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间隙克默序列建模稳定地识别了在进化上遥远的哺乳动物之间保存的调节词汇和远程增强剂
1Department of Biomedical Engineering and McKusick-Nathans Department of Genetic Medicine, Johns Hopkins University, Baltimore, MD, USA.
Nature communications
|July 31, 2024
概括
识别人类和小鼠之间保存的基因调控元素对于疾病研究至关重要. 我们的新算法gkm-align显著提高了这些关键的保护增强剂的发现.
科学领域:
- 基因组学就是基因组学.
- 进行比较基因组学.
- 监管基因组学 监管基因组学
背景情况:
- 基因调节元素对生物过程至关重要,它们的突变与人类疾病有关.
- 在像小鼠这样的模型生物中研究人类调节变异是常见的,但由于快速进化和计算限制,这是具有挑战性的.
- 将人类增强剂映射到保存的小鼠元素是困难的.
研究的目的:
- 在匹配的人/小鼠细胞/组织对中分析增强剂保护.
- 开发一种改进的基因组对齐算法,用于预测正统的监管元素.
- 为了确定新的保存增强剂,现有方法错过了它们.
主要方法:
- 使用DNase-seq数据对45个匹配的人/小鼠细胞/组织对进行远端增强剂的分析.
- 开发gkm-align,一种利用间隙-kmer特征的基因组对齐算法.
- 1,401,803个正统的调节元素的全基因组预测.
主要成果:
- 细胞特异性的监管词汇被保留,但增强剂的发展速度比促进剂和CTCF站点要快.
- 增强剂的保存率因细胞类型而异,受到可转移元素活性的影响.
- Gkm-align确定了23,660种新的人类/小鼠保存增强剂,具有保留功能的证据.
结论:
- 增强剂表现出快速进化,保存率因细胞类型而异,受可转移元素的影响.
- 该gkm-align算法增强了物种之间保存的调节元素的发现.
- 这种改进的方法有助于理解使用模型生物体的人类调节变异的功能影响.
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