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ナノグ,Pou5f1,SoxB1は,母体から子体への移行中にジゴティック遺伝子発現を活性化します
Miler T Lee1, Ashley R Bonneau, Carter M Takacs
11] Department of Genetics, Yale University School of Medicine, New Haven, Connecticut 06510, USA [2].
Nature
|September 24, 2013
まとめ
母性ナノグ,Pou5f1 (Oct4),SoxB1の転写因子は,ゼブラフィッシュのジゴティックゲノム活性化 (ZGA) を開始する. 欠乏すると,発育が停止し,母から子宮への移行 (MZT) に不可欠なmiR-430を含む重要な遺伝子の活性化が妨げられます.
科学分野:
- 発達生物学 発達生物学について
- 遺伝学 遺伝学とは
- 分子生物学は分子生物学である.
背景:
- 母性の要因は,早期発育を誘導し,母性から子性への移行 (MZT) 中のジゴティックゲノム活性化 (ZGA) を引き起こす.
- ゼブラフィッシュのZGAは,ガストルーレーションと母性mRNAクリアランスに不可欠であり,ミクロRNAmiR-430によって部分的に媒介されます.
- 脊椎動物におけるジゴティックプログラムを開始する特定の要因は未特定のままである.
研究 の 目的:
- ゼブラフィッシュにおけるジゴティック遺伝子の活性化を開始する鍵となる転写因子を特定する.
- 妊産婦から胎児への移行と,その後の発達におけるこれらの要因の役割を解明する.
主な方法:
- トランスクリプトミア分析を用いた母性活性化遺伝子の特定.
- MZT以前の転写因子の翻訳状態を決定するためのリボソームプロファイリング.
- 遺伝子操作 (機能の喪失) により,ZGAと発達の必要性を評価する.
主要な成果:
- ナノグ,Pou5f1 (Oct4),SoxB1はゼブラフィッシュにおけるZGAの重要なレギュレータとして特定されました.
- これらの要因は,MZT以前の最も高度に翻訳された転写因子の一つです.
- ナノグ,プー5f1,ソックスB1の結合喪失は,胃化の前の発達停止と,miR-430を含む,ジゴティック遺伝子の75%以上の活性化障害を引き起こした.
結論:
- 母性ナノグ,Pou5f1,およびSoxB1は,ゼブラフィッシュのジゴティック発達プログラムを開始するために不可欠です.
- これらの要因は,miR-430発現を活性化することによって,母子のプログラムのクリアランスを誘導し,それによってMZTを容易にします.
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Gene expression can be regulated at almost every step from gene to protein. Transcription is the step that is most commonly regulated. This involves the binding of proteins to short regulatory sequences on the DNA. This association can either promote or inhibit the transcription of a gene associated with the respective sequence.
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