su (wa) とtra (tra) のアルギニン/セリンに富んだドメインのRNA処理レギュレータは,スプライシングに関与する亜核区間のタンパク質を標的とする
1Department of Biochemistry and Cell Biology, State University of New York, Stony Brook 11794.
Cell
|October 18, 1991
まとめ
su (wa) やtraのようなスプライシングレギュレータにおけるアルギニン/セリンに富んだ (RS) ドメインは,機能に不可欠である. これらのRSドメインは,標的となる信号として働き,タンパク質を,プレ-mRNAスプライシングに関与する特定の亜核区画に誘導する.
科学分野:
- 分子生物学は分子生物学である.
- 遺伝学 遺伝学とは
- 細胞生物学 細胞生物学
背景:
- プレ-mRNAスプライシングは,遺伝子発現における重要なプロセスです.
- 白いアプリコスの抑制器 (su(wa)) と変圧器 (tra)) のようなスプライシングの調節器は,重要な役割を果たします.
- これらの調節体は,アーギニン/セリン (RS) に富んだドメインである保存された構造モチーフを共有しています.
研究 の 目的:
- su (wa) と tra.におけるRSドメインの機能的重要性を調査する.
- RSドメインが核内で特定のターゲティング能力を持っているかどうかを判断する.
- 接合因子の亜核の局所化におけるRSドメインの役割を調査する.
主な方法:
- su(wa) RSドメインの削除分析.
- su ((wa) と tra RS ドメイン間のドメイン交換実験.
- レポータータンパク質とRSドメインとの融合タンパク質構造.
- コンフォカル顕微鏡を用いた免疫細胞化学的局所化研究.
主要な成果:
- su(wa) RSドメインの削除により,スプライシングの規制機能が廃止されました.
- su(wa) RSドメインを tra RSドメインに置き換えると,機能がほぼ回復しました.
- 単純な核の入力信号が部分的に救助された機能であり,核の輸入を超えた一般的な役割を果たしていることを示しています.
- 両方のRSドメインは,特に融合したレポータータンパク質を,点のある亜核区画に標的とした.
結論:
- アルギニン/セリン (RS) に富んだドメインは,スプレイスングレギュレータの機能に不可欠である.
- RSドメインは,特定のターゲティング信号として作用し,スプライシングに不可欠な亜核区画にタンパク質を集中させます.
- これは,RSドメインを,スプライシング代謝に関与する新しい核局所化信号のクラスとして識別する.
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