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The MOF-containing NSL complex associates globally with housekeeping genes, but activates only a defined subset (RNAi)

ABSTRACT: The MOF-containing NSL complex binds to many but not all promoters of active genes and potentially contributes to their proper gene expression. It is currently unknown what determines whether an active gene is bound or not. Here, we provide evidence that the NSL complex primarily targets active promoters of most housekeeping genes. There, it co-localizes with the chromatin remodeler NURF and the histone methyltransferase Trithorax. Moreover, despite binding to most housekeeping genes, the NSL complex regulates only a subset of them, which are depleted for certain insulator binding-proteins and enriched for the core promoter motif “Ohler 5”. We suggest that the combination of general chromatin factors and core promoter motifs is predictive for whether a housekeeping gene is transcriptionally regulated by the NSL complex.

ORGANISM(S): Drosophila melanogaster

PROVIDER: GSE30990 | GEO | 2011/10/29

SECONDARY ACCESSION(S): PRJNA154631

REPOSITORIES: GEO

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The MOF-containing NSL complex associates globally with housekeeping genes, but activates only a defined subset (RNAi)

Project description:The MOF-containing NSL complex binds to many but not all promoters of active genes and potentially contributes to their proper gene expression. It is currently unknown what determines whether an active gene is bound or not. Here, we provide evidence that the NSL complex primarily targets active promoters of most housekeeping genes. There, it co-localizes with the chromatin remodeler NURF and the histone methyltransferase Trithorax. Moreover, despite binding to most housekeeping genes, the NSL complex regulates only a subset of them, which are depleted for certain insulator binding-proteins and enriched for the core promoter motif “Ohler 5”. We suggest that the combination of general chromatin factors and core promoter motifs is predictive for whether a housekeeping gene is transcriptionally regulated by the NSL complex. Transcriptome expression profiling comparing NSL1 RNAi-depleted cells with control RNAi cells using Affymetrix microarrays.

2011-10-28 | E-GEOD-30990 | biostudies-arrayexpress

The MOF-containing NSL complex associates globally with housekeeping genes, but activates only a defined subset (ChIP)

Project description:The MOF-containing NSL complex binds to many but not all promoters of active genes and potentially contributes to their proper gene expression. It is currently unknown what determines whether an active gene is bound or not. Here, we provide evidence that the NSL complex primarily targets active promoters of most housekeeping genes. There, it co-localizes with the chromatin remodeler NURF and the histone methyltransferase Trithorax. Moreover, despite binding to most housekeeping genes, the NSL complex regulates only a subset of them, which are depleted for certain insulator binding-proteins and enriched for the core promoter motif “Ohler 5”. We suggest that the combination of general chromatin factors and core promoter motifs is predictive for whether a housekeeping gene is transcriptionally regulated by the NSL complex. ChIP-chip profiling of NSL1 in adult male and female whole fly extracts and the embryonically derived male S2 cell line.

2011-10-28 | E-GEOD-30989 | biostudies-arrayexpress

The MOF-containing NSL complex associates globally with housekeeping genes, but activates only a defined subset (ChIP)

2011-10-29 | GSE30989 | GEO

The MOF-containing NSL complex associates globally with housekeeping genes, but activates only a defined subset

Project description:This SuperSeries is composed of the following subset Series: GSE30989: MOF-containing NSL complex specifically binds promoters of most, but stimulates only a specific subset of, housekeeping genes (ChIP-chip dataset) GSE30990: MOF-containing NSL complex specifically binds promoters of most, but stimulates only a specific subset of, housekeeping genes (expression dataset) Refer to individual Series

2011-10-28 | E-GEOD-30991 | biostudies-arrayexpress

The NSL complex–mediated nucleosome landscape is required to maintain transcription fidelity and suppression of transcription noise

Project description:We report that the Drosophila Non-Specific Lethal (NSL) complex is necessary to maintain this stereotypical nucleosomal organization at promoters. Upon NSL1 depletion, nucleosomes invade the NDRs at TSSs of NSL-bound genes. NSL complex member NSL3 binds to TATA-less promoters in a sequence-dependent manner. We showed that the NSL complex is necessary and sufficient to recruit NURF chromatin remodeling complex to target promoters. The NSL complex is not only essential for transcription but is required for accurate TSS selection for genes with multiple TSSs. Further, loss of NSL complex leads to an increase in transcriptional noise. Thus, the NSL complex establishes a canonical nucleosomal organization that enables transcription and determines TSS fidelity.

