豊富なSAR11ウイルスは海洋に存在します
Yanlin Zhao1, Ben Temperton, J Cameron Thrash
1Department of Microbiology, Oregon State University, Corvallis, Oregon 97331, USA.
Nature
|February 15, 2013
まとめ
研究者らは,SAR11細菌に感染するウイルスであるペラギファージを発見し,SAR11免疫に関する理論を否定した. この発見は,SAR11を示唆しています.
科学分野:
- マリン・マイクロバイオロジー
- ウイルス学 ウイルス学 ウイルス学
- 海洋学 海洋学 海洋学
背景:
- SAR11バクテリア群は海洋生態系を支配しており,その成功は以前はファグ耐性や効率的な代謝に起因していた.
- ウイルスのトップダウン捕食は,SAR11の集団動態のマイナーな要因と考えられました.
研究 の 目的:
- SAR11バクテリアに対するウイルス捕食の役割を調査する.
- SAR11バクテリアに感染するウイルスを分離し,特徴づけます.
主な方法:
- 培養物のSAR11感染ウイルスの分離.
- 孤立したウイルスのゲノム解析.
- 海洋ウイルスメタゲノムデータの分析.
主要な成果:
- 2つのウイルスファミリーからペラギファージと呼ばれる多様なSAR11ウイルスの分離.
- ペラギファージゲノムは,海洋ウイルスメタゲノムに豊富に含まれています.
- 新しい,非常に豊富なポドウイルスサブファミリー (HTVC010P) が特定され,SAR11.0に重大なウイルスの捕食性を示しました.
結論:
- SAR11バクテリアはウイルスの捕食に敏感であり,以前の仮説に異議を唱える.
- SAR11の生態学的成功は,ウイルスの免疫ではなく,資源競争における適応によるものである可能性が高い.
- ペラジファージは,海洋微生物の生態系と生地化学の循環において重要な役割を果たします.
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