导致基因组修饰的ChIP-seq峰值高度的等位基因特异性结合变异在表达QTL注释中没有得到丰富
Mohammad Ghoreishifar1,2, Amanda J Chamberlain3,4, Ruidong Xiang3,5
1Agriculture Victoria Research, AgriBio Centre for AgriBioscience, Bundoora, VIC, 3083, Australia. mohammad.ghoreishifar@agriculture.vic.gov.au.
Genetics, selection, evolution : GSE
|June 27, 2024
概括
我们确定了 DNA 序列,预测基因特异结合 (ASB) QTL,这些基因特异结合 (ASB) QTL 影响了奶牛的基因组修饰. 这些发现表明,许多影响基因组修饰的部位可能不会直接影响基因表达.
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.
- 动物遗传学动物遗传学
背景情况:
- 与复杂特征相关的基因组序列变异通常存在于功能性基因组区域,影响基因表达.
- 链接不平衡使确定定量特征位置 (QTL) 变得复杂.
- 基因特异结合 (ASB) QTL (asbQTL) 可以解释基因组修饰的变化.
研究的目的:
- 在牛乳腺中识别asbQTL影响质子修饰 (H3K4me3,H3K27ac).
- 开发对染色体免疫沉降测序 (ChIP-seq) 峰值高度变异效应的预测模型.
主要方法:
- 使用间隙k-mer支向量机,最好的线性无偏预测和多重线性回归模型.
- 预测变体对ChIP-seq峰值高度的影响,以确定候选asbQTL.
- 使用独立数据评估了候选asbQTL的预测准确度 (0.590.74) 和功能丰富.
主要成果:
- 对H3K4me3.3的非致病部位 (P < 0.01) 进行比较,确定了为ASB丰富的asbQTL候选物.
- 候选asbQTL没有表达QTL (eQTL),基因特异表达QTL (aseQTL) 或保存站点的丰富.
- 预测模型根据周围的DNA序列确定了asbQTL的假定因果部位.
结论:
- 使用DNA序列信息开发了一种方法来识别假定因果性asbQTL.
- 结果表明,许多影响基因素修饰的部位可能不会直接改变基因表达.
- 统计功率的限制可能会挑战因果ASB站点和影响基因表达的链接非因果站点之间的区别.
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