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相关概念视频

RNA Editing02:23

RNA Editing

9.8K
RNA editing is a post-transcriptional modification where a precursor mRNA (pre-mRNA) nucleotide sequence is changed by base insertion, deletion, or modification. The extent of RNA editing varies from a few hundred bases, in mitochondrial DNA of trypanosomes, to a just single base, in nuclear genes of mammals. Even a single base change in the pre-mRNA can convert a codon for one amino acid into the codon for another amino acid or a stop codon. This type of re-coding can significantly affect the...
9.8K
Base Excision Repair01:54

Base Excision Repair

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One of the common DNA damages is the chemical alteration of single bases by alkylation, oxidation, or deamination. The altered bases cause mispairing and strand breakage during replication. This type of damage causes minimal change to the DNA double helix structure and can be repaired by the base excision repair (BER) pathways. BER corrects damaged DNA sequences by removing the damaged base and restoring the original base sequence using the complementary strand as a template.
The first step of...
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Base Excision Repair01:54

Base Excision Repair

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5.0K
Mismatch Repair01:20

Mismatch Repair

6.3K
Organisms are capable of detecting and fixing nucleotide mismatches that occur during DNA replication. This sophisticated process requires identifying the new strand and replacing the erroneous bases with correct nucleotides. Mismatch repair is coordinated by many proteins in both prokaryotes and eukaryotes.
The Mutator Protein Family Plays a Key Role in DNA Mismatch Repair
The human genome has more than 3 billion base pairs of DNA per cell. Prior to cell division, that vast amount of genetic...
6.3K
Mismatch Repair01:36

Mismatch Repair

43.5K
Overview
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Animal Mitochondrial Genetics02:59

Animal Mitochondrial Genetics

9.0K
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...
9.0K

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Dopaminergic neurons preferentially accumulate mtDNA rearrangements.

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相关实验视频

Updated: Jan 17, 2026

Genotyping Single Nucleotide Polymorphisms in the Mitochondrial Genome by Pyrosequencing
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Genotyping Single Nucleotide Polymorphisms in the Mitochondrial Genome by Pyrosequencing

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mtDNA基编辑:注意差距的差距

Jose Domingo Barrera-Paez1, Carlos T Moraes2

  • 1MRC Mitochondrial Biology Unit, University of Cambridge, Cambridge, UK.

Molecular cell
|September 19, 2025
PubMed
概括

研究人员为精确的线粒体DNA基编辑设计了DdCBE. 定义编辑窗口提高了准确性,推进了基础编辑技术.

科学领域:

  • 分子生物学分子生物学
  • 遗传学 是一个遗传学.
  • 生物化学 生物化学

背景情况:

  • 线粒体DNA (mtDNA) 基编辑提供治疗潜力,但在精度方面面临挑战.
  • 基编辑器 (CBEs) 是基编辑的工具,但它们在线粒体中的应用需要优化.

研究的目的:

  • 阐明DdCBE用于线粒体DNA基编辑的机制.
  • 设计DdCBE以提高mtDNA编辑的精度和效率.
  • 使用结构洞察力指导工程工作.

主要方法:

  • 在DdCBE的结构指导工程.
  • 生物化学测试以评估编辑活动和精度.
  • 编辑窗口的分析,以优化准.

主要成果:

  • 阳等人. 其他. 提供了对DdCBE机制的关键见解.
  • 结构引导工程导致了改进的DdCBE变体.
  • 通过定义编辑窗口来实现精确的mtDNA基编辑.

结论:

  • DdCBE可以有效地被设计为精确的线粒体DNA基编辑.

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  • 了解机制和编辑窗口对于优化基础编辑器至关重要.
  • 这项工作推动了mtDNA基编辑工具的开发.