鲁米是一种CAP10域糖系转移酶,它修改了Notch,并且对于Notch信号传输是必需的
Melih Acar1, Hamed Jafar-Nejad, Hideyuki Takeuchi
1Program in Developmental Biology, Baylor College of Medicine, Houston, TX 77030, USA.
Cell
|February 5, 2008
概括
鲁米是一种调节细胞命运的基因,充当O-葡萄糖转移酶. 它通过O-glucosylating Notch修改了内质网膜中的Notch信号,影响了蛋白质折叠和细胞膜信号.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 痕信号对于细胞命运决定至关重要.
- 了解Notch信号的调节对于发育生物学和疾病研究至关重要.
研究的目的:
- 为了识别和描述Notch信号的新型调节者.
- 阐明已识别的基因rumi影响Notch信号传递的分子机制.
主要方法:
- 利用对温度敏感的突变性屏幕来识别影响Notch信号的基因.
- 进行了体内分析,以确定鲁米的目标和功能.
- 生物化学分析来描述鲁米的酶活性.
主要成果:
- 鉴定出"rumi"是一种具有温度敏感的Notch信号表型的基因.
- 鲁米作为一种蛋白质O-葡萄糖酶转移酶,特别是O-葡萄糖化.
- 鲁米通过O-glucosylating Notch在内分泌网膜中促进了正确的Notch折叠和贩运.
结论:
- 鲁米对于正确的Notch信号传递至关重要,它通过调节Notch蛋白质的成熟.
- 在细胞内膜网膜中O-糖化Notch by Rumi是其细胞膜信号功能的一个关键步骤.
相关概念视频
Riboswitches
Riboswitches are non-coding mRNA domains that regulate the transcription and translation of downstream genes without the help of proteins. Riboswitches bind directly to a metabolite and can form unique stem-loop or hairpin structures in response to the amount of the metabolite present. They have two distinct regions – a metabolite-binding aptamer and an expression platform.
The aptamer has high specificity for a particular metabolite which allows riboswitches to specifically regulate...
The aptamer has high specificity for a particular metabolite which allows riboswitches to specifically regulate...
Notch Signaling Pathway
The Notch signaling pathway is a major intracellular signaling pathway that is highly conserved over a broad spectrum of metazoan species. It stands unique from other intracellular signaling mechanisms in animals because notch protein itself acts as the receptor as well as the primary signaling molecule.
The Notch gene came into the limelight in 1914 after the discovery that its mutation in Drosophila melanogaster leads to a serrated (or "notched") wing margin phenotype. It was not until 1985...
The Notch gene came into the limelight in 1914 after the discovery that its mutation in Drosophila melanogaster leads to a serrated (or "notched") wing margin phenotype. It was not until 1985...
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...
Calmodulin-dependent Signaling
Calmodulin (CaM) is a calcium-binding protein in eukaryotes that controls various calcium-regulated cellular processes. It has four calcium-binding sites that bind calcium to form the calcium-calmodulin ( Ca2+-CaM) complex. GPCR stimulation increases the calcium levels in the cells that bind to CaM and induces a conformational change.
The Ca2+-CaM complex does not have enzymatic activity by itself. Instead, the complex binds downstream target proteins, including membrane proteins or enzymes,...
The Ca2+-CaM complex does not have enzymatic activity by itself. Instead, the complex binds downstream target proteins, including membrane proteins or enzymes,...
Notch Signaling Pathway
The Notch signaling pathway is a major intracellular signaling pathway that is highly conserved over a broad spectrum of metazoan species. It stands unique from other intracellular signaling mechanisms in animals because notch protein itself acts as the receptor as well as the primary signaling molecule.
The Notch gene came into the limelight in 1914 after the discovery that its mutation in Drosophila melanogaster leads to a serrated (or "notched") wing margin phenotype. It was not until 1985...
The Notch gene came into the limelight in 1914 after the discovery that its mutation in Drosophila melanogaster leads to a serrated (or "notched") wing margin phenotype. It was not until 1985...
Role Of Notch Signalling In Intestinal Stem Cell Renewal
Notch signaling was first discovered in Drosophila melanogaster, where it is involved in cell lineage differentiation. Notch signaling regulates the maintenance and differentiation of intestinal stem cells or ISCs by controlling the expression of atonal homolog 1 or Atoh1. Atoh1 directs cells to differentiate into secretory cells.
Direct cell-to-cell contact is needed for the activation of Notch signaling. The signal is initiated when a notch ligand binds to a receptor on an adjacent cell, also...
Direct cell-to-cell contact is needed for the activation of Notch signaling. The signal is initiated when a notch ligand binds to a receptor on an adjacent cell, also...


