Transcriptomics

Dataset Information

4

Expression data from Control and HIRA knockdown cells


ABSTRACT: The HIRA chaperone complex, comprised of HIRA, UBN1 and CABIN1, collaborates with histone-binding protein ASF1a to incorporate histone variant H3.3 into chromatin in a DNA replication-independent manner. To better understand its function and mechanism, we integrated HIRA, UBN1, ASF1a and histone H3.3 ChIP-seq and gene expression analyses. Most HIRA-binding sites co-localize with UBN1, ASF1a and H3.3 at active promoters and active and weak/poised enhancers. At promoters, binding of HIRA/UBN1/ASF1a correlates with the level of gene expression. HIRA is required for deposition of histone H3.3 at its binding sites. There are marked differences in nucleosome and co-regulator composition at different classes of HIRA-bound regulatory site. Underscoring this, we report novel physical interactions between the HIRA complex and transcription factors, a chromatin insulator and an ATP-dependent chromatin-remodelling complex. Our results map the distribution of the HIRA chaperone across the chromatin landscape and point to different interacting partners at functionally distinct regulatory sites. We used microarrays to detail the global programme of gene expression after knockdown of HIRA HeLa cells were nucleofacted with Dharmacon control siRNA and siRNA to HIRA and RNA was isolated 72 hours after transfection in four biological replicates

ORGANISM(S): Homo sapiens  

SUBMITTER: Tony McBryan   Peter D Adams  Taranjit S Rai 

PROVIDER: E-GEOD-45022 | ArrayExpress | 2013-04-18

SECONDARY ACCESSION(S): GSE45022PRJNA192850

REPOSITORIES: GEO, ArrayExpress

Dataset's files

Source:
Action DRS
E-GEOD-45022.idf.txt Idf
E-GEOD-45022.processed.1.zip Processed
E-GEOD-45022.raw.1.zip Raw
E-GEOD-45022.sdrf.txt Txt
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