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首页> 外文期刊>Revue de chirurgie orthopedique et traumatologique >Distal leg fractures: How critical is the fibular fracture and its fixation? [Fractures de jambe distales: quelle importance attacher à la fracture fibulaire et à son ostéosynthèse ?]
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Distal leg fractures: How critical is the fibular fracture and its fixation? [Fractures de jambe distales: quelle importance attacher à la fracture fibulaire et à son ostéosynthèse ?]

机译:腿远端骨折:腓骨骨折及其固定的关键性如何? [腿部远端骨折:腓骨骨折及其骨合成应重视什么?]

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摘要

Morpheus' Molecule1 (MOM1) is a plant-specific epigenetic regulator of transcriptional gene silencing. Mutants of MOM1 release silencing of subsets of endogenous repetitive elements and transgenes without affecting their cytosine methylation status. Although MOM1 is evolutionarily related to Chromodomain Helicase DNA Binding Protein3 (CHD3), a family of chromatin remodeling proteins involved in repression of gene expression, MOM1 does not carry the functional ATPase/helicase domain essential for chromatin remodeling activity, and therefore, its mode of action is unknown. We recently performed a genome-wide survey for endogenous targets silenced by MOM1 and identified loci that are concentrated around centromeres and rich in sequences homologous to the 24-nt small interfering RNAs (siRNAs) that accumulate in wild type plants. Further and independent analyses indicated that the degree of contribution of MOM1 to maintenance of the silent states varies in different loci and that other silencing machineries, including those in the RNAdirected DNA methylation (RdDM) pathway, interact genetically with MOM1. In this short article, I review what we know about MOM1 and discuss its possible functions in silencing through examination of other silencing factors that interact genetically with MOM1.
机译:Morpheus的Molecule1(MOM1)是转录基因沉默的植物特异性表观遗传调控因子。 MOM1的突变体释放内源性重复元件和转基因子集的沉默,而不会影响它们的胞嘧啶甲基化状态。尽管MOM1在进化上与染色质重塑蛋白家族(Chromodomain Helicase DNA Binding Protein3,CHD3)有关,而染色质重塑蛋白家族涉及基因表达的抑制,但是MOM1没有携带对染色质重塑活性至关重要的功能性ATPase /解旋酶结构域,因此,动作未知。我们最近对MOM1沉默的内源性靶标进行了全基因组范围的调查,并确定了集中在着丝粒周围且富含与野生型植物中积累的24 nt小干扰RNA(siRNA)同源的序列的基因座。进一步的独立分析表明,MOM1对维持沉默状态的贡献程度在不同基因座上有所不同,其他沉默机制,包括RNA定向DNA甲基化(RdDM)途径中的沉默机制,与MOM1发生了遗传相互作用。在这篇简短的文章中,我将回顾我们对MOM1的了解,并通过检查与MOM1遗传相互作用的其他沉默因子来讨论其在沉默中的可能功能。

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