関連する実験動画
Updated: Jul 22, 2026

08:01
The Soft Agar Colony Formation Assay
Published on: October 27, 2014
Frzbは,スペーマンのオーガナイザーで発現する分泌タンパク質で,Wnt-8を結合し,抑制する
1Laboratory of Developmental Biology, Food and Drug Administration, Bethesda, Maryland 20892, USA.
Cell
|March 21, 1997
まとめ
Frzbという新しいタンパク質は,Xwnt-8を敵視することによって,Xenopusの胚をドルサライズする. この相互作用は, gastrulation 中の軸のパターンを決定的に重要視し,背中の組織における腹部信号伝達を防止します.
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:
- Frzbは,アミノ端末のFrizzledモチーフを持つ,新たに特定されたタンパク質です.
- Frzbは,Xenopus gastrulationの間にSpemannオーガナイザーで発現しています.
- 固有のFrzbは溶解し,分泌され,細胞境界を越えて作用する.
研究 の 目的:
- Xenopusの胚発達におけるFrzbの役割を調査する.
- FrzbとWntの信号伝達経路の相互作用を決定する.
- 軸のパターニングにおける Frzb の関数を解明する.
主な方法:
- Xenopus Frzb ホモログの分離について.
- Frzbが胚の発達に及ぼす影響を評価するための機能検査.
- Frzb-Wntの相互作用を研究するための共免疫プレシピテーション.
- FrzbのXwnt-8とMyoD誘導に対する対抗性の分析.
主要な成果:
- Xenopus Frzbは胚をドルサライズし,Spemannオーガナイザーで発現した.
- Frzbは,腹部活性化因子Xwnt-8を反作用させ,MyoD誘導を阻害した.
- FrzbはWntタンパク質と直接相互作用し,共免疫プレシピテーションによって確認されました.
- Frzbは,Wnt信号伝達の溶解性アンタゴニストとして機能します.
結論:
- Frzbは, gastrulation 中の Xenopus の軸のパターンに重要な役割を果たしています.
- FrzbはXwnt-8と結合し,無効化させ,背中の組織における腹部信号伝達を防ぐ.
- Frzbの分泌された性質により,細胞の境界を越えて作用し,発達を調節することができます.
関連する概念動画
Canonical Wnt Signaling Pathway
The gene encoding the main signaling molecules of the Wnt signaling pathways (the Wnt proteins) was discovered almost four decades ago by Nüsslein-Volhard and Wieschaus. They identified and originally named the gene "wingless" (wg) after a phenotype discovered during their landmark genetic screen in Drosophila for body pattern defects. At around the same time, another researcher named Harold Varmus found that a murine tumor virus activates the mammalian wg homolog, Int-1, which results in tumor...
Non-Canonical Wnt Signaling Pathways
Wnt is a zygotic effect gene that is expressed during very early embryonic development. It regulates various processes in animals starting from early development through the adult stage, such as organogenesis in the embryo and maintenance of neuronal and blood stem cells. Wnt proteins can induce a wide variety of intracellular pathways depending upon the specific abilities of different Wnt ligands to form a complex with shared and cognate receptors in the presence of different co-receptors. The...
TGF - β Signaling Pathway
The TGF-β signaling pathway regulates cell growth, differentiation, adhesion, motility, and development. TGF-β ligands that induce TGF-β signaling are synthesized in their latent form. Several proteases or cell surface receptors such as integrins act upon the latent form, releasing the active ligand. There are three types of mammalian TGF-βs: (TGF-β1, TGF-β2, and TGF-β3) that bind as homodimers or heterodimers to TGF-β receptors. The TGF-β receptors are of three kinds RI, RII, and RIII. The RI...
Canonical Wnt Signaling Pathway
The gene encoding the main signaling molecules of the Wnt signaling pathways (the Wnt proteins) was discovered almost four decades ago by Nüsslein-Volhard and Wieschaus. They identified and originally named the gene "wingless" (wg) after a phenotype discovered during their landmark genetic screen in Drosophila for body pattern defects. At around the same time, another researcher named Harold Varmus found that a murine tumor virus activates the mammalian wg homolog, Int-1, which results in tumor...
Non-Canonical Wnt Signaling Pathways
Wnt is a zygotic effect gene that is expressed during very early embryonic development. It regulates various processes in animals starting from early development through the adult stage, such as organogenesis in the embryo and maintenance of neuronal and blood stem cells. Wnt proteins can induce a wide variety of intracellular pathways depending upon the specific abilities of different Wnt ligands to form a complex with shared and cognate receptors in the presence of different co-receptors. The...
Role of Ephrin-Eph Signalling in Intestinal Stem Cell Renewal
Erythropoietin-producing hepatocellular carcinoma receptor (Eph) and its ligand, Eph receptor-interacting protein (Ephrin) were first discovered in the human carcinoma cell line, hence the name. Ephrin-Eph interaction guides cells to reach their appropriate location in adult tissues. They also play an essential role in the immune system by helping in immune cell migration, adhesion, and activation. Based on their structure and function, Eph is divided into two classes — EphA and EphB.

