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In Vivo Modeling of the Morbid Human Genome using Danio rerio
Published on: August 24, 2013
在IHH中引起数字异常的突变会改变其信号容量和范围
Bo Gao1, Jianxin Hu, Sigmar Stricker
1Department of Biochemistry, the University of Hong Kong, Hong Kong, China.
Nature
|March 3, 2009
概括
甲状腺骨类型A1 (BDA1),是一种影响手指和脚骨的遗传疾病,是由印度刺 (IHH) 基因的突变引起的. 一种特定的IHH突变损害了信号传输,导致小鼠的发育异常,反映了人类BDA1.1.
科学领域:
- 发育生物学 发展生物学
- 遗传学 是一个遗传学.
- 分子生物学分子生物学
背景情况:
- 甲状腺动症类型A1 (BDA1) 是一种自体主导的人类遗传疾病,其特征是中的缩短或缺失.
- BDA1与印度刺 (IHH) 基因中的异构合错误突变有关,该基因编码了一个关键的发育形态原体.
研究的目的:
- 研究印度刺 (IHH) 中特定的BDA1相关突变 (E95K) 如何影响其与关键调节蛋白的相互作用.
- 用小鼠模型分析E95K突变对IHH信号强度和范围的影响.
主要方法:
- 研究了突变的印度刺 (IHH) 蛋白 (E95K) 与其受体PTCH1和对手HIP1.1的相互作用.
- 开发并分析了一种携带IHH基因E95K突变的小鼠模型.
主要成果:
- 印度刺 (IHH) 中的E95K突变损害了它与PTCH1和HIP1的相互作用,这与突变在关键结合部位聚集一致.
- 鼠标模型表现出改变的印度刺 (IHH) 信号强度和范围.
- 携带E95K突变的小鼠表现出类似于人类甲状腺突变类型A1.1的数字异常.
结论:
- 印度刺 (IHH) 中的A1型 (BDA1) 突变E95K突变破坏了重要的蛋白质相互作用,改变了信号通路.
- 这项研究提供了BDA1的分子机制,并验证了用于研究这种人类遗传疾病的小鼠模型.
相关概念视频
Mutations
Overview
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...
Abnormal Proliferation
Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the daughter...
Mutations
Mutations are changes in the sequence of DNA. These changes can occur spontaneously or they can be induced by exposure to environmental factors. Mutations can be characterized in a number of different ways: whether and how they alter the amino acid sequence of the protein, whether they occur over a small or large area of DNA, and whether they occur in somatic cells or germline cells.
Chromosomal Alterations Are Large-Scale Mutations
While point mutations are changes in a single nucleotide in...
Chromosomal Alterations Are Large-Scale Mutations
While point mutations are changes in a single nucleotide in...
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...

