エッジホッグのタンパク質バイオゲネシスのオートプロテオリシス
J J Lee1, S C Ekker, D P von Kessler
1Howard Hughes Medical Institute, Department of Molecular Biology and Genetics, Johns Hopkins School of Medicine, Baltimore, MD 21205.
Science (New York, N.Y.)
|December 2, 1994
まとめ
ヘッジホッグ (hh) 遺伝子は,胚の発達に不可欠な自己タンパク質分裂によって2つのタンパク質を形成します. 分裂の障害は,HHタンパク質のシグナル伝達とパターニングに影響し,胚の発達に影響します.
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.
- 遺伝学 遺伝学とは
背景:
- ヘッジホッグ (hh) 遺伝子ファミリーは,様々な生物における胚のパターン形成に不可欠な細胞外信号伝達タンパク質をコードする.
- HHタンパク質の処理の分子メカニズムを理解することは,発達におけるその役割を解読する鍵です.
研究 の 目的:
- ドロソフィラ hh 遺伝子産物の処理を調査する.
- 異なるHHタンパク質種の機能的意義を in vivoで決定する.
主な方法:
- タンパク質加工の分析は,インビトロ自己プロテオリシスアッセイによって行われます.
- ミュータント分析を用いた in vivo 前駆体割れ方の評価.
- HHタンパク質の変異体のシグナル伝達とパターニング活動の評価.
主要な成果:
- ドロソフィラhh遺伝子は,より大きな前駆体からの内部オートプロテオリスティック割れによって2つの主要なタンパク質種を生成します.
- オートプロテオリシスの効率を低下させる変異は,in vivo前駆体割れに障害がある.
- 分裂の障害は,HHタンパク質の信号伝達とパターニング活動の低下と相関する.
- 2つのHHタンパク質種は,異なる生化学的性質と組織分布を示した.
結論:
- オートプロテオリスティック分裂は,機能的なHHタンパク質種を生成するために不可欠です.
- HHタンパク質の形態の独特の生化学的性質と組織分布は,長距離と短距離のシグナル伝達を説明する可能性がある.
- この処理メカニズムは,ヘッジホッグのシグナル伝達経路によって媒介される適切な胚のパターン形成に不可欠です.
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Within a biological system, the DNA encodes the RNA, and the nucleotide sequence in the RNA further defines the amino acid sequence in the protein. This is referred to as “The Central Dogma of Molecular Biology” - a term coined by Francis Crick. Central dogma is a firm principle in biology that defines the flow of genetic information within any life form. The two fundamental steps in central dogma are - transcription and translation.
Transcription is the synthesis of RNA molecules by RNA...
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