Project description
Dissecting RNA polymerase biogenesis
The human genome contains approximately 20 000 protein-coding genes. These are transcribed into mRNA by the RNA polymerase II (RNAPII) enzyme, a multiprotein complex that consists of 12 subunits. As such, RNAPII regulation and assembly are critical for correct gene expression. Funded by the Marie Skłodowska-Curie Actions programme, the RNAPII biogenesis project will investigate enzyme abundance, transport and time of assembly, offering a holistic view of RNAPII biogenesis. Researchers will investigate whether the subunits of RNAPII in eukaryotic cells assemble co-translationally. Collectively, the RNAPII biogenesis work will fuel future research into its potential exploitation as an anticancer target.
Objective
Cellular diversity in eukaryotic organisms is obtained through differential regulation of transcription, which is therefore a heavily studied step in gene expression. Protein-coding genes are transcribed by RNA polymerase II (RNAPII), an enzyme consisting of twelve subunits. Recently, work from my host lab, the Svejstrup lab, has suggested that depleting the number of fully assembled RNAPII molecules in the cell, through degradation of its main catalytic subunit RPB1, is crucial for achieving transcription recovery after DNA damage. This finding underscores the importance of understanding how RNAPII levels are regulated. Therefore, in this proposal I aim to gain insight into the mechanisms influencing RNAPII abundance, by studying RPB1 mRNA and protein levels, RNAPII assembly, and RNAPII transport in human cells. Specifically, I will leverage my background in RNA biology and bioinformatics analysis to identify RNA-binding proteins interacting with the 3’UTR of RPB1, and study their role in regulating RPB1 mRNA turnover and translation efficiency. Moreover, using state-of-the-art selective ribosomal profiling techniques, I will determine whether RNAPII is assembled co-translationally, as was recently proposed to be the mechanism of assembly for most multi-subunit complexes in eukaryotes. Finally, I will perform a CRISPR-Cas9 screen to identify novel factors that mediate RNAPII nuclear import. Together, this proposal will elucidate the biogenesis of RNAPII, which is crucial for a better understanding of transcription regulation. The proposed experiments will enhance my postdoctoral training by broadening my conceptual and technical skills and will provide data and tools to start my own laboratory in the future. Ultimately, these findings might also have therapeutic implications, as RNAPII is one of the targets being investigated for cancer treatments.
Fields of science
Programme(s)
- HORIZON.1.2 - Marie Skłodowska-Curie Actions (MSCA) Main Programme
Funding Scheme
MSCA-PF - MSCA-PFCoordinator
1165 Kobenhavn
Denmark