PSD95(DLG-4遺伝子)におけるTri-PDZドメインの進化
Riya Nilkant1, Lisa Y Mesrop2, Samuel Lobo3
1Department of Molecular, Cell and Developmental Biology, University of California Santa Barbara, Santa Barbara, CA 93106, USA.
Molecular biology and evolution
|December 17, 2025
まとめ
シナプスタンパク質PSD-95をコードするDLG4遺伝子は、Filozoaに起源を持ちます。そのPDZドメインは単一の祖先ドメインから進化し、水素結合はPDZ3リガンド相互作用に不可欠です。
科学分野:
- 進化生物学
- 分子生物学
- ゲノミクス
背景:
- シナプスタンパク質(DLG4(PSD-95をコード)など)は、動物の生命に先行する古代の起源を持っています。
- DLG4は、PDZドメインを含む保存されたドメイン構造を持つMAGUKタンパク質です。
研究 の 目的:
- DLG4のtri-PDZドメインの進化の歴史を、その深い祖先の起源までたどること。
- PDZ3ドメインとそのリガンドCRIPTの保存された結合メカニズムを調査すること。
主な方法:
- DLG4のtri-PDZドメインの系統解析。
- ドメイン保存のための進化スケールモデリング(ESM2)。
- 構造および結合解析のためのAlphaFold2マルチマー。
主要な成果:
- DLG4のPDZドメインの系統は、Filozoaにおける単一の祖先ドメインに由来します。
- PDZドメインの同一性は、動物界の境界を越えて保存されています。
- PDZ3リガンドであるCRIPTはFilozoaで保存されており、水素結合が保存された結合の鍵となります。
結論:
- DLG4のPDZドメインアーキテクチャは古代のものであり、高度に保存されています。
- 水素結合は、PDZ3リガンド相互作用のための基本的なイノベーションを表し、より広範なタンパク質間相互作用を可能にします。
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