Set2和H3K36以特定环境的方式调节Drosophila雄性X染色体,独立于MSL复合体传播
Harmony R Salzler1, Vasudha Vandadi1, Julia R Sallean2
1Integrative Program for Biological and Genome Sciences, University of North Carolina, Chapel Hill, NC 27599, USA.
Genetics
|October 17, 2024
概括
在Drosophila中,剂量补偿不仅仅取决于MSL复合体通过H3K36me3.3传播. Set2和H3K36间接支持基因调节,具有两性共同的功能.
科学领域:
- * 遗传学 在遗传学方面
- * 分子生物学 * 分子生物学
- * 表观遗传学 是一种表观遗传学.
背景情况:
- * 在Drosophila中,剂量补偿 (DC) 将男性X链基因调高两倍.
- *MSL (男性特异性致死性) 复合体通过结合高亲和位点并扩散到附近的基因来调解DC.
- *目前的模型暗示MSL3与Set2依赖的H3K36me3标志在MSL传播中的相互作用.
研究的目的:
- * 调查Set2和H3K36甲基化在Drosophila剂量补偿中的作用.
- * 在基因调节中区分男性特异性和X染色体特异性影响.
- * 为了测试MSL复合的流行模型,MSL复合的扩散取决于H3K36me3.3.
主要方法:
- *使用H3K36残留物和Drosophila中的Set2'writer'突变体的基因组方法.
- *差异基因表达分析,比较突变体和对照条件.
- *对差异表达基因 (DEGs) 的动因分析.
主要成果:
- *Set2在X基因调节中发挥作用,但影响并不仅限于男性.
- *失去Set2或H3K36导致异质的,而不是全球的基因表达变化.
- *DEGs在失去H3K36或Set2时显示了相互表达的变化,表明了相反的功能.
- *组合H3.2K36R/H3.3K36R突变并没有显示X基因表达减少或与MSL3结合的相关性.
- * BEAF-32和绝缘蛋白与Set2/H3K36依赖的调节有关.
结论:
- * H3K36me3对于MSL复杂传播至关重要的主流模型与数据不一致.
- * Set2和H3K36可能通过MSL使用的机制间接支持剂量补偿,但在两性中都是常见的.
- * 这表明剂量补偿的监管网络比以前理解的更复杂.
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