Project description
Gene expression regulation: the role of RNA cleavage
For a gene to be translated into protein, the intermediate messenger RNA must be correctly processed. This involves the process of 3’ end cleavage and polyadenylation, which facilitate exit from the nucleus, as well as the production of different isoforms, endowing multicellular organisms with spatial and temporal gene expression diversity. Scientists of the AlternativeEnds project, funded by the European Research Council, are interested to understand the underlying mechanism implicated in RNA cleavage and termination. Project activities will provide fundamental insight into alternative gene expression and offer the possibility of manipulating cleavage site selection for therapeutic purposes.
Objective
The human genome contains only ~20.000 genes, however, most of them encode multiple transcripts resulting from alternative promoter usage, splicing, and 3’ end selection. Gene 3’ ends can be defined by the positions of RNA 3’ cleavage, or the location where RNA polymerase II terminates transcription. Alternative 3’ ends determine the properties of the encoded protein: typically its abundance, but sometimes also domain structure – as for immunoglobulin M heavy chain which is membrane-bound or secreted depending on the 3’ cleavage site. Widespread changes in 3’ end usage are characteristic of many processes e.g. differentiation and cancer like neuroblastoma. We do not understand what drives this selectivity.
In this research project I will answer the fundamental question of how the location and timing of RNA polymerase II entering into termination mode impacts on the choice of the alternative cleavage and polyadenylation site (Aim 1). I will use biochemical and genetic approaches to elucidate the sequence determinant of alternative cleavage and termination (Aim 2), and investigate sequence-independent components of alternative termination (Aim 3).
I recently pioneered the measurement of 3’ cleavage positions together with locations of transcription termination by a novel transcriptomic method. I will apply this method to investigate the timing of changes in cleavage and termination relative to each other on an averaged cell population level, and use a new technique to test this for single molecules. I will also determine the baseline for cleavage site selection utilizing a newly developed in vitro system. Combining those unique integrative and separation-of-function approaches will yield a comprehensive view of alternative gene end regulation.
Ultimately, understanding the complex crosstalk between RNA cleavage and transcription termination in alternative 3’ end selection will enable the manipulation of this process e.g. to alleviate diseases such as neuroblastoma.
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
- natural sciences biological sciences biochemistry biomolecules proteins
- medical and health sciences clinical medicine oncology
- natural sciences biological sciences genetics RNA
- natural sciences biological sciences genetics genomes
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Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Programme(s)
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Multi-annual funding programmes that define the EU’s priorities for research and innovation.
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HORIZON.1.1 - European Research Council (ERC)
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(opens in new window) ERC-2021-STG
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61 712 Poznan
Poland
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