拷贝数规范化区分由拷贝数差异驱动的差异信号在ATAC-seq和ChIP-seq
Dingwen Su1, Moritz Peters2, Volker Soltys2
1Friedrich Miescher Laboratory of the Max Planck Society, Tübingen, 72076, Germany. dingwen.su@tuebingen.mpg.de.
BMC genomics
|March 29, 2025
概括
副本数量的变化显著影响ATAC-seq和ChIP-seq分析. 我们的新管道对副本数进行正常化,准确地区分真实生物信号和变异,改进差异分析.
科学领域:
- 基因组学就是基因组学.
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 生物信息学是一种生物信息学.
背景情况:
- ATAC-seq和ChIP-seq对于识别差异性基因组信号至关重要.
- 拷贝数变化 (CNV) 在差异分析中经常被忽视,可能导致结果混.
- 在测序数据中,CNV可以显著影响观察到的差异信号.
研究的目的:
- 开发和验证一个生物信息管道,用于ATAC-seq和ChIP-seq数据中的副本编号规范化.
- 为了区分真正的生物信号和由副本数变化驱动的生物信号.
- 评估复制数正常化对理解像唐氏综合征这样的疾病中的基因表达的影响.
主要方法:
- 开发一种新的生物信息管道,包括复制号码规范化.
- 对每个基因拷贝的平均信号进行比较,以分离由CNV驱动的效应.
- 管道的应用用于分析唐氏综合征的差异信号,重点是21号染色体.
主要成果:
- 证明副本数的差异可以驱动或主导数据序列的差异信号.
- 拟议的副本数规范化管道有效地将CNV驱动的信号与其他生物因素分开.
- 对唐氏综合征的分析揭示了21号染色体上明显的剂量依赖和剂量独立的分子变化.
结论:
- 拷贝数规范化是ATAC-seq和ChIP-seq差分分析的关键和推的一般方法.
- 精确识别差异信号需要考虑副本数量的变化.
- 这种方法提高了表观遗传和基因组信号解释的可靠性.
相关概念视频
02:46Genome Copying Errors
DNA replication is a well-evolved process that copies millions of base pairs with high fidelity during each cell division. Occasionally a wrong base or a long stretch of wrong bases may get added to the daughter strands. If the errors are left unchecked, cells might accumulate several mutations that might endanger their survival. Therefore, the copying errors are checked and repaired at three levels.
02:26Comparing Copy Number Variations and SNPs
Sequencing of the human genome has opened up several best-kept secrets of the genome. Scientists have identified thousands of genome variations that exist within a population. These variations can be a single nucleotide or a larger chromosomal variation.
Copy number variations or CNVs are the structural variations that cover more than 1kb of DNA sequence. The single nucleotide polymorphism (SNP), on the other hand, is a single nucleotide change or a point mutation that is found in more than 1%...
Copy number variations or CNVs are the structural variations that cover more than 1kb of DNA sequence. The single nucleotide polymorphism (SNP), on the other hand, is a single nucleotide change or a point mutation that is found in more than 1%...
02:57Real Time RT-PCR
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The real-time quantification of the number of amplified products is...
The real-time quantification of the number of amplified products is...
03:00Next-generation Sequencing
The first human genome sequencing project cost $2.7 billion and was declared complete in 2003, after 15 years of international cooperation and collaboration between several research teams and funding agencies. Today, with the advent of next-generation sequencing technologies, the cost and time of sequencing a human genome have dropped over 100 fold.
Next-Generation Sequencing Methods
Although all next-generation methods use different technologies, they all share a set of standard features.
Next-Generation Sequencing Methods
Although all next-generation methods use different technologies, they all share a set of standard features.
03:21RNA-seq
RNA sequencing, or RNA-Seq, is a high-throughput sequencing technology used to study the transcriptome of a cell. Transcriptomics helps to interpret the functional elements of a genome and identify the molecular constituents of an organism. Additionally, it also helps in understanding the development of an organism and the occurrence of diseases.
Before the discovery of RNA-seq, microarray-based methods and Sanger sequencing were used for transcriptome analysis. However, while microarray-based...
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