Regulation of RNA Polymerase II transcription by the phosphatase Rtr1

Project: Research project

Description

DESCRIPTION (provided by applicant): Proper regulation of RNA Polymerase II (RNAPII) transcription is required for proper gene expression levels and the maintenance of overall genome stability. The regulation of RNAPII is altered in the pathogenesis of many human diseases including cancer, neurological disorders, and viral infection. In order to combat changes in RNAPII transcription during the course of disease progression, the basic mechanisms that underlie the regulation of RNAPII must be understood. We have identified a novel regulator of RNAPII, an atypical protein phosphatase known as Rtr1 that is conserved from yeast to humans. We have shown that Rtr1 is required for dephosphorylation of a specific serine in a conserved domain in RNAPII known as the CTD. However, the mechanisms that require CTD dephosphorylation during transcription are not understood. In order to determine the precise role of Rtr1 during RNAPII transcription, we will focus on three specific questions: (1) Is Rtr1-dependent CTD dephosphorylation required for recruitment of the mRNA 3' end processing machinery? (2) Does Rtr1-dependent dephosphorylation stimulate the release of phospho-CTD binding proteins? and (3) Does Rtr1 regulate the phosphorylation status of other protein complexes involved in the regulation of RNAPII transcription elongation and termination? By addressing these key questions, we will increase our understanding of the fundamental process of RNAPII transcription which will allow us to define how defects in this process cause human disease. PUBLIC HEALTH RELEVANCE: Changes in gene expression and genome stability are hallmarks of human diseases such as cancer. In multiple disease states, changes in gene expression and genome stability and caused by altered regulation of RNAPII gene transcription. Our work will identify novel regulatory mechanisms that are employed during RNAPII transcription that could serve as therapeutic targets for the treatment of human disease.
StatusFinished
Effective start/end date8/1/127/31/17

Funding

  • National Institutes of Health: $281,534.00
  • National Institutes of Health: $291,881.00
  • National Institutes of Health: $291,605.00
  • National Institutes of Health: $350,781.00
  • National Institutes of Health: $291,461.00
  • National Institutes of Health: $34,710.00

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RNA Polymerase II
Phosphoric Monoester Hydrolases
Genomic Instability
Phosphoprotein Phosphatases
Virus Diseases
Nervous System Diseases
Serine
Disease Progression
Gene Expression
Carrier Proteins
Yeasts
Maintenance
Phosphorylation
Messenger RNA

ASJC

  • Medicine(all)
  • Biochemistry, Genetics and Molecular Biology(all)