Project description
Unravelling the origins of cell differentiation in animals
Cell differentiation is a key aspect of development, where cells acquire specific identities and functions by activating distinct gene expression programmes. This process is essential for forming the diverse cell types in multicellular organisms. In choanoflagellates, the closest relatives of animals, cell differentiation is temporal, with cells transitioning between identities without committing to specific fates. The ERC-funded OriCellDiff project aims to delineate the underlying mechanism of this temporal cell differentiation, focusing on chromatin-based transcriptional regulation. Using genome-wide omics, the research team will assess histone modifications, the cis-regulatory landscape, and the potential role of enhancer elements to gain insights into the evolution of animal gene regulation during development.
Objective
During animal development the process of cell differentiation gives rise to terminally differentiated cell types with cell-type-specific gene expression programs. In the most closely related group to animals, the choanoflagellates, cell differentiation occurs but cells do not commit irreversibly to specific fates. Instead, they transition through cell identities as they progress through their life cycle, known as temporal cell differentiation. Animal cell differentiation is thought to have evolved from temporal differentiation, but the mechanisms are largely unknown due to a lack of information on the molecular processes underpinning temporal differentiation.
This proposal will test the hypothesis that chromatin-based transcriptional regulation underlies temporal cell differentiation in choanoflagellates. Utilizing S. rosetta as a model, I will compare transcription and chromatin across cell types using genome-wide omics techniques. This will allow me to assess the role of different histone modifications in cell-fate transitions and discover whether various aspects of animal developmental gene regulation, e.g. the use of repressive histone modifications in cell-type-specific gene regulation, are also utilised in choanoflagellates. I will also examine the cis-regulatory landscape in S. rosetta and use both molecular and functional assays to examine the types of cis-regulatory elements present, and particularly if enhancer elements are used to regulate gene expression. Finally, I will test the role of selected chromatin regulators in temporal cell differentiation and cell-type-specific gene expression.
This ground-breaking work will be the first to study these processes in choanoflagellates, thus pioneering the comparison between definitive cell differentiation, seen in animals, and choanoflagellate temporal differentiation. In a broader context, this will deliver fundamental new insights into the evolution of animal gene-regulation during development.
Keywords
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)
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
-
HORIZON.1.1 - European Research Council (ERC)
MAIN PROGRAMME
See all projects funded under this programme
Topic(s)
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Funding Scheme
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
HORIZON-ERC - HORIZON ERC Grants
See all projects funded under this funding scheme
Call for proposal
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
(opens in new window) ERC-2023-STG
See all projects funded under this callHost institution
Net EU financial contribution. The sum of money that the participant receives, deducted by the EU contribution to its linked third party. It considers the distribution of the EU financial contribution between direct beneficiaries of the project and other types of participants, like third-party participants.
H91 Galway
Ireland
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.