arrAはAs(V) 呼吸の信頼性の高いマーカーです

D Malasarn¹, C W Saltikov, K M Campbell

¹Division of Biology, California Institute of Technology, Pasadena, CA 91125, USA.

Science (New York, N.Y.)

|October 16, 2004

まとめ

酸塩を吸い込むバクテリアは,水中の酸塩の汚染に影響を与えます. arrA遺伝子は,このプロセスに不可欠であり,汚染された環境における細菌の活動を監視することができます.

科学分野:

環境微生物学環境微生物学
地質化学地質化学
分子生物学は分子生物学である.

背景:

酸塩を吸い込む細菌は,酸塩の種化と移動性に影響を与えます.
飲料水のアルゼンチンの汚染は,人間の健康にリスクをもたらします.

研究の目的:

酸塩呼吸におけるarrA遺伝子の役割を調査する.
アラ (arrA) が,アス (V) 呼吸する細菌の検出とモニタリングに使用できるかどうかを判断する.

主な方法:

分子遺伝学の技術が採用されました.
arrA遺伝子の保存と機能を研究した.
汚染された堆積物でarrA発現を分析した.

主要な成果:

このarrA遺伝子は,As(V) 呼吸するバクテリアの間で高度に保存されています.
arrAは,アルセネートをアルセニットに還元するのに不可欠であり,特に鉄鉱物に吸収された場合です.
arrAの存在と発現は,鉄に富み,ヒ素に汚染された堆積物中の活性なAs (V) 呼吸細菌を示している.

結論:

arrA遺伝子は,As(V) 呼吸するバクテリアの識別とモニタリングのための信頼性の高いマーカーです.
arrA発現のモニタリングは,汚染された場所でのアルセンの地化学制御におけるこれらの細菌の役割を評価するのに役立ちます.

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