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Molecular basis of neuronal subtype bias introduced by proneural factors Ascl1 and Neurog2

ABSTRACT: This SuperSeries is composed of the SubSeries listed below.

ORGANISM(S): Mus musculus

PROVIDER: GSE114176 | GEO | 2019/02/27

REPOSITORIES: GEO

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Molecular basis of neuronal subtype bias introduced by proneural factors Ascl1 and Neurog2 (RNA-seq)

Project description:Basic helix-loop-helix (bHLH) proneural transcription factors (TFs) Ascl1 and Neurog2 are integral to the development of the nervous system. Here, we investigated the molecular mechanisms by which Ascl1 and Neurog2 control the acquisition of generic neuronal fate and impose neuronal subtype identity. Using direct neuronal programming of embryonic stem cells, we found that Ascl1 and Neurog2 regulate distinct targets by binding to largely different sets of sites. Their divergent binding pattern is not determined by the previous chromatin state but distinguished by specific E-box enrichments which reflect the DNA sequence preference of the bHLH domain. The divergent Ascl1 and Neurog2 binding patterns result in distinct chromatin accessibility and enhancer activity landscapes that shape the binding and activity of downstream TFs during neuronal specification. Our findings suggest that proneural factors contribute to neuronal diversity by differentially altering the chromatin landscapes that shape the binding of neuronally expressed TFs.

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Molecular basis of neuronal subtype bias introduced by proneural factors Ascl1 and Neurog2 (ChIP-seq)

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Molecular basis of neuronal subtype bias introduced by proneural factors Ascl1 and Neurog2 (ATAC-seq)

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Molecular basis of neuronal subtype bias introduced by proneural factors Ascl1 and Neurog2

Project description:Molecular basis of neuronal subtype bias introduced by proneural factors Ascl1 and Neurog2

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Proneural factors Ascl1 and Neurog2 contribute to neuronal subtype identities by establishing distinct chromatin landscapes.

Project description:Developmental programs that generate the astonishing neuronal diversity of the nervous system are not completely understood and thus present a major challenge for clinical applications of guided cell differentiation strategies. Using direct neuronal programming of embryonic stem cells, we found that two main vertebrate proneural factors, Ascl1 and neurogenin 2 (Neurog2), induce different neuronal fates by binding to largely different sets of genomic sites. Their divergent binding patterns are not determined by the previous chromatin state, but are distinguished by enrichment of specific E-box sequences that reflect the binding preferences of the DNA-binding domains. The divergent Ascl1 and Neurog2 binding patterns result in distinct chromatin accessibility and enhancer activity profiles that differentially shape the binding of downstream transcription factors during neuronal differentiation. This study provides a mechanistic understanding of how transcription factors constrain terminal cell fates, and it delineates the importance of choosing the right proneural factor in neuronal reprogramming strategies.

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Molecular basis of neuronal subtype bias introduced by proneural factors Ascl1 and Neurog2 (ATAC-seq)

Project description:Molecular basis of neuronal subtype bias introduced by proneural factors Ascl1 and Neurog2 (ATAC-seq)

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Molecular basis of neuronal subtype bias introduced by proneural factors Ascl1 and Neurog2 (ChIP-seq)

Project description:Molecular basis of neuronal subtype bias introduced by proneural factors Ascl1 and Neurog2 (ChIP-seq)

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Molecular basis of neuronal subtype bias introduced by proneural factors Ascl1 and Neurog2 (RNA-seq)

Project description:Molecular basis of neuronal subtype bias introduced by proneural factors Ascl1 and Neurog2 (RNA-seq)

| PRJNA467529 | ENA

Molecular basis of neuronal subtype bias introduced by proneural factors Ascl1 and Neurog2 (single-cell RNA-seq)

Project description:Molecular basis of neuronal subtype bias introduced by proneural factors Ascl1 and Neurog2 (single-cell RNA-seq)