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Trans-chromosomal methylation

机译:跨染色体甲基化

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摘要

The epigenome plays a vital role in helping to maintain and regulate cell functions in all organisms. Alleles with differing epigenetic marks in the same nucleus do not function in isolation but can interact in trans to modify the epigenetic state of one or both alleles. This is particularly evident when two divergent epigenomes come together in a hybrid resulting in thousands of alterations to the methylome. These changes mainly involve the methylation patterns at one allele being changed to resemble the methylation patterns of the other allele, in processes we have termed trans-chromosomal methylation (TCM) and trans-chromosomal demethylation (TCdM). These processes are primarily modulated by siRNAs and the RNA directed DNA Methylation pathway. Drawing from other examples of transallelic interactions, we describe the process of TCM and TCdM and the effect such changes can have on genome activity. Trans-allelic epigenetic interactions may be a common occurrence in many biological systems.
机译:表观基因组在帮助维持和调节所有生物体的细胞功能中起着至关重要的作用。在同一核中具有不同表观遗传标记的等位基因不能单独发挥作用,而是可以反式相互作用来修饰一个或两个等位基因的表观遗传状态。当两个不同的表观基因组以杂种形式结合在一起时,这会导致成千上万的甲基化基因组改变,这一点尤其明显。这些变化主要涉及一个等位基因的甲基化模式被改变以类似于另一等位基因的甲基化模式,在我们称为反染色体甲基化(TCM)和反染色体去甲基化(TCdM)的过程中。这些过程主要受siRNA和RNA指导的DNA甲基化途径调控。从其他等位基因相互作用的例子中,我们描述了中医和TCdM的过程,以及这种变化对基因组活性的影响。反式等位基因表观遗传相互作用可能是许多生物系统中的常见现象。

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