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相关概念视频

Lethal Alleles02:41

Lethal Alleles

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Agouti: A Lethal Allele
Lucien Cuénot discovered lethal alleles in 1905 while studying the inheritance of coat color in mice. The agouti gene is responsible for the color of the coat in mice. This gene codes for an agouti-signaling protein, which is responsible for melanin distribution in mammals. The wild-type allele gives rise to gray-brown coat color in mice, while the mutant allele gives rise to yellow coat color. In addition to coat color, the agouti gene is associated with the yellow...
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Immunodeficiency Diseases01:25

Immunodeficiency Diseases

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Immunodeficiency disorders are conditions in which the immune system's ability to fight infectious disease and cancer is compromised or entirely absent. The immune system comprises a complex network of cells, tissues, and organs that work together to protect the body from potentially harmful invaders. When this system is deficient or not functioning properly, it leaves the body susceptible to infections, diseases, or other complications.
There are three main causes of immunodeficiency...
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Translation01:31

Translation

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Lesson: Translation
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of...
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Translation01:31

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Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
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Proteins are...
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相关实验视频

Updated: Feb 28, 2026

In Vivo Modeling of the Morbid Human Genome using Danio rerio
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新型双性LIG3突变导致具有免疫缺陷的致命表型.

Gonench Kilich1, Tanaya Jadhav2, Kelly Maurer1

  • 1Division of Allergy Immunology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA.

American journal of medical genetics. Part A
|February 25, 2026
PubMed
概括

研究人员在一个患有严重神经和发育问题的儿童中发现了新的LIG3基因变异. 这一发现扩大了已知的LIG3缺陷表型,包括免疫和内分泌问题.

关键词:
在 LIG3 基因上.基因组重新分析免疫缺陷是一种免疫缺陷.线粒体疾病是线粒体疾病.

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科学领域:

  • 遗传学 遗传学 是一个
  • 分子生物学分子生物学
  • 神经学 神经学

背景情况:

  • LIG3中的致病性双变体会导致线粒体DNA枯竭综合征 20.
  • 这种综合征表现和严重程度各不相同,通常涉及神经系统症状.

研究的目的:

  • 为了确定儿童未被诊断的渐进性脑病变,白内障,运动障碍,内分泌功能障碍和免疫缺陷的遗传原因.
  • 研究LIG3变异在复杂的临床表现中的作用.

主要方法:

  • 重新分析PacBio长期读取的基因组测序数据.
  • 西部斑点分析以评估LIG3蛋白表达.
  • RNA测序 (RNA-seq) 用于分析转录异常.
  • 肌肉活检以评估线粒体功能.

主要成果:

  • 确定了复合异性LIG3变体,包括一个拼接变体和一个新的98bp插入.
  • 确认LIG3蛋白表达的丧失和异常的转录.
  • 肌肉活检显示线粒体功能障碍,COX缺乏纤维和复杂的IV缺乏.

结论:

  • 这项研究报告了LIG3缺乏与免疫和内分泌异常的首次关联.
  • 突出了先进的基因组技术的重要性,如用于诊断复杂遗传疾病的长读测序.
  • 强调LIG3相关疾病的广泛的表型-基因型相关性方法.