机器学习推断基因调节网络在培育苗种子中的作用
Albert Tucci1, Miguel A Flores-Vergara1, Robert G Franks1
1Department of Plant and Microbial Biology, North Carolina State University, Raleigh, NC 27695, USA.
Plants (Basel, Switzerland)
|December 17, 2024
概括
开花植物的种子通过创造繁殖障碍来推动多样化. 这项研究推断了Mimulus杂交种子中的基因调节网络,揭示了种子发育和物种化背后的新型遗传机制.
科学领域:
- 进化生物学 进化生物学
- 植物科学 植物科学
- 遗传学 遗传学 是一个
背景情况:
- 雄种子是推动植物多样化的关键进化创新.
- 杂交后的繁殖障碍,如杂交种子不可行性,对于物种化至关重要.
- 苗属为研究以种子为基础的生殖隔离提供了一个模型.
研究的目的:
- 为了研究基因调控网络 (GRN) 在开发Mimulus杂交种子中的推断.
- 确定基因调节机制,对种子发育和生殖障碍至关重要.
- 为了生成Mimulus中假定基因规则的参考集合.
主要方法:
- 利用了可行的Mimulus杂交种子的时间序列RNA测序数据.
- 应用了两个GRN推理算法:RTP-STAR和KBoost.
- 分析了转录组数据子集,以推断基因调节关系.
主要成果:
- 从Mimulus杂交种子的转录基因数据中成功推断出GRNs.
- 确定了两个算法之间的重叠和独特的基因规则.
- 突出了可能涉及种子开发的新型监管机制.
结论:
- GRN推断是一种强大的方法,用于发现植物种子中的基因调节机制.
- 这项研究提供了Mimulus中生殖障碍的遗传基础的见解.
- 已识别的假定基因规则需要进一步研究它们在物种化中的作用.
相关概念视频
Regulation of Expression Occurs at Multiple Steps
Gene expression can be regulated at almost every step from gene to protein. Transcription is the step that is most commonly regulated. This involves the binding of proteins to short regulatory sequences on the DNA. This association can either promote or inhibit the transcription of a gene associated with the respective sequence.
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...
Cis-regulatory Sequences
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...
Combinatorial Gene Control
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...
Regulation of Expression Occurs at Multiple Steps
Gene expression can be regulated at almost every step from gene to protein. Transcription is the step that is most commonly regulated. This involves the binding of proteins to short regulatory sequences on the DNA. This association can either promote or inhibit the transcription of a gene associated with the respective sequence.
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...
Regulation of Expression at Multiple Steps
The gene expression in cells is regulated at different stages: (i) transcription, (ii) RNA processing, (iii) RNA localization, and (iv) translation. Transcriptional regulation is mediated by regulatory proteins such as transcription factors, activators, or repressors—these control gene expression by initiating or inhibiting the transcription of genes. Once a precursor or pre-mRNA is produced, it undergoes post-transcriptional modification, including 5' capping, splicing, and the addition of a...


