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A-type lamins bind both hetero- and euchromatin, the latter being regulated by lamina-associated polypeptide 2alpha

ABSTRACT: This SuperSeries is composed of the SubSeries listed below. Refer to individual Series

ORGANISM(S): Mus musculus

SUBMITTER: Philipp Rescheneder

PROVIDER: E-GEOD-70149 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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A-type lamins bind both hetero- and euchromatin, the latter being regulated by lamina-associated polypeptide 2alpha [gene expression]

Project description:Lamins are components of the peripheral nuclear lamina and interact with heterochromatic genomic regions, termed lamina-associated domains (LADs). In contrast to lamin B1, lamin A/C also localizes throughout the nucleus, where it associates with the chromatin-binding protein lamina-associated polypeptide (LAP) 2alpha. Here we show lamin A/C also interacts with euchromatin, as determined by chromatin immunoprecipitation analyses of eu- and heterochromatin-enriched samples. By way of contrast, lamin B1 was only found associated with heterochromatin. Euchromatic regions occupied by lamin A/C overlap with those bound by LAP2alpha, the depletion of which shifts binding of lamin A/C towards more heterochromatic regions. These alterations in lamin A/C chromatin interaction affect epigenetic histone marks in euchromatin without significantly affecting gene expression, while loss of lamin A/C in heterochromatic regions increased gene expression. Our data show a novel role of nucleoplasmic lamin A/C and LAP2alpha in regulating euchromatin. Examination of LaminA, LaminB and Lap2a DNA binding in Lap2alpha +/+ and Lap2a -/- cells and according changes in Histone modifications and gene expression

2016-01-19 | E-GEOD-70148 | biostudies-arrayexpress

A-type lamins bind both hetero- and euchromatin, the latter being regulated by lamina-associated polypeptide 2alpha [ChIP-Seq]

Project description:Lamins are components of the peripheral nuclear lamina and interact with heterochromatic genomic regions, termed lamina-associated domains (LADs). In contrast to Lamin B11, lamin A/C also localizes throughout the nucleus, where it associates with the chromatin-binding protein lamina-associated polypeptide (LAP) 2alpha. Here we show lamin A/C also interacts with euchromatin, as determined by chromatin immunoprecipitation analyses of eu- and heterochromatin-enriched samples. By way of contrast, Lamin B11 was only found associated with heterochromatin. Euchromatic regions occupied by lamin A/C overlap with those bound by LAP2alpha, the depletion of which shifts binding of lamin A/C towards more heterochromatic regions. These alterations in lamin A/C chromatin interaction affect epigenetic histone marks in euchromatin without significantly affecting gene expression, while loss of lamin A/C in heterochromatic regions increased gene expression. Our data show a novel role of nucleoplasmic lamin A/C and LAP2alpha in regulating euchromatin. Examination of Lamin A/C, Lamin B1 and Lap2a DNA binding in Lap2alpha +/+ and Lap2a -/- cells and according changes in Histone modifications and gene expression

2016-01-19 | E-GEOD-70147 | biostudies-arrayexpress

Ultra-high-density QTL markers mapping for seedling photomorphogenesis mediating Arabidopsis establishment in southern Patagonia

Project description:The intent of the experiment was to construct molecular SNP-binning markers of a Col-0 x Pat RIL population, for sensitive QTL mapping. We performed Illumina low-coverage DNA sequencing of plant tissues.

2021-07-21 | E-MTAB-10387 | biostudies-arrayexpress

A-type lamins bind both hetero- and euchromatin, the latter being regulated by lamina-associated polypeptide 2 alpha.

