自由に拡散するSonic hedgehogの形は,長距離の信号伝達を媒介する
1Department of Molecular Genetics, Biochemistry and Microbiology, University of Cincinnati College of Medicine, 231 Albert Sabin Way, Cincinnati, Ohio 45267, USA.
Nature
|June 8, 2001
まとめ
研究者らは,s-ShhNpと呼ばれる,Sonic hedgehog (Shh) の自由に拡散可能な形態を発見し,開発中の長距離信号伝送に不可欠である. その可用性は経路の抗生物質によって調節され,鶏の四肢にグラデーションを形成します.
科学分野:
- 発達生物学 発達生物学とは
- 分子生物学は分子生物学である.
- 細胞シグナル伝達 細胞信号伝達
背景:
- Sonic hedgehog (Shh) は,胚の発達に不可欠な分泌タンパク質で,短距離と長距離のシグナル伝達を通じてパターンを媒介する.
- 遠距離 Shh シグナリングモデルには,単純な拡散,信号リレー,およびシトネーム媒介輸送が含まれています.
- 以前の証拠は主に溶性ShhNを用いた拡散を支持しており,ネイティブで自由に拡散可能なShh.に関するデータは限られていた.
研究 の 目的:
- ソニック・ヘッジホッグ (Shh) の自由に拡散可能なネイティブ形態の存在と特性を調査する.
- この拡散可能なShh形態の可用性を制御する規制メカニズムを決定する.
- 胚のパターニングにおける自由に拡散するShh形態の生理学的関連性を評価する.
主な方法:
- 新しい,自由に拡散するShh形態 (s-ShhNp) の生化学的特徴.
- s-ShhNpの生物学的効能とマルチメリック状態の評価.
- Shh経路アンタゴニストのパッチド (Ptc) とヘッジホッグ相互作用タンパク質 (Hip) による調節の分析.
- 雛の四肢の発達におけるs-ShhNpグラデーションの検出
主要な成果:
- コレステロール改変型,マルチメリック,および生物学的強力な自由拡散可能なShh (s-ShhNp) の形態の証拠が提示されました.
- s-ShhNpの可用性は,antagonists PtcとHipによって調節されていることが示されています.
- s-ShhNpのグラデーションは,鶏手足の前後軸に沿って観察されました.
結論:
- ソニック・ヘッジホッグ (s-ShhNp) の新しい,自由に拡散し,生物学的に活性な形態が特定されました.
- s-ShhNpの可用性は,Shh経路の主要な抗体によって積極的に調節されます.
- s-ShhNpのグラデーションの存在は,胚のパターニング,特に四肢の発達におけるその生理学的役割を確認しています.
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