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Basis of gene-specific transcription regulation by the Integrator complex
Molecular Cell ( IF 14.5 ) Pub Date : 2024-06-20 , DOI: 10.1016/j.molcel.2024.05.027
Kevin Sabath 1 , Amena Nabih 1 , Christian Arnold 2 , Rim Moussa 2 , David Domjan 1 , Judith B Zaugg 2 , Stefanie Jonas 1
Affiliation  

The Integrator complex attenuates gene expression via the premature termination of RNA polymerase II (RNAP2) at promoter-proximal pausing sites. It is required for stimulus response, cell differentiation, and neurodevelopment, but how gene-specific and adaptive regulation by Integrator is achieved remains unclear. Here, we identify two sites on human Integrator subunits 13/14 that serve as binding hubs for sequence-specific transcription factors (TFs) and other transcription effector complexes. When Integrator is attached to paused RNAP2, these hubs are positioned upstream of the transcription bubble, consistent with simultaneous TF-promoter tethering. The TFs co-localize with Integrator genome-wide, increase Integrator abundance on target genes, and co-regulate responsive transcriptional programs. For instance, sensory cilia formation induced by glucose starvation depends on Integrator-TF contacts. Our data suggest TF-mediated promoter recruitment of Integrator as a widespread mechanism for targeted transcription regulation.

中文翻译:


整合复合体基因特异性转录调控的基础



Integrator 复合物通过在启动子近端暂停位点提前终止 RNA 聚合酶 II (RNAP2) 来减弱基因表达。它是刺激反应、细胞分化和神经发育所必需的,但 Integrator 如何实现基因特异性和适应性调节仍不清楚。在这里,我们确定了人类整合子亚基 13/14 上的两个位点,它们充当序列特异性转录因子 (TF) 和其他转录效应复合物的结合中心。当 Integrator 连接到暂停的 RNAP2 时,这些中枢位于转录气泡的上游,与同时 TF 启动子束缚一致。 TF 与 Integrator 在全基因组范围内共定位,增加靶基因上的 Integrator 丰度,并共同调节响应性转录程序。例如,葡萄糖饥饿诱导的感觉纤毛形成取决于 Integrator-TF 接触。我们的数据表明 TF 介导的启动子招募整合子是一种广泛的靶向转录调控机制。
更新日期:2024-06-20
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