Rosalind and Morris Goodman Cancer Center, Department of Biochemistry, McGill University, Montreal, Quebec, Canada.
EMBO J. 2013 Jul 3;32(13):1799-801. doi: 10.1038/emboj.2013.136. Epub 2013 Jun 11.
Regulated degradation plays a major role in determining the levels of both non-coding (miRNA) and coding (mRNA) transcripts. Thus, insights into the factors and pathways that influence this process have broad, interdisciplinary implications. New findings by Malecki et al (2013), Lubas et al (2013), and Chang et al (2013) identify the protein Dis3L2 as a major player in the 3′–5′ exonucleolytic decay of transcripts. Furthermore, they demonstrate a strong connection between terminal uridylation of the RNA substrate and enzymatic activity.
调控降解在确定非编码(miRNA)和编码(mRNA)转录本的水平方面起着重要作用。因此,深入了解影响这一过程的因素和途径具有广泛的跨学科意义。Malecki 等人(2013 年)、Lubas 等人(2013 年)和 Chang 等人(2013 年)的新发现确定了蛋白 Dis3L2 是转录物 3′–5′外切核酸酶降解的主要参与者。此外,他们还证明了 RNA 底物的末端尿苷酸化与酶活性之间存在很强的联系。