関連する実験動画
Updated: Jul 7, 2026

09:41
In Vivo Measurement of Hindlimb Dorsiflexor Isometric Torque from Pig
Published on: September 3, 2021
ヘッジホッグは,Cubitus interruptusの異なる転写活性化剤と抑制剤の活動を調節することによって,四肢の発達を制御します
Cell
|April 2, 1999
まとめ
エッジホッグ (Hh) シグナリングは,Cubitus interruptus (Ci) タンパク質を通して,四肢の発達を調節する. Hhは,Ciの抑制体と独特の活性化体の両方を制御し,適切なパターニングのための遺伝子発現に影響を与えます.
科学分野:
- 発達生物学 発達生物学とは
- 分子遺伝学 分子遺伝学
- 細胞シグナリング
背景:
- ヘッジホッグ (Hh) タンパク質は,胚の発達における重要なシグナル伝達分子である.
- Gliの同類体であるCubitus interruptus (Ci) は,Hhの転写応答を媒介する.
- Ciの抑制形態は,Hhシグナル伝達がない場合にタンパク質分解によって生成されます.
研究 の 目的:
- Hhシグナル伝達におけるCiタンパク質の活性に関する規制メカニズムを調査する.
- 手足の発達におけるCI割れ目の役割を決定する.
- Ciの異なる活性化剤および抑制剤の形態の存在と機能を明らかにする.
主な方法:
- 模範生物における四肢発達のインビボ研究.
- Hh信号によって調節される遺伝子発現パターンの分析.
- タンパク質の加工とCIの活動を制御する規制のステップの調査.
主要な成果:
- Ciのタンパク質分解分裂は,四肢のパターン形成に不可欠であり,Hh.によって調節されます.
- 異なるアクティベーター形式のCiが存在し,別々のHh制御ステップによって調節されます.
- 異なるCi形態は,重なり合うが異なるHh標的遺伝子のセットを調節する.
結論:
- 肢体の発達は,Hh信号からの異なる転写出力の統合によって指揮されます.
- Hhシグナリングは,正確な発達制御のために,Ciの抑制体と活性体の両方を利用します.
- Ci規制を理解することは,発達パターンメカニズムについての洞察を提供します.
関連する概念動画
Combinatorial Gene Control
Combinatorial gene control is the synergistic action of several transcriptional factors to regulate the expression of a single gene. The absence of one or more of these factors may lead to a significant difference in the level of gene expression or repression.
The expression of more than 30,000 genes is controlled by approximately 2000-3000 transcription factors. This is possible because a single transcription factor can recognize more than one regulatory sequence. The specificity in gene...
The expression of more than 30,000 genes is controlled by approximately 2000-3000 transcription factors. This is possible because a single transcription factor can recognize more than one regulatory sequence. The specificity in gene...
Master Transcription Regulators
Master transcription regulators are regulatory proteins that are predominantly responsible for regulating the expression of multiple genes. Often these genes work in concert to drive a complex process. Activation of a master transcription regulator can lead to a cascade of transcriptional activation necessary for that outcome. These regulators can directly bind to the regulatory sequences of the various genes involved, or they can indirectly regulate transcription by binding to regulatory...
Hedgehog Signaling Pathway
The Hedgehog gene (Hh) was first discovered due to its control of the growth of disorganized, hair-like bristles phenotype in Drosophila, much like hedgehog spines. Hh plays a crucial role in the development of organs and the maintenance of homeostasis in both invertebrates and vertebrates. However, while Drosophila has only one Hh protein, mammals have multiple functional Hedgehog proteins - Sonic (Shh), Desert (Dhh), and Indian Hedgehog (Ihh). All of these homologous proteins have adapted to...
Somatic to iPS Cell Reprogramming
Reprogramming alters the gene expression in somatic cells, transforming them into induced pluripotent stem (iPS) cells over several generations. Scientists can reprogram cells by introducing genes for four transcription factors—Oct4, Sox2, Klf4, and c-Myc (OSKM) by viral or non-viral methods. These factors are also known as Yamanaka factors after Shinya Yamanaka, who first generated iPS cells using mouse skin cells. Yamanaka was awarded the Nobel Prize in Physiology or Medicine in 2012 for this...

