对"DNA损伤是排序错误的普遍原因,直接混变体识别"的评论
Lixin Chen1, Pingfang Liu1, Thomas C Evans2
1New England Biolabs Inc., Ipswich, MA 01938, USA.
概括
DNA损伤,特别是氧化损伤,影响癌症基因组图谱 (TCGA) 数据中突变检测的准确性. 这影响了癌症基因组研究中识别体变异的可靠性.
科学领域:
- 基因组学
- 生物信息学
- 癌症研究
背景情况:
- 准确识别体质变异对于了解癌症发展至关重要.
- 在测序数据中可能会引入遗传物,从而对突变检测造成混乱.
- 之前的分析可能没有完全解释所有DNA损伤的来源.
研究的目的:
- 使用癌症基因组图谱 (TCGA) 数据重新评估DNA损伤对突变的影响.
- 在基因组测序数据中证实氧化损伤的发现.
- 评估测序日期和背景对突变检测准确性的影响.
主要方法:
- 重新分析TCGA测序数据.
- 斯图尔特等人提出的特定参数的应用.
- 检查序列背景的氧化损伤迹象.
主要成果:
- 在所有分析的序列环境中检测到氧化损伤.
- 无论测序日期如何,都存在氧化损伤的证据.
- 这些发现再次证实DNA损伤会影响突变调用管道.
结论:
- DNA损伤,特别是氧化损伤,是影响体质变异识别准确性的重要因素.
- 突变调用管道需要对DNA损伤文物进行强有力的解释.
- 进一步优化生物信息学工具对于可靠的癌症基因组分析是必要的.
相关概念视频
Mismatch Repair
Overview
Nucleotide Excision Repair
Overview
Overview of DNA Repair
In order to be passed through generations, genomic DNA must be undamaged and error-free. However, every day, DNA in a cell undergoes several thousand to a million damaging events by natural causes and external factors. Ionizing radiation such as UV rays, free radicals produced during cellular respiration, and hydrolytic damage from metabolic reactions can alter the structure of DNA. Damages caused include single-base alteration, base dimerization, chain breaks, and cross-linkage.
Chemically...
Chemically...
Overview of DNA Repair
In order to be passed through generations, genomic DNA must be undamaged and error-free. However, every day, DNA in a cell undergoes several thousand to a million damaging events by natural causes and external factors. Ionizing radiation such as UV rays, free radicals produced during cellular respiration, and hydrolytic damage from metabolic reactions can alter the structure of DNA. Damages caused include single-base alteration, base dimerization, chain breaks, and cross-linkage.
Chemically...
Chemically...
Nucleotide Excision Repair
DNA Distortion and Damage
Cells are regularly exposed to mutagens—factors in the environment that can damage DNA and generate mutations. UV radiation is one of the most common mutagens and is estimated to introduce a significant number of changes in DNA. These include bends or kinks in the structure, which can block DNA replication or transcription. If these errors are not fixed, the damage can cause mutations, which in turn can result in cancer or disease depending on which sequences are...
Cells are regularly exposed to mutagens—factors in the environment that can damage DNA and generate mutations. UV radiation is one of the most common mutagens and is estimated to introduce a significant number of changes in DNA. These include bends or kinks in the structure, which can block DNA replication or transcription. If these errors are not fixed, the damage can cause mutations, which in turn can result in cancer or disease depending on which sequences are...
Mismatch Repair
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...
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...


