発現した偽遺伝子は,同類のコーディング遺伝子であるメッセンジャーRNAの安定性を調節する
Shinji Hirotsune1, Noriyuki Yoshida, Amy Chen
1Division of Neuroscience, Research Center for Genomic Medicine, Saitama Medical School Yamane 1397-1, Hidaka City, Saitama 350-1241, Japan. shinjih@saitama-med.ac.jp
Nature
|May 2, 2003
まとめ
発現した偽遺伝子は,遺伝子機能を調節することができる. この研究では,偽遺伝子 (Makorin1-p1) がメッセンジャーRNAの安定性を制御し,マウスの発達に影響を与え,非コーディングRNAの役割に関する洞察を提供することを示しています.
科学分野:
- 遺伝学 遺伝学とは
- 分子生物学は分子生物学である.
- 発達生物学 発達生物学について
背景:
- 偽遺伝子は,タンパク質機能が欠けている遺伝子コピーであり,その生物学的な役割はほとんど不明である.
- 人間のゲノムには,推定20,000の擬似遺伝子が含まれており,ゲノムの重要な部分を占めています.
- 擬似遺伝子の機能を理解することは,ゲノムの複雑性と遺伝子調節を理解するために不可欠です.
研究 の 目的:
- 遺伝子発現の調節における発現した擬似遺伝子であるMakorin1-p1の機能的役割を調査する.
- マコリン1-p1がメッセンジャーRNAの安定性を影響するメカニズムを解明する.
- 生物のフェノタイプ,特に多囊性腎臓と骨の変形に対する偽遺伝子規制の影響を決定する.
主な方法:
- 多囊性腎臓と骨の変形を持つトランスゲン挿入マウス変異モデルを使用しました.
- Makorin1-p1偽遺伝子近くのトランスゲン統合が,そのトランスクリプションに与える影響を分析した.
- RNA崩壊要素解析を用いて,変異したMakorin1-p1転写がMakorin1 mRNAの安定性に与える影響を調査した.
- 観察されたフェノタイプにおけるMakorin1およびMakorin1-p1トランスゲンの救済の可能性を評価した.
主要な成果:
- Makorin1-p1の近くのトランスゲンの挿入は,その転写を減少させ,Makorin1のmRNAの不安定化につながった.
- マコリン1の5'領域にある,マコリン1-p1と同型であるcis作用のRNA分解要素が,この効果を媒介した.
- マコリン1とマコリン1-p1の両方のトランスゲンは,多囊性腎臓と骨の変形フェノタイプを救うことができました.
- 遺伝子発現を制御する際に発現したシドゲンの特定の規制作用を示した.
結論:
- 発現した偽遺伝子は,メッセンジャーRNAの安定性を制御するなど,活発な規制的な役割を果たすことができます.
- マコリン1-p1は,シス作用のRNA分解要素を通じて,マコリン1のmRNAの安定性を影響し,偽遺伝子媒介の遺伝子調節を強調する.
- これらの発見は,生物学的プロセスにおける非コーディングRNAとシドゲンの機能的重要性を強調しています.
- 偽遺伝子は,病気に潜在的影響を及ぼす新しい遺伝子調節層を表しています.
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