスルファターゼ欠乏症の原因である.
- この発見は,MSDの病原性に対する分子的な説明を提供します.
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