ココリトウイルス (Coccolithovirus) の完全なゲノム配列とリティック相転写プロファイル
William H Wilson1, Declan C Schroeder, Michael J Allen
1Plymouth Marine Laboratory, Prospect Place, The Hoe, Plymouth, PL1 3DH, UK. whw@pml.ac.uk
Science (New York, N.Y.)
|August 16, 2005
まとめ
海藻Emiliania huxleyiに感染するココリトウイルスには,セラミド生物合成とウイルス転写のためのユニークな遺伝子があります. ほとんどのウイルスの遺伝子は,感染中に発現し,新しいウイルスの生物学を明らかにします.
科学分野:
- 海洋ウイルス学 海洋ウイルス学
- 微生物ゲノミクス
- アルガル生物学 アルガル生物学
背景:
- Coccolithovirus属は,世界的に重要な海洋微藻であるEmiliania huxleyiに感染するウイルスを含む.
- E. huxleyiは,海洋生態系と世界の炭素循環において重要な役割を果たしています.
研究 の 目的:
- ココリトウイルス (Coccolithovirus) のゲノム含有量と遺伝子発現をリチ菌感染中に調査する.
- ココリトウイルスゲノム内の新しい遺伝子と生物学的機能を特定する.
主な方法:
- ココリトウイルス (Coccolithovirus) の遺伝子解析.
- 感染したE. huxleyi. のマイクロアレイトランスクリプトミックの分析.
主要な成果:
- ココリトウイルスゲノムには,セラミド生物合成 (スフィンゴリピドがアポトーシスを誘発する) と6つのRNAポリメラーゼサブユニットを含む予期せぬ遺伝子が含まれています.
- 新しいプロモーターは,ウイルスが自身の転写機構をコードすることを示唆しています.
- マイクロアレイ分析により,予測されたウイルス遺伝子の65%がリチ菌感染中に発現することが示されました.
結論:
- ココリトウイルスは,宿主細胞のアポトーシスとウイルスの転写に影響を及ぼすユニークな遺伝子組成を持っています.
- ウイルスは感染中にそのゲノムの重要な部分を積極的に表現し,複雑なウイルス-宿主相互作用を強調します.
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