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Updated: Jul 20, 2026

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In Vitro Generation of Somite Derivatives from Human Induced Pluripotent Stem Cells
Published on: April 25, 2019
7less遺伝子の産物である息子: Ras Rasの推定活性化剤
L Bonfini1, C A Karlovich, C Dasgupta
1Department of Biology, University of California, Los Angeles 90024.
まとめ
セブンレス (Sos) 遺伝子の息子は果物ハエの発達に不可欠です. そのタンパク質製品はRasを活性化させ,Ras経路がDrosophilaのニューロンの発達に不可欠であることを示唆しています.
科学分野:
- 分子生物学は分子生物学である.
- 発達生物学 発達生物学とは
- 遺伝学 遺伝学とは
背景:
- Son of sevenless (Sos) 遺伝子は,信号伝達経路に関与しています.
- これらの経路は,セブンレスおよび表皮成長因子受容体チロシンキナーゼによって開始されます.
研究 の 目的:
- セブンレス (Sos) 遺伝子の息子を隔離し,配列化する.
- Sos遺伝子産物の機能を理解するために.
主な方法:
- 遺伝子分離と配列決定.
- タンパク質分析. タンパク質分析.
主要な成果:
- Sos遺伝子は成功裏に分離され,配列が決定されました.
- その製品は1595アミノ酸のタンパク質である.
- Sosタンパク質は,グアニンヌクレオチド交換因子であるSaccharomyces cerevisiae CDC25に類似しています.
結論:
- Sosタンパク質は Rasを活性化する.
- ras経路は,ドロソフィラのニューロン発育に作用する.
関連する概念動画
The Ras Gene
The Ras-gene-encoded proteins are regulators of signaling pathways controlling cell proliferation, differentiation, or cell survival. The Ras-gene family in humans constitutes three primary members—the HRas, NRas, and KRas. These genes code for four functionally distinct yet closely related proteins—the HRas, NRas, KRas4A, and KRas4B. The involvement of mutant Ras genes in human cancer was first discovered in 1982 and is among the most common causes of human tumorigenesis.
Ras is a superfamily...
Ras is a superfamily...
The Retinoblastoma Gene
Tumor suppressor genes are normal genes that can slow down cell division, repair DNA mistakes, or program the cells for apoptosis in case of irreparable damage. Hence, they play an essential role in preventing the proliferation of damaged cells.
The first-ever tumor suppressor gene called Rb was identified in retinoblastoma - a rare eye tumor in children. In inherited forms of the disease, a child inherits one defective copy of the Rb gene, which predisposes them to retinoblastoma. However,...
The first-ever tumor suppressor gene called Rb was identified in retinoblastoma - a rare eye tumor in children. In inherited forms of the disease, a child inherits one defective copy of the Rb gene, which predisposes them to retinoblastoma. However,...
Small GTPases - Ras and Rho
Ras and Rho are small monomeric GTPases that act downstream of receptor tyrosine kinase (RTK) and regulate various cellular processes. These GTPases switch between active and inactive states by binding to guanine nucleotides.
Three regulatory proteins control their activity:
Three regulatory proteins control their activity:
MAPK Signaling Cascades
Mitogen-activated protein kinase, or MAPK pathway, activates three sequential kinases to regulate cellular responses such as proliferation, differentiation, survival, and apoptosis. The canonical MAPK pathway starts with a mitogen or growth factor binding to an RTK. The activated RTKs stimulate Ras, which recruits Raf or MAP3 Kinase (MAPKKK), the first kinase of the MAPK signaling cascade. Raf further phosphorylates and activates MEK or MAP2 Kinases (MAPKK), which in turn phosphorylates MAP...
The Ras Gene
The Ras-gene-encoded proteins are regulators of signaling pathways controlling cell proliferation, differentiation, or cell survival. The Ras-gene family in humans constitutes three primary members—the HRas, NRas, and KRas. These genes code for four functionally distinct yet closely related proteins—the HRas, NRas, KRas4A, and KRas4B. The involvement of mutant Ras genes in human cancer was first discovered in 1982 and is among the most common causes of human tumorigenesis.
Ras is a superfamily...
Ras is a superfamily...

