格兰杰对DAG的因果推断确定了调节转录的基因组位置
Rohit Singh1, Alexander P Wu1, Bonnie Berger1,2
1Computer Science and Artificial Intelligence Laboratory, MIT, Cambridge, MA 02139, USA.
概括
GrID-Net 推进了针对定向非循环图的格兰杰因果关系,使细胞分化等复杂系统中的因果推理成为可能. 这种新方法从单细胞数据准确地识别基因调节网络.
科学领域:
- 计算生物学 计算生物学
- 系统生物学 系统生物学
- 基因组学就是基因组学.
背景情况:
- 格兰杰因果关系有效地检测了顺序数据中的相互作用,但与复杂的非线性系统作斗争.
- 定向非循环图 (DAG) 对于模拟细胞分化等生物过程至关重要,但传统的格兰杰因果关系不适合这些结构.
研究的目的:
- 开发一个新的框架,Grid-Net,用于使用图形神经网络对DAG结构系统的格兰杰因果推理.
- 调整格兰杰因果关系来分析单细胞多模式数据和识别基因调节相互作用.
主要方法:
- GrID-Net使用带有滞后消息传递的图形神经网络来推断DAG中的因果关系.
- 该框架整合了来自同一细胞的染色质可访问性 (ATAC-seq) 和基因表达 (RNA-seq) 数据.
主要成果:
- 在DAG结构系统中,Grid-Net成功地推断了格兰杰因果关系,超过了现有的方法.
- 该工具准确地识别了监管基因与基因的联系,显示与人口遗传学估计的一致性高达71%以上.
- GrID-Net解释了基因组位点可访问性和下游基因表达变化之间的时间滞后.
结论:
- GrID-Net将格兰杰因果关系扩展到DAG,使因果分析能够在新的领域进行.
- 这项工作为阐明细胞分化和疾病中的基因调节相互作用提供了强大的工具.
更多相关视频
12:24DNA-affinity-purified Chip DAP-chip Method to Determine Gene Targets for Bacterial Two component Regulatory Systems
Published on: July 21, 2014
17.4K
10:44Inherent Dynamics Visualizer, an Interactive Application for Evaluating and Visualizing Outputs from a Gene Regulatory Network Inference Pipeline
Published on: December 7, 2021
2.7K
相关概念视频
Cis-regulatory Sequences
12.0K
Cis-regulatory sequences are short fragments of non-coding DNA that are present on the same chromosomes as the genes that they regulate. These fragments serve as binding sites for transcriptional regulators, proteins that are responsible for controlling gene transcription and differential gene expression across cell types in eukaryotes. Cis-regulatory sequences can be close to the gene of interest or thousands of bases away in the DNA sequence; however, those sequences that are further away are...
12.0K
Combinatorial Gene Control
9.8K
Combinatorial gene control is the synergistic action of several transcriptional factors to regulate the expression of a single gene. The absence of one or more of these factors may lead to a significant difference in the level of gene expression or repression.
The expression of more than 30,000 genes is controlled by approximately 2000-3000 transcription factors. This is possible because a single transcription factor can recognize more than one regulatory sequence. The specificity in gene...
The expression of more than 30,000 genes is controlled by approximately 2000-3000 transcription factors. This is possible because a single transcription factor can recognize more than one regulatory sequence. The specificity in gene...
9.8K
Genome-wide Association Studies-GWAS
16.0K
Genome-wide association studies or GWAS are used to identify whether common SNPs are associated with certain diseases. Suppose specific SNPs are more frequently observed in individuals with a particular disease than those without the disease. In that case, those SNPs are said to be associated with the disease. Chi-square analysis is performed to check the probability of the allele likely to be associated with the disease.
GWAS does not require the identification of the target gene involved in...
GWAS does not require the identification of the target gene involved in...
16.0K
Chromatin Position Affects Gene Expression
25.1K
Chromatin is the massive complex of DNA and proteins packaged inside the nucleus. The complexity of chromatin folding and how it is packaged inside the nucleus greatly influences access to genetic information. Generally, the nucleus' periphery is considered transcriptionally repressive, while the cell's interior is considered a transcriptionally active area.
Topologically Associated Domains (TADs)
The 3-dimensional positioning of chromatin in the nucleus influences the...
Topologically Associated Domains (TADs)
The 3-dimensional positioning of chromatin in the nucleus influences the...
25.1K
Position-effect Variegation
7.2K
In 1928, a German botanist Emil Heitz observed the moss nuclei with a DNA binding dye. He observed that while some chromatin regions decondense and spread out in the interphase nucleus, others do not. He termed them euchromatin and heterochromatin, respectively. He proposed that the heterochromatin regions reflect a functionally inactive state of the genome. It was later confirmed that heterochromatin is transcriptionally repressed, and euchromatin is transcriptionally active chromatin.
7.2K
Exon Recombination
4.2K
The evolution of new genes is critical for speciation. Exon recombination, also known as exon shuffling or domain shuffling, is an important means of new gene formation. It is observed across vertebrates, invertebrates, and in some plants such as potatoes and sunflowers. During exon recombination, exons from the same or different genes recombine and produce new exon-intron combinations, which might evolve into new genes.
Exon shuffling follows “splice frame rules.” Each exon...
Exon shuffling follows “splice frame rules.” Each exon...
4.2K
