付属遺伝子の調整により,V. choleraeの毒性のサイクル型二核酸が生成されます
Bryan W Davies1, Ryan W Bogard, Travis S Young
1Department of Microbiology and Immunobiology, Harvard Medical School, Boston, MA 02115, USA.
Cell
|April 17, 2012
まとめ
ビブリオ第7型パンデミック島-1 (VSP-1) は,新しい小型のRNAとVspR転写因子を介してコレラの病原性を調節する. この経路は,腸の植民と宿主適応に不可欠な周期性二核酸を生成します.
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
- 分子生物学は分子生物学である.
背景:
- コレラ病原性におけるビブリオ第7型パンデミック島-1 (VSP-1) の役割は,以前は知られていなかった.
- ウイルス性因子の調節を理解することは,Vibrio cholerae感染と闘うための鍵です.
研究 の 目的:
- コレラ病原性におけるVSP-1の機能を明らかにする.
- VSP-1と他の毒性の要因を結びつける規制経路を特定する.
主な方法:
- ToxT regulon.をマッピングするためにクロマチン免疫プレシピテーションシーケンシング (ChIP-seq)
- RNAの配列を解析して,小さなRNAの調節体を特定する.
- 遺伝子発現分析とV. cholerae.における機能分析
主要な成果:
- TCP島からの小さなRNAは,VSP-1-エンコードされたVspR.を低調化する.
- VspRは,新しいディヌクレオチドサイクラゼ (DncV) を含む遺伝子を調節する.
- DncVは,コロニー化と化学毒性の調節に不可欠なハイブリッドサイクリックAMP-GMP分子を合成します.
結論:
- VSP-1はV. choleraeの病原性の島であり,宿主の適応に不可欠である.
- この経路は,異なったゲノム諸島を結びつけ,新しい規制メカニズムを明らかにします.
- DncV媒介の循環型二核酸生成は,V. choleraeの毒性にとって不可欠である.
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