Variations of Polycomb assembly in mouse embryonic stem cells and early differentiation
Polycomb repressive complex (PRC)1 and 2 are major players in gene regulation, devoted to maintenance of the epigenetic memory of gene silencing. Mouse embryonic stem cells (mESCs) have been extensively exploited as a model system to study Polycomb complexes composition and function, leading to the...
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| Formato: | tesis doctoral |
| Estado: | Versión publicada |
| Fecha de publicación: | 2022 |
| País: | España |
| Recursos: | CBUC, CESCA |
| Repositorio: | TDR. Tesis Doctorales en Red |
| OAI Identifier: | oai:www.tdx.cat:10803/673953 |
| Acesso em linha: | http://hdl.handle.net/10803/673953 |
| Access Level: | acceso abierto |
| Palavra-chave: | Epigenetics Chromatin Polycomb Pluripotency Development Llave Epigenética Cromatina Pluripotència Desarrollo 575 |
| Resumo: | Polycomb repressive complex (PRC)1 and 2 are major players in gene regulation, devoted to maintenance of the epigenetic memory of gene silencing. Mouse embryonic stem cells (mESCs) have been extensively exploited as a model system to study Polycomb complexes composition and function, leading to the identification of many accessory factors. However, the mechanisms regulating PRC1/2 composition in mESCs are still poorly understood. Moreover, several reports have shown that changes in composition occur upon cell differentiation, although little is known about the functional relevance of these changes. In this doctoral thesis I aim to address these questions by focusing on two examples of these aspects: first, I characterize the PRC1 interactome upon mESCs differentiation to primitive endoderm (PrE) and try to assess its role in this cell fate transition. Secondly, I report the identification of a novel splicing isoform of PRC2 core component Suz12, with implications in PRC2 composition and activity on chromatin |
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