Project description:Lamins are components of the peripheral nuclear lamina and interact with heterochromatic genomic regions, termed lamina-associated domains (LADs). In contrast to lamin B1 being primarily present at the nuclear periphery, lamin A/C also localizes throughout the nucleus, where it associates with the chromatin-binding protein lamina-associated polypeptide (LAP) 2 alpha. Here, we show that lamin A/C also interacts with euchromatin, as determined by chromatin immunoprecipitation of euchromatin- and heterochromatin-enriched samples. By way of contrast, lamin B1 was only found associated with heterochromatin. Euchromatic regions occupied by lamin A/C overlap with those bound by LAP2alpha, and lack of LAP2alpha in LAP2alpha-deficient cells shifts binding of lamin A/C toward more heterochromatic regions. These alterations in lamin A/C-chromatin interactions correlate with changes in epigenetic histone marks in euchromatin but do not significantly affect gene expression. Loss of lamin A/C in heterochromatic regions in LAP2alpha-deficient cells, however, correlated with increased gene expression. Our data show a novel role of nucleoplasmic lamin A/C and LAP2alpha in regulating euchromatin.

| S-EPMC4817770 | biostudies-literature

A-type lamins bind both hetero- and euchromatin, the latter being regulated by lamina-associated polypeptide 2alpha

Project description:This SuperSeries is composed of the SubSeries listed below.

2016-01-19 | GSE70149 | GEO

A-type lamins bind both hetero- and euchromatin, the latter being regulated by lamina-associated polypeptide 2alpha [ChIP-Seq]

Project description:Lamins are components of the peripheral nuclear lamina and interact with heterochromatic genomic regions, termed lamina-associated domains (LADs). In contrast to Lamin B11, lamin A/C also localizes throughout the nucleus, where it associates with the chromatin-binding protein lamina-associated polypeptide (LAP) 2alpha. Here we show lamin A/C also interacts with euchromatin, as determined by chromatin immunoprecipitation analyses of eu- and heterochromatin-enriched samples. By way of contrast, Lamin B11 was only found associated with heterochromatin. Euchromatic regions occupied by lamin A/C overlap with those bound by LAP2alpha, the depletion of which shifts binding of lamin A/C towards more heterochromatic regions. These alterations in lamin A/C chromatin interaction affect epigenetic histone marks in euchromatin without significantly affecting gene expression, while loss of lamin A/C in heterochromatic regions increased gene expression. Our data show a novel role of nucleoplasmic lamin A/C and LAP2alpha in regulating euchromatin.

2016-01-19 | GSE70147 | GEO

A-type lamins bind both hetero- and euchromatin, the latter being regulated by lamina-associated polypeptide 2alpha [gene expression]

2016-01-19 | GSE70148 | GEO

Whole-genome bisulfite sequencing of the pituitary gland of male rats exposed to stress against unexposed controls

Project description:Environmental stressors such as repeated social defeat may trigger powerful activation of sub-conscious parts of the brain. We examine the consequences of such stress in male rats on the pituitary gland. We prepared 10 Sprague Dawley rats. 5 of them were exposed to stress induced by the resident-intruder paradigm while the other 5 were controls.After dislocation of the neck under isoflurane anaesthesia, the pituitary gland was harvested. To depict an initial epigenetic pituitary stress response, total DNA was isolated from the tissues and used for bisulfite DNA sequencing. This data presented here is a subset of the samples involved in E-MTAB-11285 RNA-seq project.

2022-08-03 | E-MTAB-11290 | biostudies-arrayexpress

RNA-seq of different Plodia interpunctella tissues for males and females

Project description:We sequenced mRNA of adult Plodia interpunctella males and females at 1 day after eclosion for the tissues/composite structures head, thorax, and gonads, as well as sexed 5th instar larvae heads. The purpose of the study was to compare overall gene expression patterns of the Z chromosome and the autosomes between males and females in order to assess the status of dosage compensation.

2017-07-19 | E-MTAB-5847 | biostudies-arrayexpress

CRISPR enhancer scan to detect critical elements for the regulation of EVI1 in a translocated enhancer

Project description:To uncover, in an unbiased fashion, which elements of the 18 kb translocated region control EVI1 transcription, we devised a CRISPR/Cas9-based enhancer scanning approach. We considered all possible sgRNA target sites containing a canonical Cas9 PAM site (NGG) on both strands of the minimal 18 kb translocated region. Deep-sequencing libraries were generated by PCR amplification of sgRNA guide strands using primers that tag the product with standard Illumina adapters and a 4 bp sample barcode in a 2 step-PCR protocol.

2021-07-26 | E-MTAB-9948 | biostudies-arrayexpress

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