グローバルメタゲノミクスによる巨大ウイルスの多様性と宿主相互作用
Frederik Schulz1, Simon Roux2, David Paez-Espino2
1DOE Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, CA, USA. fschulz@lbl.gov.
Nature
|January 23, 2020
まとめ
研究者らは,世界的に2,074のニュークレオサイトプラズマの大型DNAウイルス (NCLDV) の新しいゲノムを発見した. これはウイルスの多様性や 生態系における役割の理解を 大きく広げています
科学分野:
- ウイルス学
- ゲノミクス
- エコロジー
背景:
- 核細胞プラズマの大型DNAウイルス (NCLDV) の現在の理解は,共同培養された単離体に大きく依存しています.
- NCLDVの地球規模の多様性と生態学的役割に関する知識は限られている.
研究 の 目的:
- 全世界のメタゲノムデータから多数のNCLDVゲノムを再構築し,分析する.
- NCLDVの既知の遺伝学および機能的多様性を拡大する.
- 巨大ウイルスの世界的分布と生態学的重要性を調査する.
主な方法:
- 公開されているメタゲノムデータを用いて2,074のNCLDVゲノムの再構築.
- 再構築されたゲノムの系統学的および機能的多様性分析.
- メタゲノムデータセットにおける大型の巨大ウイルスからの主要なカプシドタンパク質の分析.
主要な成果:
- NCLDVの遺伝子多様性の11倍と 機能的多様性の10倍の増加
- 巨大ウイルスの世界的分布パターンの特定
- 光合成と基板輸送に関与するウイルス遺伝子の発見は,宿主再プログラム戦略を示唆している.
- ウイルスの系統を様々な真核宿主と結びつける水平遺伝子転送の証拠
結論:
- この研究は,これまで未知の,世界各地のNCLDVの多様性を明らかにした.
- NCLDVは,特に巨大ウイルスは,地球規模の生態系において重要な役割を果たし,多様な真核系と相互作用しています.
- メタゲノミクスアプローチは ウイルスの多様性と機能を明らかにするための強力なツールです
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