Stowers Institute for Medical Research, 1000 East 50th Street, Kansas City, MO 64110, USA.
Cell Res. 2013 Oct;23(10):1153-4. doi: 10.1038/cr.2013.100. Epub 2013 Jul 30.
How cells ensure that productive transcription from divergent promoters is limited to the downstream protein-coding region is an important question in the transcription field. A recent study in Nature proposed an answer by revealing that the upstream antisense transcripts undergo early termination through the polyadenylation signal-dependent pathway, and the downstream sense transcripts are protected from premature cleavage by U1 small nuclear ribonucleoprotein (snRNP).
细胞如何确保来自不同启动子的有效转录仅限于下游的蛋白质编码区,这是转录领域的一个重要问题。最近发表在《自然》杂志上的一项研究提出了答案,该研究表明上游反义转录本通过多聚腺苷酸化信号依赖性途径进行早期终止,而下游的正义转录本则受到 U1 小核核糖核蛋白(snRNP)的保护,防止过早切割。