ミトコンドリア遺伝子の配列を核ゲノム内に統合する. 菌類の老化期におけるミトコンドリア遺伝子の配列を核ゲノム内に統合する
Nature
|March 3, 1983
まとめ
Podospora anserinaの細胞老化は,ミトコンドリアDNAの変異を含む. 衰老に関連したDNA (senDNA) プラズミッドは増幅され,ミトコンドリアから核に転送することができます.
科学分野:
- 分子生物学は分子生物学である.
- 遺伝学 遺伝学とは
- 菌類学 菌類学とは
背景:
- Podospora anserinaの細胞老化は,ミトコンドリアDNAの変化と関連しています.
- 離散的なミトコンドリアDNA配列は,老化関連DNA (senDNA) と呼ばれる繰り返しプラズミドとして増幅されます.
- アルファイベントのsenDNAは,一般的な2.6kbpの切除/増幅製品です.
研究 の 目的:
- ポドスポラ・アンサリーナ (Podospora anserina) の急速老化とゆっくり老化する種間の senDNA複製数の違いを調査する.
- 衰老過程中のsenDNAの運命を決定する.
主な方法:
- 異なるP. anserinaの種族におけるsenDNAの比較分析.
- 衰老期における senDNAの局所化の観察.
主要な成果:
- 急速な衰老のP. anserinaの種は,遅い衰老の種と比較して,若いミトコンドリアでアルファイベントのsenDNAのコピー数が高いことを示しています.
- 衰老の間,アルファイベントとベータイベントの両方のsenDNAは,核に転移され,核DNAに統合されます.
- これらのsenDNAプラズミッドは,ミトコンドリアサイトクロームc酸化酵素のサブユニットをコードする.
結論:
- この研究は,ミトコンドリアから核への活性遺伝子要素の動員に関する最初の証拠を提供します.
- P. anserinaの衰老は,ミトコンドリアゲノムの大幅な再編成と臓器間DNA転送を含みます.
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