SRPK1-Catalyzed Protamine Phosphorylationのスプライシングキナーゼによる受精卵細胞における親子のゲノム再プログラミングの開始
Lan-Tao Gou1, Do-Hwan Lim1, Wubin Ma2
1Department of Cellular and Molecular Medicine, Institute of Genomic Medicine, University of California, San Diego, La Jolla, CA 92093, USA.
Cell
|March 15, 2020
まとめ
スプライシングキナーゼSRPK1は,プロタミンをリン酸化することによって受精後にプロタミンとヒストンの交換を開始する. このリン酸化は 発達初期に親のゲノム再プログラムとクロマチンの再編成に不可欠です
科学分野:
- 生殖生物学
- 分子生物学
- エピジェネティクス
背景:
- 精子の圧縮は,プロタミンがヒストンを置き換えるもので,ゲノム再プログラムのために受精時に逆転する必要があります.
- この重要なプロタミンとヒストンの交換を開始し,制御する正確な分子機構は,ほとんど不明のままである.
研究 の 目的:
- 受精卵細胞におけるプロタミンとヒストンの交換を開始する重要な分子プレーヤーとメカニズムを特定する.
- この基本的な生命の初期におけるスプライシングキナーゼSRPK1の役割を解明する.
主な方法:
- 場所固有のリン酸化測定法
- プロタミンの凝縮とDNA依存の相変異の分析
- 核プラズミン (NPM2) とHIRA募集研究
- 精子,卵細胞,および初期前核における全ゲノムATAC-seq分析
主要な成果:
- スプライシングキナーゼSRPK1は,サイト固有のプロタミンリン酸化を触媒化し,プロタミンとヒストンの交換を開始する.
- SRPK1媒介のリン酸化は,NPM2によるプロタミンの放出と,H3.3の堆積のためにHIRAの徴募を容易にする.
- SRPK1によるプロタミンリン酸化は,前核形成の間に両方の親遺伝子の選択的なクロマチンのアクセシビリティの消去につながります.
結論:
- SRPK1はプロタミンとヒストンの交換の重要なイニシアターであり,精子の解密とゲノム再プログラムに不可欠です.
- SRPK1によるプロタミンリン酸化は,受精後の父と母の両方のゲノムで同期されたクロマチンの再編成プログラムをオーケストラします.
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