稀土元素に対するピコモラアフィニティを持つ選択的,タンパク質ベースの光センサー
Joseph A Mattocks1, Jackson V Ho1, Joseph A Cotruvo1
1Department of Chemistry , The Pennsylvania State University , University Park , Pennsylvania 16802 , United States.
Journal of the American Chemical Society
|February 7, 2019
まとめ
新しい光センサーである LaMP1 は 高い感度で 稀土元素 (ランタニド) を検出します このツールは バクテリアがこれらの重要な金属を 運ぶ方法と 周囲の環境での検出を 助ける方法を示しています
科学分野:
- 生物化学
- 環境科学
- 微生物学
背景:
- 稀土元素の検出は採掘とリサイクルに不可欠です.
- ランタニド (Ln) 検出の既存の方法は,感度と速度が欠けている.
- Lnの生物学的な役割を理解するには,敏感な検出ツールが必要です.
研究 の 目的:
- 選択的なLn検出のための遺伝的にコードされた光センサーを開発する.
- メチロバクテリア エクストルクエンスの細胞内輸送を調査する
- バクテリアの潜在的Ln吸収システムを調査する.
主な方法:
- ランモジュリンに基づくランタニド固有の光センサー (LaMP1) の設計.
- 様々な金属イオンに対する LaMP1 の反応を特徴づける.
- メチロバクテリア エクストルクエンスの Ln 輸送を研究するために LaMP1 を利用した.
主要な成果:
- LaMP1は,すべてのLn (III) イオンに対して高い選択性と感受性を表している (表面的なKdsは10−50 pM).
- 初期のLns (La(III) - Nd(III)) をM.extorquensの細胞内への選択的輸送が実証されている.
- 分泌されるケラターを含む新しいLn (III) 吸収システムの証拠を提供した.
結論:
- LaMP1は,敏感で選択的なREE検出のための強力なツールです.
- バクテリアの細胞内輸送メカニズムを 発見しました
- LaMP1は環境と産業の応用において REEの分析を進めることができます.
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