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相关概念视频

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

Translation

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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.
Translation Produces the Building Blocks of Life
Proteins are...
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Animal Mitochondrial Genetics02:59

Animal Mitochondrial Genetics

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Among all the organelles in an animal cell, only mitochondria have their own independent genomes. Animal mitochondrial DNA is a double-stranded, closed-circular molecule with around 20,000 base pairs. Mitochondrial DNA is unique in that one of its two strands, the heavy, or H, -strand is guanine rich, whereas the complementary strand is cytosine rich and called the light, or L, -strand. Compared to nuclear DNA, mitochondrial DNA has a very low percentage of non-coding regions and is marked by...
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ATP Synthase: Mechanism01:48

ATP Synthase: Mechanism

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In animals, the mitochondrial F1F0 ATP synthase is the key protein that synthesizes ATP molecules through a complex catalytic mechanism. While the nuclear genome encodes the majority of ATP synthase subunits, the mitochondrial genome encodes some of the enzyme's most critical components. The formation of this multi-subunit enzyme is a complex multi-step process regulated at the level of transcription, translation, and assembly. Defects in one or more of these steps can result in decreased...
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Mitochondrial Protein Sorting01:39

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Mitochondria are double-membrane organelles of the eukaryotes involved in cellular metabolism, signaling, ATP synthesis, and programmed cell death.  Each of these processes requires specific proteins and enzymes that must be correctly sorted to the right mitochondrial subcompartment for the proper functioning of the organelle.
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Mitochondrial Precursor Proteins01:39

Mitochondrial Precursor Proteins

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Mitochondrial precursors are partially unfolded or loosely folded polypeptide chains. Newly synthesized precursors are inhibited from spontaneously folding into their native conformation by the cytosolic chaperones, heat shock proteins 70 (Hsp70), and mitochondrial import stimulation factors (MSFs). Precursors bound to MSFs are guided to the TOM70-TOM37 receptors, while precursors bound to Hsp70  chaperones are targetted to TOM20-TOM22 receptor complexes.
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相关实验视频

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Modeling Mitochondrial Disease Using Brain Organoids: A Focus on Mitochondrial Encephalomyopathy, Lactic Acidosis, and Stroke-like Episodes
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线粒体tRNA衍生的疾病

Antonia Petropoulou1, Nikolaos Kypraios1, Dimitra Rizopoulou1

  • 1Department of Biochemistry, School of Medicine, University of Patras, 26504 Patras, Greece.

International journal of molecular sciences
|December 30, 2025
PubMed
概括
此摘要是机器生成的。

线粒体tRNA基因突变通过破坏蛋白质的生产,导致许多疾病. 本综述详细介绍了500种变异,强调了它们的广泛影响和基因编辑疗法的潜力.

关键词:
人类疾病 人类疾病这是线粒体tRNA.在mt-tRNA中发生的修改在mtDNA突变中发生突变.

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科学领域:

  • 遗传学和分子生物学
  • 线粒体生物学 线粒体生物学
  • 基因组医学是基因组医学.

背景情况:

  • 线粒体tRNA (mt-tRNA) 基因是导致线粒体疾病的突变的热点.
  • 这些突变占致病性mtDNA变异的70-75%,影响氧化酸化,导致多系统性疾病.
  • 了解这些变异对于诊断和治疗复杂的遗传疾病至关重要.

研究的目的:

  • 系统地审查和分类临床相关的致病性mt-tRNA突变.
  • 分析受影响的器官系统和这些突变的潜在分子机制.
  • 探索基因组编辑治疗mt-tRNA相关疾病的潜力.

主要方法:

  • 对PubMed,Scopus和MITOMAP数据库的系统文献审查,截至2025年10月.
  • 根据临床相关性,受影响的器官系统和分子机制,对致病性mt-tRNA突变进行索引.
  • 在所有22个mt-tRNA基因中识别和分类不同的致病变体.

主要成果:

  • 确定了大约500种不同的致病性mt-tRNA变体.
  • 突变涉及到超越经典综合征的各种疾病,包括心血管,神经肌肉,感官,代谢,脏,神经精神和瘤疾病.
  • 转录后修改系统中的缺陷与序列突变一起代表了关键疾病机制.

结论:

  • 致病性mt-tRNA突变涉及到各种各样的人类疾病.
  • 针对性基因组编辑疗法显示出对线粒体疾病的精确干预有前途,尽管目前存在翻译方面的挑战.
  • 对mt-tRNA突变机制和治疗纠正的进一步研究是有必要的.