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Metabolomics,Unknown,Transcriptomics,Genomics,Proteomics

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FOXK2 ChIP-chip

ABSTRACT: Chromatin immunoprecipitation of FOXK2 (tagged with Flag and His tags) in U2OS cells detected by Affymetrix human promoter array 1.0R.

ORGANISM(S): Homo sapiens

SUBMITTER: Leo Zeef

PROVIDER: E-MEXP-3116 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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The forkhead transcription factor FOXK2 promotes AP-1-mediated transcriptional regulation.

Ji Zongling Z Donaldson Ian J IJ Liu Jingru J Hayes Andrew A Zeef Leo A H LA Sharrocks Andrew D AD

Molecular and cellular biology 20111114 2

The transcriptional control circuitry in eukaryotic cells is complex and is orchestrated by combinatorially acting transcription factors. Forkhead transcription factors often function in concert with heterotypic transcription factors to specify distinct transcriptional programs. Here, we demonstrate that FOXK2 participates in combinatorial transcriptional control with the AP-1 transcription factor. FOXK2 binding regions are widespread throughout the genome and are often coassociated with AP-1 bi ...[more]

PMID: 22083952

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FOXK2 ChIP-seq

Project description:Chromatin immunoprecipitation of FOXK2 (tagged with Flag and His tags) in U2OS cells detected by SOLiD sequencing. ***Correction March 2014: The sample “FOXK2_Dox_treated” has been renamed, it was originally named “FOXK2_rep2”. A new sample “FOXK2_rep2” has been added, with new files. It has come to our attention that one of the FOXK2 ChIP-seq replicates 'FOXK2_rep2' that we used in our paper recent paper (Ji, Z., Donaldson, I.J., Liu, J., Hayes, A., Zeef, L.A.H. and Sharrocks, A.D. (2012) The forkhead transcription factor FOXK2 promotes AP-1-mediated transcriptional regulation. Mol. Cell. Biol. 32, 385-398. doi:10.1128/MCB.05504-11) was incorrect. The replicate was actually treated with doxorubicin prior to ChIP-seq analysis resulting in the loss of many FOXK2 binding events.***

2011-01-20 | E-MTAB-565 | biostudies-arrayexpress

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Project description:A unique signature of neuronal transcriptomes is the high expression of the longest genes in the genome (e.g. >100 kilobases). These genes encode proteins with essential functions in neuronal physiology, and disruption of long gene expression has been implicated in neurological disorders. DNA topoisomerases resolve topological constraints that arise on DNA and facilitate the expression of long genes in neurons. Conversely, methyl-CpG binding protein 2 (MeCP2), which is disrupted in Rett syndrome, can act as a transcriptional repressor to downregulate the expression of long genes. The molecular mechanisms underlying the regulation of long genes by these factors are not fully understood, however, and whether or not they directly influence each other is not known. Here, we identify a functional interaction between MeCP2 and Topoisomerase II-beta (TOP2β) in neurons. We show that MeCP2 and TOP2β physically interact in vivo and map protein sequences sufficient for their physical interaction in vitro. We profile TOP2β activity genome-wide in neurons and detect enrichment at regulatory regions and gene bodies of long neuronal genes, including long genes regulated by MeCP2. Further, we find that knockdown and overexpression of MeCP2 leads to altered TOP2β activity at MeCP2-regulated genes. Our findings uncover a mechanism by which MeCP2 inhibits the activity of TOP2β at long genes in neurons and suggest that this mechanism is disrupted in neurodevelopment disorders caused by mutation of MeCP2.

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