The adenine methylation debate.

The adenine methylation debate.
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DOI:
10.1126/science.abn6514
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发表时间:
2022-02-04
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Science (New York, N.Y.)
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腺嘌呤甲基化是原核生物中普遍存在的一种DNA修饰,形成N6-甲基-2 ′-脱氧腺苷(6 mA),最近被认为存在于多细胞真核生物(后生动物)中,调节多种过程,包括转录、应激反应和肿瘤发生。然而,在后生动物DNA中存在6 mA,因此其生物学重要性在最近的研究中一直存在争议,这些研究要么在比最初报道的低得多的丰度下检测到6 mA,要么根本没有检测到6 mA。在本期的第515页,Konget al.report介绍了6 mASCOPE的开发,这是一种定量方法,可以对来自污染源的感兴趣样品中的6 mA进行去卷积。他们在果蝇(果蝇)、植物(拟南芥)和人类中检测到少量的6 mA,这表明6 mA在这些生物体中的丰度比之前想象的要低得多。这些数据表明,重新评估6 mA在真核DNA是必要的。
Adenine methylation, forming N6-methyl-2′-deoxyadenosine (6mA), is a prevalent DNA modification in prokaryotes and has recently been proposed to exist in multicellular eukaryotes (metazoans) to regulate diverse processes, including transcription, stress responses, and tumorigenesis. However, the existence of 6mA, and therefore its biological importance, in metazoan DNA has been debated by recent studies, which have either detected 6mA at much lower abundances than initially reported or failed to detect 6mA at all. On page 515 of this issue, Konget al.report the development of 6mASCOPE, a quantitative method that deconvolutes 6mA in samples of interest from contamination sources. They detected low amounts of 6mA in fruit flies (Drosophila melanogaster), plants (Arabidopsis thaliana), and humans, which suggests that 6mA is much less abundant in these organisms than previously thought. These data suggest that a reassessment of 6mA in eukaryotic DNA is warranted.
N6-甲基脱氧腺苷标记了衣原体中的主动转录起始位点。
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