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BMAL1-TTK-H2Bub1 loop deficiency contributes to impaired BM-MSC-mediated bone formation in senile osteoporosis

ABSTRACT: BMAL1-TTK-H2Bub1 loop deficiency contributes to impaired BM-MSC-mediated bone formation in senile osteoporosis

PROVIDER: PRJNA865870 | ENA |

REPOSITORIES: ENA

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BMAL1-TTK-H2Bub1 loop deficiency contributes to impaired BM-MSC-mediated bone formation in senile osteoporosis

Project description:We performed multiomic high-throughput sequencing to recapitulated the BMAL1-H2Bub1 loop in mesenchymal stem cells osteogenesis. We used lentiviruses to diminish RNF40 and WAC, which are parts of the obligate complex and monoubiquitinated histone H2B, in MSCs, and analysed the H2Bub1 and PolII CUT&Tag-seq.

2022-08-06 | GSE210425 | GEO

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The H2Bub1-deposition complex is required for human and mouse cardiogenesis (RNA-Seq)

Project description:De novo variants affecting monoubiquitination of histone H2B (H2Bub1) are enriched in human congenital heart disease. H2Bub1 is required in stem cell differentiation, cilia function, post-natal cardiomyocyte maturation, and transcriptional elongation. However, how H2Bub1 affects cardiogenesis is unknown. We show that the H2Bub1-deposition complex (RNF20-RNF40-UBE2B) is required for mouse cardiogenesis and for differentiation of human iPSCs into cardiomyocytes. Mice with cardiac-specific Rnf20 deletion are embryonic lethal and have abnormal myocardium. We then analyzed H2Bub1 marks during differentiation of human iPSCs into cardiomyocytes. H2Bub1 is erased from most genes at transition from cardiac mesoderm to cardiac progenitor cells, but is preserved on a subset of long cardiac-specific genes. When H2Bub1 is reduced in iPSC-cardiomyocytes, long cardiac-specific genes have fewer full-length transcripts. This correlates with H2Bub1 accumulation near the center of these genes. H2Bub1 accumulation near the center of tissue-specific genes was also observed in embryonic fibroblasts and fetal osteoblasts. In summary, we show that normal H2Bub1 distribution is required for cardiogenesis and cardiomyocyte differentiation, and point to H2Bub1 regulating tissue-specific gene expression by increasing the amount of full-length transcripts.

2023-10-31 | GSE246411 | GEO

The H2Bub1-deposition complex is required for human and mouse cardiogenesis (ChIP-Seq)

2023-10-31 | GSE246410 | GEO

Cdk9 and H2Bub1 signal to Clr6-CII/Rpd3S to suppress aberrant antisense transcription

Project description:Histone H2B mono-ubiquitylation (H2Bub1) and phosphorylation of elongation factor Spt5 by cyclin-dependent kinase 9 (Cdk9) occur during transcription by RNA polymerase II (RNAPII), and are mutually dependent in fission yeast. How Cdk9 activity and H2Bub1 cooperate to regulate the expression of individual genes remains unclear. Here we show Cdk9 inhibition or H2Bub1 loss induces intragenic antisense transcription of distinct gene subsets; ablation of both pathways derepresses antisense transcription of over half the genome. H2Bub1 and phospho-Spt5 have similar genome-wide distributions; both are enriched in coding regions, and H2Bub1 levels are directly proportional to those of phospho-Spt5. Cdk9-dependence of antisense suppression correlates with high H2Bub1 occupancy, and with promoter-proximal RNAPII pausing. Combined reduction of Cdk9 activity and loss of H2Bub1 prevent recruitment of the histone deacetylase Clr6-CII to transcribed genes, and lead to decreased histone occupancy and increased histone acetylation within gene coding regions. These results uncover new pathways linking regulators of RNAPII transcription elongation to suppression of aberrant antisense transcription, and demonstrate novel interactions between co-transcriptional histone modification pathways.

2020-05-21 | GSE115682 | GEO

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