Inside a cell’s nucleus, proteins and genetic material are clumping together into droplet-like clusters that behave like liquids turning to solids—and no one yet knows exactly why. This project tackles a fundamental gap in biology: how these newly discovered nuclear clusters relate to transcription, the process by which cells read DNA to make proteins. Transcription is essential for every cell to function, but many of its details remain mysterious. The clusters appear to involve proteins that regulate transcription, and similar protein clumping is a hallmark of neurodegenerative diseases like Alzheimer’s. Yet the mechanisms linking the two phenomena are unknown. The research is curiosity-driven fundamental science with no immediate practical application. It brings together physicists, biologists, and mathematicians to combine advanced microscopy, modelling, and molecular biology—approaches that rarely work side by side. If successful, it could explain how cells organise their genetic activity in space and time. That deeper understanding might eventually open new angles for treating diseases where transcription or protein clustering goes wrong, but the project’s primary goal is to answer a basic question about how living cells work.
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This project aims at connecting via an interdisciplinary approach two phenomena that are of fundamental importance in biology and medicine. The first one is transcription, the production of messenger-RNAs (mRNAs) from genes on the DNA. mRNAs are used by cells to make proteins, the main components for function and growth of cells. Understanding function and regulation of transcription is therefore of critical importance for comprehensive insights into cellular function in health and disease. Yet, many aspects of transcription remain unclear and are challenging to study due to the contributions of the second phenomenon we want to study, the dynamical turnover of a certain type of 'clusters' in the nucleus of a cell. This clustering appears to involve various different proteins, many of which are implicated in transcriptional regulation, and possibly includes DNA and mRNA. This phenomenon was discovered only recently and appears to relate to the regulation of transcription, although mechanistic details are elusive. Apart from its role in transcription, clustering of proteins is a hallmark of neurogenerative diseases, which mandates a better understanding of its functional purposes. While research in transcription is a biological venture, studying clustering requires a physics approach; the clusters form relatively large structures in the nuclei, which are akin to phase changes that are seen when a liquid substance becomes solid or vice versa. This results in unique biophysical properties within the clusters that are not amenable to biology-based research strategies. Our goal in this project is to form an interdisciplinary team of physicists, biologists, and mathematicians to investigate the nature of the interactions between clusters and transcription. This provides a chance to explain and unify these two phenomena in a mechanistic sense, along with prospects to include and thus understand many other unexplained biological observations. The biological side of our team will provide expertise and methodology for investigating transcription and its dynamics and for locating important proteins on and alongside DNA and mRNAs. The physicists will investigate the properties of the clusters and their interactions with other objects in the cells' nuclei using advanced microscopic imaging techniques and modelling approaches, with input from mathematicians. The different strands of work in the project will be very strongly integrated to maximize the interdisciplinary exchange and facilitate the emergence of novel insights. The project will significantly advance our understanding of fundamental processes in human biology, with the associated strong medical implications. It will also contribute to the creation of long-term collaborative arrangements between researchers in different disciplines.
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