HEИндивидуална стипендия2023–2025

RNAPII biogenesis · Regulating RNAPII levels: gaining insight into the translation, assembly and transport of RNAPII subunits.

„Хоризонт Европа“ — Действия „Мария Склодовска-Кюри“

Период: 2023-09-01 → 2025-09-30
Финансиране от ЕС: 214 934 €
Участници: 1
Схема: HORIZON-TMA-MSCA-PF-EF

Линиите свързват координатора с партньорите.

Накратко на български

РНК полимераза II е ензимът, който копира генетичната информация за създаване на протеини, като проектът проучва как се регулират нивата на неговата основна част (RPB1). Това помага да се разбере как човешките клетки контролират синтеза и транспорта на този важен комплекс.

Този кратък обзор е генериран от изкуствен интелект

Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.

Резултати накратко

Regulating RNAPII levels: gaining insight into the translation, assembly and transport of RNAPII subunits.

RNA polymerase II (RNAPII), the key enzyme responsible for the transcription of all protein-coding genes and many non-coding genes in eukaryotes. RNAPII is a heteromeric complex, consisting of twelve subunits (RPB1-RPB12). Emerging evidence from our lab, as well as from others, has suggested that the cellular abundance of RPB1 is tightly regulated in cells, and that it can act as a regulatory node for transcription. Nevertheless, the mechanisms involved in sensing and regulating RPB1 levels, and in extension RNAPII abundance, remained poorly understood. The objective of the project was therefore to gain more insight into how RNAPII levels are regulated in human cells. To this end, I had proposed three work packages that focused on different steps in the RNAPII biogenesis pathway, including synthesis of the RPB1 subunit synthesis, assembly of the entire RNAPII heteromeric complex, and its transport into the nucleus.

Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз

Цел на проекта

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.

Оригинален текст от CORDIS (на английски).

Участници

KOBENHAVNS UNIVERSITET · KOBENHAVNКоординаторДания