bZIPのタンパク質とタンパク質の相互作用のネットワークは,数十億年の進化にわたって多様化しました
Aaron W Reinke1, Jiyeon Baek, Orr Ashenberg
1Massachusetts Institute of Technology, Department of Biology, Cambridge, MA 02139, USA.
まとめ
種の多様性は,進化するタンパク質の相互作用から生じる. 基本領域-ルシンジッパー (bZIP) 転写因子ネットワークは,生物分子配列と機能の変化によって引き起こされる単細胞生物と比較して,多細胞生物の複雑性と再配線性が増加しています.
科学分野:
- 分子生物学は分子生物学である.
- 進化生物学の進化生物学について
- ゲノミクスゲノミクスとは
背景:
- 生物分子配列と機能の違いは,外見と行動における種多様性を駆り立てます.
- 基本領域-ルシンのジッパー (bZIP) タンパク質のような転写因子は,遺伝子発現を調節する上で重要な役割を果たし,進化的適応を理解する上で鍵となる.
研究 の 目的:
- メタゾーンや単細胞生物を含む様々な種におけるbZIP転写因子の二分化ネットワークを定量化して比較する.
- bZIPのインタラクトーム内の進化的変化とネットワークの複雑性と,その種の多様性への貢献を調査する.
主な方法:
- bZIP因子の2891のタンパク質ペアの間の二酸化を測定するために,インビトロ相互作用アッセイが行われました.
- bZIP二酸化ネットワークの比較分析は,5つのメタゾーンと2つの単細胞種について行われました.
主要な成果:
- メタゾアンのbZIPネットワークは,単細胞種と比較して,より高い複雑性とヘテロメア相互作用のより大きな割合を示しています.
- メタゾアンのbZIPインタラクトームは構造的に似ているが,最後の共通の祖先以来,接続の重要な再配線が起きており,その結果,種特有のネットワークが形成されています.
- bZIPのオーソログとパラログの微小な配列変異は,相互作用の特異性における実質的な違いにつながる可能性があります.
結論:
- 広範な再配線と変化した相互作用特異性によって特徴づけられるbZIP二酸化ネットワークの進化は,メタゾーン生物の多様性に大きく貢献しています.
- これらの進化するタンパク質の相互作用によって媒介されるシグナル伝達と遺伝子発現における生化学的機能のシフトは,種多様化の根本的な原動力である.
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