Unknown,Transcriptomics,Genomics,Proteomics

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Genomic Study of RNA Polymerase II and III SNAPc-Bound Promoters Reveals a Gene Transcribed by both Enzymes and a Broad Use of Common Activators

ABSTRACT: SNAPc-dependent promoters are unique among cellular promoters in being very similar to each other, even though some of them recruit RNA polymerase II and other RNA polymerase III. We have examined all SNAPc-bound promoters present in the human genome. We find that there is a surprisingly small number of them, some 70 promoters. Among these, the large majority is bound by either RNA polymerase II or RNA polymerase III, as expected, but one gene hitherto considered an RNA polymerase III gene is also occupied by significant levels of RNA polymerase II, which synthesizes an RNA distinct from that synthesized by RNA polymerase III. Both RNA polymerase II and RNA polymerase III SNAPc- dependent promoters use a largely overlapping set of a few transcription activators, including GABP, a novel factor implicated in snRNA gene transcription. SNAPc-dependent promoters in the human genome

ORGANISM(S): Homo sapiens

SUBMITTER: Viviane Praz

PROVIDER: E-GEOD-38303 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Genomic study of RNA polymerase II and III SNAPc-bound promoters reveals a gene transcribed by both enzymes and a broad use of common activators.

James Faresse Nicole N Canella Donatella D Praz Viviane V Michaud Joëlle J Romascano David D Hernandez Nouria N

PLoS genetics 20121115 11

SNAP(c) is one of a few basal transcription factors used by both RNA polymerase (pol) II and pol III. To define the set of active SNAP(c)-dependent promoters in human cells, we have localized genome-wide four SNAP(c) subunits, GTF2B (TFIIB), BRF2, pol II, and pol III. Among some seventy loci occupied by SNAP(c) and other factors, including pol II snRNA genes, pol III genes with type 3 promoters, and a few un-annotated loci, most are primarily occupied by either pol II and GTF2B, or pol III and B ...[more]

PMID: 23166507

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Project description:Analysis of transcriptional regulation in human cells has implicated a large number of promoter-specific DNA-binding proteins that regulate transcription via diverse mechanisms. In some cases, these DNA-sequence-specific factors associate with intermediaries that orchestrate interactions with the chromatin-modifying enzymes. One such intermediary is HCF-1 (host-cell factor-1; HCFC1). HCF-1, first identified for its involvement in herpes-simplex virus transcription and subsequently shown to be an important cell-cycle regulator, has a poorly defined role in genome-wide transcriptional regulation. We show here, by chromatin immunoprecipitation followed by high-throughput sequence analysis (ChIP-seq), that HCF-1 is a major transcriptional start site associated factor, whose promoter association correlates positively with transcriptional activity. Thus, in HeLa cells HCF-1 is observed on 5400 generally active CpG-island promoters. Examination of the DNA sequences underlying the HCF-1-binding sites revealed three sequence motifs associated with the binding of (i) ZNF143 and Ronin/THAP11, (ii) GABP, and (iii) YY1 sequence-specific transcription factors. Subsequent ChIP-seq analysis of these four transcription factors revealed a large co-association of HCF-1 with these four transcription factors at approximately 90% of HCF-1-bound promoters. These studies suggest that a relatively small number of transcription factors -- some (ZNF143 and Ronin/THAP11) in novel combinations -- play a major role in HeLa-cell transcriptional regulation in association with HCF-1. This experiment includes the sequencing data of material obtained from chromatin immunoprecipitation using antibodies against HCFC1(antibodies against the C-subunit and the N-subunit), PolII(antibody against the RPB2 subunit), H3K36ME3 and H3K4Me3 histone modifications, ZNF143, THAP11, GABPalpha and YY1. It also includes control data of the Input material. All of them were done using HeLa cycling cells.

Dataset Information

Genomic Study of RNA Polymerase II and III SNAPc-Bound Promoters Reveals a Gene Transcribed by both Enzymes and a Broad Use of Common Activators

Publications

Genomic study of RNA polymerase II and III SNAPc-bound promoters reveals a gene transcribed by both enzymes and a broad use of common activators.

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