Archaeaとバクテリアの間の横行遺伝子転送の証拠は,Thermotoga maritimaのゲノム配列から得られた
K E Nelson1, R A Clayton, S R Gill
1Institute for Genomic Research, Rockville, Maryland 20850, USA.
Nature
|June 9, 1999
まとめ
Thermotoga maritima MSB8のゲノムは,糖分分解の広範な経路と,アーカイアのような遺伝子の高い割合を明らかにしています. 遺伝子クラスタリングは,熱愛性ユーバクテリアとアーカイア間の潜在的な横向遺伝子転送を示唆しています.
科学分野:
- 微生物学 微生物学とは
- ゲノミクスゲノミクスとは
- 進化生物学の進化生物学について
背景:
- Thermotoga maritima MSB8のゲノムは,その代謝能力と進化的関係を理解するために配列化されました.
- 熱好きの生物の遺伝子組成を理解することで,生命が極端な環境への適応について洞察を得ることができます.
研究 の 目的:
- Thermotoga maritima MSB8のゲノムを分析し,古代起源のコーディング領域,代謝経路,遺伝子を特定しました.
- 熱愛性ユーバクテリアとアーカイア間の横行遺伝子転送の証拠を調査する.
主な方法:
- Thermotoga maritima MSB8.8の全ゲノムシーケンシングと分析について
- 比較ゲノミクスは,オートロゴス遺伝子を特定し,他の生物,特にアーカイアとの遺伝子類似性を評価します.
- 遺伝子クラスタリングの分析と遺伝子順序の保存.
主要な成果:
- 1,860,725塩基対のゲノムには1,877の予測されたコーディング領域があり,54%は既知の機能,46%は未知の機能を有する.
- 砂糖と植物ポリサッカリドの分解のための多数の経路を特定しました.
- 熱愛性ユーバクテリアとアルカイアに特有のオートロログを持つ108の遺伝子を発見し,T.maritimaの遺伝子の24%が考古学的な類似性を示しています.
結論:
- Thermotoga maritimaは,重要な考古学的な影響を持つユニークな遺伝子組成を示しています.
- 考古学者のような遺伝子のクラスタリングと保存された遺伝子の順序は,熱愛性のユーバクテリアと考古学者の間の実質的な横行遺伝子転送イベントを示唆しています.
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