Pierre-Étienne Jacques

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Although emerging evidence suggests that transposable elements (TEs) have contributed novel regulatory elements to the human genome, their global impact on transcriptional networks remains largely uncharacterized. Here we show that TEs have contributed to the human genome nearly half of its active elements. Using DNase I hypersensitivity data sets from(More)
Hyperekplexia (startle disease) results from mutations in the glycine receptor chloride channel that disrupt inhibitory synaptic transmission. The Q266H missense mutation is the only hyperekplexia mutation located in the transmembrane domains of the receptor. Using recombinant expression and patch-clamping techniques, we have investigated the functional(More)
Molecular mechanisms of zinc potentiation were investigated in recombinant human alpha1 glycine receptors (GlyRs) by whole-cell patch-clamp recording and [3H]strychnine binding assays. In the wild-type (WT) GlyR, 1 microM zinc enhanced the apparent binding affinity of the agonists glycine and taurine and reduced their concentrations required for(More)
Four discontinuous extracellular sequence domains have been proposed to form the ligand binding sites of the ligand-gated ion channel receptor superfamily. In this study, we investigated the role of 12 contiguous residues of the inhibitory glycine receptor that define the proposed "loop A" ligand binding domain. Using the techniques of site-directed(More)
In animals, replication-coupled histone H3.1 can be distinguished from replication-independent histone H3.3. H3.3 variants are enriched at active genes and their promoters. Furthermore, H3.3 is specifically incorporated upon gene activation. Histone H3 variants evolved independently in plants and animals, and it is unclear whether different(More)
Integrative and conjugative elements (ICEs) of the SXT/R391 family have been recognized as key drivers of antibiotic resistance dissemination in the seventh-pandemic lineage of Vibrio cholerae. SXT/R391 ICEs propagate by conjugation and integrate site-specifically into the chromosome of a wide range of environmental and clinical Gammaproteobacteria.(More)
A role for variant histone H2A.Z in gene expression is now well established but little is known about the mechanisms by which it operates. Using a combination of ChIP-chip, knockdown and expression profiling experiments, we show that upon gene induction, human H2A.Z associates with gene promoters and helps in recruiting the transcriptional machinery.(More)
Gastric cancer is the second highest cause of global cancer mortality. To explore the complete repertoire of somatic alterations in gastric cancer, we combined massively parallel short read and DNA paired-end tag sequencing to present the first whole-genome analysis of two gastric adenocarcinomas, one with chromosomal instability and the other with(More)
UNLABELLED MtbRegList is a database dedicated to the analysis of gene expression and regulation data in Mycobacterium tuberculosis. It is designed to contain predicted and characterized regulatory DNA motifs cross-referenced with corresponding transcription factor(s), and experimentally identified transcription start sites. MtbRegList can also handle(More)
Histone deacetylase Rpd3 is part of two distinct complexes: the large (Rpd3L) and small (Rpd3S) complexes. While Rpd3L targets specific promoters for gene repression, Rpd3S is recruited to ORFs to deacetylate histones in the wake of RNA polymerase II, to prevent cryptic initiation within genes. Methylation of histone H3 at lysine 36 by the Set2(More)