Context-dependent epigenome rewiring during neuronal differentiation
Manelli, V.; Diwakar, J.; Beskardes, S.; Alonso-Gil, D.; Forne, I.; Chong, F.; Imhof, A.; Bonev, B.
Show abstract
Transcription factors (TFs) are pivotal in orchestrating lineage decisions and their binding is often accompanied by chromatin remodeling. However, a comprehensive understanding of how cellular and epigenetic contexts influence TF binding and the subsequent activation of lineage-specific programs remains lacking. Here, we dissected the molecular mechanisms underlying the binding of one such TF - Neurog2 and its functional consequences in two cell-types: mouse embryonic stem cells and neural progenitor cells. Our findings reveal that cell-type-specific chromatin accessibility and motif syntax are key determinants for TF binding. While Neurog2 binding primarily leads to chromatin opening, DNA demethylation and increased chromatin interactions, we also uncovered strong indirect, cell-type-specific effects, which ultimately result in vastly different epigenetic landscape. Furthermore, we identify shared and cell-type-specific Neurog2 interactors, including the SWI/SNF and NuRD complexes. Our study shed light on how cellular environment can modulate TF function to establish lineage identity during development.
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