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A combinatorial view of old and new RNA polymerase II modifications

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TLDR
This work focuses on integrating newly identified and lesser-studied CTD post-translational modifications into the existing framework and reviews the growing body of work demonstrating crosstalk between different CTD modifications and the functional consequences of such crosStalk on the dynamics of transcriptional regulation.
Abstract
The production of mRNA is a dynamic process that is highly regulated by reversible post-translational modifications of the C-terminal domain (CTD) of RNA polymerase II. The CTD is a highly repetitive domain consisting mostly of the consensus heptad sequence Tyr1-Ser2-Pro3-Thr4-Ser5-Pro6-Ser7. Phosphorylation of serine residues within this repeat sequence is well studied, but modifications of all residues have been described. Here, we focus on integrating newly identified and lesser-studied CTD post-translational modifications into the existing framework. We also review the growing body of work demonstrating crosstalk between different CTD modifications and the functional consequences of such crosstalk on the dynamics of transcriptional regulation.

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Citations
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Journal ArticleDOI

Functional organization of RNA polymerase II in nuclear subcompartments.

TL;DR: In this paper , different ways of assembling the active RNA polymerase II transcriptional machinery relate to nuclear compartmentalization, and the concept of proteins and RNA phase-separating into liquid-like droplets was proposed to drive the formation of transcriptionally active subcompartments.
Journal ArticleDOI

What's all the phos about? Insights into the phosphorylation state of the RNA polymerase II C-terminal domain via mass spectrometry.

TL;DR: The development of various MS techniques are discussed and the pros and cons of each technique are highlighted to provide future investigators with a comprehensive overview of how MS can be used to investigate the complexities of RNAP-II mediated transcription.
Journal ArticleDOI

Control of non-productive RNA polymerase II transcription via its early termination in metazoans

TL;DR: In this article , the authors summarize current knowledge of how and when such promoter-proximal quality control is asserted on metazoan RNA polymerase II (Pol II) complexes.
Journal ArticleDOI

Control of non-productive RNA polymerase II transcription via its early termination in metazoans.

TL;DR: Current knowledge is summarized of how and when promoter-proximal quality control is asserted on metazoan Pol II, which is often followed by rapid degradation of the associated RNA.
Journal ArticleDOI

Transcription and chromatin-based surveillance mechanism controls suppression of cryptic antisense transcription.

TL;DR: In this paper, the histone deacetylase activity of the fission yeast Hos2/Set3 complex plays an important role in suppressing cryptic initiation of antisense transcription when RNA polymerase II phosphorylation is dysregulated due to the loss of Ssu72 phosphatase.
References
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Journal ArticleDOI

Translating the Histone Code

TL;DR: It is proposed that this epigenetic marking system represents a fundamental regulatory mechanism that has an impact on most, if not all, chromatin-templated processes, with far-reaching consequences for cell fate decisions and both normal and pathological development.
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Nascent RNA Sequencing Reveals Widespread Pausing and Divergent Initiation at Human Promoters

TL;DR: Global run-on sequencing, GRO-seq, shows that peaks of promoter-proximal polymerase reside on ∼30% of human genes, transcription extends beyond pre-messenger RNA 3′ cleavage, and antisense transcription is prevalent.
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c-Myc regulates transcriptional pause release.

TL;DR: It is reported that promoter-proximal pausing is a general feature of transcription by Pol II in mammalian cells and thus an additional step where regulation of gene expression occurs, and that the transcription factor c-Myc, a key regulator of cellular proliferation, plays a major role in Pol II pause release.
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Different phosphorylated forms of RNA polymerase II and associated mRNA processing factors during transcription

TL;DR: A dynamic association of mRNA processing factors with differently modified forms of the polymerase throughout the transcription cycle is suggested.
Journal ArticleDOI

Controlling the Elongation Phase of Transcription with P-TEFb

TL;DR: Phylogenetic analyses of the components of the human elongation control machinery indicate that the number of mechanisms utilized to regulate P-TEFb function increased as organisms developed more complex developmental patterns.
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