当前位置: X-MOL 学术Plant Sci. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Histone post-translational modifications in Silene latifolia X and Y chromosomes suggest a mammal-like dosage compensation system
Plant Science ( IF 4.2 ) Pub Date : 2020-10-01 , DOI: 10.1016/j.plantsci.2020.110528
José Luis Rodríguez Lorenzo 1 , Marcel Hubinský 1 , Boris Vyskot 1 , Roman Hobza 1
Affiliation  

Silene latifolia is a model organism to study evolutionary young heteromorphic sex chromosome evolution in plants. Previous research indicates a Y-allele gene degeneration and a dosage compensation system already operating. Here, we propose an epigenetic approach based on analysis of several histone post-translational modifications (PTMs) to find the first epigenetic hints of the X:Y sex chromosome system regulation in S. latifolia. Through chromatin immunoprecipitation we interrogated six genes from X and Y alleles. Several histone PTMS linked to DNA methylation and transcriptional repression (H3K27me3, H3K23me, H3K9me2 and H3K9me3) and to transcriptional activation (H3K4me3 and H4K5, 8, 12, 16ac) were used. DNA enrichment (Immunoprecipitated DNA/input DNA) was analyzed and showed three main results: (i) promoters of the Y allele are associated with heterochromatin marks, (ii) promoters of the X allele in males are associated with activation of transcription marks and finally, (iii) promoters of X alleles in females are associated with active and repressive marks. Our finding indicates a transcription activation of X allele and transcription repression of Y allele in males. In females we found a possible differential regulation (up X1, down X2) of each female X allele. These results agree with the mammal-like epigenetic dosage compensation regulation.

中文翻译:

Silene latifolia X 和 Y 染色体中的组蛋白翻译后修饰表明存在类似哺乳动物的剂量补偿系统

Silene latifolia 是研究植物进化年轻异形性染色体进化的模式生物。先前的研究表明 Y 等位基因基因变性和剂量补偿系统已经在运行。在这里,我们提出了一种基于对几种组蛋白翻译后修饰 (PTM) 的分析的表观遗传方法,以寻找阔叶 S. latifolia 中 X:Y 性染色体系统调控的第一个表观遗传线索。通过染色质免疫沉淀,我们询问了来自 X 和 Y 等位基因的六个基因。使用了几种与 DNA 甲基化和转录抑制(H3K27me3、H3K23me、H3K9me2 和 H3K9me3)和转录激活(H3K4me3 和 H4K5、8、12、16ac)相关的组蛋白 PTMS。分析了 DNA 富集(免疫沉淀 DNA/输入 DNA)并显示了三个主要结果:(i) Y 等位基因的启动子与异染色质标记相关,(ii) 男性中 X 等位基因的启动子与转录标记的激活相关,最后,(iii) 女性中 X 等位基因的启动子与活性和抑制性标记相关. 我们的发现表明男性中 X 等位基因的转录激活和 Y 等位基因的转录抑制。在雌性中,我们发现每个雌性 X 等位基因可能存在差异调节(向上 X1,向下 X2)。这些结果与哺乳动物样表观遗传剂量补偿调节一致。我们的发现表明男性中 X 等位基因的转录激活和 Y 等位基因的转录抑制。在雌性中,我们发现每个雌性 X 等位基因可能存在差异调节(向上 X1,向下 X2)。这些结果与哺乳动物样表观遗传剂量补偿调节一致。我们的发现表明男性中 X 等位基因的转录激活和 Y 等位基因的转录抑制。在雌性中,我们发现每个雌性 X 等位基因可能存在差异调节(向上 X1,向下 X2)。这些结果与哺乳动物样表观遗传剂量补偿调节一致。
更新日期:2020-10-01
down
wechat
bug