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ChIP-seq of MOF, MSL and NSL complex members in mouse ES cells and neuronal progenitors

Project description:We assessed the genome-wide binding of the histone acetylase MOF and members of its two associated complexes, the male-specific lethal and the non-specific lethal complex (MSL, NSL). We generated ChIP-seq profiles for MOF, MSL1, MSL2, KANSL3, and MCRS1 from mouse embryonic stem cells and neuronal progenitor cells. By using two replicates per sample and stringent filtering criteria, we identify five basic groups of genome regions where the proteins show either mutual or exclusive binding. We find that the NSL complex members (KANSL3, MCRS1) target the TSSs of broadly expressed genes with housekeeping functions in both cell types. MOF and particularly the MSL complex target a subset of these NSL-complex-targets, too. In addition, we find several thousand TSS-distal binding sites, particularly in ESCs, where KANSL3, MSL2 and MCRS1 show strong enrichments for annotated ESC enhancers. The vast majority of the binding to these ESC distal regulatory elements is lost in NPCs. Finally, we identify mostly intronic and intergenic regions with predominant MSL2 enrichments without the presence of its known interactors. These binding sites do not overlap with ESC marks of active chromatin (e.g. DNase hypersensitivity sites), but the they increase in number upon differentiation and we detect a strong signature of the (CAGA)n motif. Our study provides the first comprehensive analysis of MOF in the context of its two complexes in the mouse and reveals shared as well as distinct and dynamic functions for gene regulation and pluripotency. ChIP-seq of MOF and members of its associated complexes (MSL complex: MSL1, MSL2; NSL complex: KANSL3, MCRS1) in male mouse embryonic stem cells and neuronal progenitor cells derived from them.

2014-06-03 | E-GEOD-51746 | biostudies-arrayexpress

Enhancer-core promoter specificity separates developmental and housekeeping regulation

Project description:Gene transcription in animals involves the assembly of the RNA polymerase II complex at core promoters and its cell type-specific activation by genomic enhancers that can be located more distally. However, how ubiquitous expression of housekeeping genes is achieved has remained less clear. In particular, it is unknown whether ubiquitously active enhancers exist and how developmental and housekeeping gene regulation is separated. An attractive hypothesis is that different types of core promoters might exhibit an intrinsic specificity towards certain types of enhancers. Here, we show that thousands of enhancers in D. melanogaster S2 cells and ovarian somatic cells (OSCs) exhibit a marked specificity towards one of two core promoters M-bM-^@M-^S one derived from a ubiquitously expressed ribosomal protein gene and another from a developmentally regulated transcription factor. Enhancers that activate the housekeeping core promoter are functional across the two different cell types, while developmental enhancers exhibit strong cell type specificity. Both enhancer classes differ in their overall genomic distribution, the functions of neighbouring genes,these genesM-bM-^@M-^Y core promoter elements, as well as the associated factors. Our results provide evidence for a sequence-encoded enhancer-core promoter specificity that separates developmental and housekeeping gene regulatory programs for thousands of enhancers and their target genes across the entire genome. STARR-seq was performed in S2 and OSC cells using two core promoters each representing housekeeping and developmental transcription programs. Data for housekeeping promoters (hkCP) are presented in this series; Data for developmental core promoters (dCP) samples are presented in GSE40739.

2014-12-10 | E-GEOD-57876 | biostudies-arrayexpress

ChIP-seq profiling of RNA Polymerase II in Drosophila melanogaster S2 cells depleted of the non-specific lethal (NSL) complex

Project description:We show that the non-specific lethal (NSL) complex in Drosophila binds to housekeeping genes. Individual ChIP-qPCR experiments of NSL target genes indicated a role of the NSL complex in RNA Polymerase II (Pol II) recruitment to promoters. Consequently, we obtained ChIP-Seq profiles of the Pol-II-subunit Rbp3 in S2 cells that were depleted of either NSL1 or NSL3. Rbp3-ChIP from S2 cells treated with siRNA targeted against GFP were used as a control. This experiment is related to experiment E-MTAB-214 and E-MTAB-1085.

2012-06-19 | E-MTAB-1084 | biostudies-arrayexpress

Methyl-lysine readers PHF20 and PHF20L1 define two distinct NSL complexes

Project description:The methyl lysine readers PHF (plant homeodomain finger) 20 (PHF20) and its homolog PHF20 Like 1 (PHF20L1) are known components of the NSL (non-specific lethal) complex that regulates gene expression through its histone acetyltransferase activity. In the current model, both PHF homologs coexist in the same NSL complex although this was not formally tested; nor have the functions of PHF20 and PHF20L1 regarding NSL complex integrity and transcriptional regulation been investigated. Here we perform an in-depth biochemical and functional characterization of PHF20 and PHF20L1 in the context of the NSL complex. We identify the existence of two distinct NSL complexes that exclusively contain either PHF20 or PHF20L1; the two PHF homologs do not complex together in the same NSL species. Our data show that the C-terminal domains are essential for PHF20 and PHF20L1 to complex with NSL and the Tudor 2 domains of PHF20 and PHF20L1 are required for chromatin binding. The genome-wide landscape of PHF20/PHF20L1 binding to chromatin shows that they bind mostly to the same genomic regions, at promoters of highly expressed/housekeeping genes. Yet, deletion of PHF20 and PHF20L1 does not abrogate gene expression of the identified targets or impact the recruitment of NSL to the promoters of those genes, suggesting the existence of an alternative mechanism that compensates for the transcription of genes whose sustained expression is important for critical cellular functions.

2022-03-02 | GSE188601 | GEO

ChIP-seq of MOF, MSL and NSL complex members in mouse ES cells and neuronal progenitors

2014-06-03 | GSE51746 | GEO