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SUMOylation of zebrafish transcription factor Zbtb21 affects its transcription activitym

ABSTRACT: SUMOylation of zebrafish transcription factor Zbtb21 affects its transcription activitym

PROVIDER: PRJNA1076555 | ENA |

REPOSITORIES: ENA

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SUMOylation of zebrafish transcription factor Zbtb21 affects its transcription activitym [ChIP-Seq]

Project description:SUMOylation of zebrafish transcription factor Zbtb21 affects its transcription activitym [ChIP-Seq]

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SUMOylation of zebrafish transcription factor Zbtb21 affects its transcription activity [RNA-Seq]

Project description:SUMOylation of zebrafish transcription factor Zbtb21 affects its transcription activity [RNA-Seq]

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SUMOylation of zebrafish transcription factor Zbtb21 affects its transcription activitym [ChIP-Seq]

Project description:Phylogenetically conserved lysines 419 and 845 of zebrafish Zbtb21 protein can be conjugated with SUMO molecules. SUMOylation does not affect the subcellular localization and protein stability of Zbtb21, as well as the interaction with Zbtb14 or Zbtb21. Nevertheless, luciferase reporter assays revealed that Zbtb21 is a dual-function transcription factor which exerts activation or repression effect on different promoters, and SUMOylation can modulate the transcriptional activity of Zbtb21 in regulating downstream target genes. Hence, Zbtb21 is identified as a novel substrate of SUMOylation, which would be important for its function.

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SUMOylation controls the neurodevelopmental function of the transcription factor Zbtb20

Project description:SUMOylation is a dynamic post-translational protein modification that primarily takes place in cell nuclei, where it plays a key role in multiple DNA-related processes. In brain cells, and particularly in neurons, mostly nuclear proteins are SUMOylated, and the SUMOylation-dependent control of a subset of neuronal transcription factors is known to regulate various aspects of nerve cell differentiation, development, and function. In an unbiased screen for endogenous SUMOylation targets in the developing mouse brain, we previously identified the transcription factor Zbtb20 as a new SUMO1 conjugate. We show here that the three key SUMO paralogues SUMO1, SUMO2, and SUMO3 can all be conjugated to Zbtb20 in vitro, and we confirm the SUMOylation of Zbtb20 in vivo. Using primary hippocampal neurons as a model system, we then demonstrate that the expression of Zbtb20 is required for proper nerve cell development and neurite growth and branching. Furthermore, we show that the SUMOylation of Zbtb20 is essential for Zbtb20 function in this context, and provide evidence indicating that SUMOylation affects the Zbtb20-dependent transcriptional profile of neurons. Taken together, our data highlight the role of SUMOylation in the regulation of neuronal transcription factors that determine nerve cell development. Specifically, our data demonstrate that key functions of the transcription factor Zbtb20 in neuronal development and neurite growth are under the obligatory control of SUMOylation.

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Project description:Genome wide localization of SUMO1 and SUMO2/3 proteins revealed an asscociation of SUMO proetins with active chromatin. SUMO proteins are enriched at super enhancers and enhancers and SUMOylation regulates a subset of these super enhancers. Super enhancers regulated by SUMOylation were enriched for transcription factor TFAP2C and SUMOylation negatively regulates TFAP2C localization to enhancers and super enhancers. Proteomics and ChIP-PCR at MYC SE suggests that chromatin bound TFAP2C recruits histone deacetylation complexes that increases upon SAE2 knockdown. Conversely, SUMOylation promoted TFAP2C asscociation with pre-mRNA splicing machinery components. Taken together, our study revealed a critical role of SUMOylation in chromatin modification through an AP-2 family of transcription factor, TFAP2C and a potential role of TFAP2C in pre-mRNA splicing.

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SUMOylation of zebrafish transcription factor Zbtb21 affects its transcription activitym

Project description:This SuperSeries is composed of the SubSeries listed below.

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