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Enrichment of H3K9me2 on unsynapsed chromatin in C. elegans does not target de novo sites

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

ORGANISM(S): Caenorhabditis elegans

SUBMITTER: Eleanor Maine

PROVIDER: E-GEOD-67030 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Enrichment of H3K9me2 on Unsynapsed Chromatin in Caenorhabditis elegans Does Not Target de Novo Sites.

Guo Yiqing Y Yang Bing B Li Yini Y Xu Xia X Maine Eleanor M EM

G3 (Bethesda, Md.) 20150708 9

Many organisms alter the chromatin state of unsynapsed chromosomes during meiotic prophase, a phenomenon hypothesized to function in maintaining germline integrity. In Caenorhabditis elegans, histone H3 lysine 9 dimethylation (H3K9me2) is detected by immunolabeling as enriched on unsynapsed meiotic chromosomes. Loss of the SET domain protein, MET-2, greatly reduces H3K9me2 abundance and results in germline mortality. Here, we used him-8 mutations to disable X chromosome synapsis and performed a ...[more]

PMID: 26156747

Similar Datasets

Enrichment of H3K9me2 on unsynapsed chromatin in C. elegans does not target de novo sites [ChIP-Seq]

Project description:Characterization of the H3K9me2 distribution in the C. elegans adult hermaphrodite genome using ChIP-Seq Examination of H3K9me2 in two different nematode strains: fer-1 control and fer-1;him-8 mutant, where the X chromosomes are unsynapsed. The fer-1 mutation prevents production of embryos.

2015-09-04 | E-GEOD-67028 | biostudies-arrayexpress

Enrichment of H3K9me2 on unsynapsed chromatin in C. elegans does not target de novo sites [RNA-Seq]

Project description:We sequenced mRNA isolated from adult hermaphrodite met-2;him-8 and him-8 gonads in order to determine the gene expression profile of germ cells with or without H3K9me2. Examination of mRNA profiles in nematode gonad of met-2;him-8 (without H3K9me2) and him-8 (with H3K9me2)

2015-09-04 | E-GEOD-67029 | biostudies-arrayexpress

A new dataset of spermatogenic vs oogenic transcriptomes in the nematode C. elegans

Project description:The nematode Caenorhabditis elegans is an important model for studies of germ cell biology, including specification as sperm or oocyte, the meiotic cell cycle and gamete differentiation. Fundamental to those studies is a genome-level knowledge of the germline transcriptome. Here we use RNA-Seq to identify genes expressed in isolated XX gonads, which are roughly 95% germline and 5% somatic gonadal tissue. We generate data from mutants making either sperm [fem-3(q96)] or oocytes (fog-2), both grown at 22M-BM-0C. Our dataset identifies a total of 10,754 mRNAs in the polyadenylated transcriptome of XX gonads, with 1,723 enriched in spermatogenic gonads, 2,869 enriched in oogenic gonads and the remaining 6,274 not enriched in either. These spermatogenic, oogenic and gender-neutral gene datasets compare well with those of earlier studies, but double the number of genes identified. We also query our RNA-Seq data for differential exon usage and find 351 mRNAs with sex-specific isoforms. We suggest that this new dataset will prove useful for studies focusing on C. elegans germ cell biology. Comparison of spermatogenic vs oogenic transcriptomes

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RNA-seq of whole body L2 females, L2 hermaphrodites, L2 converted females (hermaphrodite-fated larvae induced to develop as females), adult males and mixed stages individuals from the three-sexed nematode Auanema rhodensis

Project description:The nematode Auanema rhodensis is trioecious (co-occurrence of males, females and self-fertile hermaphrodites). To better understand its sex determination system, we have compared the transcriptomic profiles of early (L2) females, hermaphrodites and converted females (hermaphrodite-fated larvae induced to develop as females). Additionally, we sequenced the transcriptome of adult males and individuals from various stages and sexes (mixed stages samples) to compare global gene expression profiles along the assembled draft chromosomes of A. rhodensis (BioProject PRJEB29492). The RNA-seq data was also used to predict genes in the assembled genome. We generated three biological replicates for each RNA-seq condition (L2 females, L2 converted females, L2 hermaphrodites, males and mixed stages). Comparisons of the expression profiles of the L2 conditions was performed to identify genes potentially involved in the sexual differentiation process, using a standard RNA-seq comparison approach. Briefly, the cleaned reads were aligned to the genome using STAR, the abundance and identification of differentially expressed genes were assessed using FeatureCounts and DEseq2 (using as thresholds an absolute log2(Fold Change) >= 2 and an FDR <0.01).

2019-02-11 | E-MTAB-7667 | biostudies-arrayexpress

Enrichment of H3K9me2 on Unsynapsed Chromatin in Caenorhabditis elegans Does Not Target de Novo Sites.

Project description:Many organisms alter the chromatin state of unsynapsed chromosomes during meiotic prophase, a phenomenon hypothesized to function in maintaining germline integrity. In Caenorhabditis elegans, histone H3 lysine 9 dimethylation (H3K9me2) is detected by immunolabeling as enriched on unsynapsed meiotic chromosomes. Loss of the SET domain protein, MET-2, greatly reduces H3K9me2 abundance and results in germline mortality. Here, we used him-8 mutations to disable X chromosome synapsis and performed a combination of molecular assays to map the sites of H3K9me2 accumulation, evaluate H3K9me2 abundance in germline vs. whole animals, and evaluate the impact of H3K9me2 loss on the germline transcriptome. Our data indicate that H3K9me2 is elevated broadly across the X chromosome and at defined X chromosomal sites in him-8 adults compared with controls. H3K9me2 levels are also elevated to a lesser degree at sites on synapsed chromosomes in him-8 adults compared with controls. These results suggest that MET-2 activity is elevated in him-8 mutants generally as well as targeted preferentially to the unsynapsed X. Abundance of H3K9me2 and other histone H3 modifications is low in germline chromatin compared with whole animals, which may facilitate genome reprogramming during gametogenesis. Loss of H3K9me2 has a subtle impact on the him-8 germline transcriptome, suggesting H3K9me2 may not be a major regulator of developmental gene expression in C. elegans. We hypothesize H3K9me2 may have a structural function critical for germline immortality, and a greater abundance of these marks may be required when a chromosome does not synapse.

| S-EPMC4555223 | biostudies-literature

RNA-seq of mice genital ridges from males and females at embryonic days E11 and E12

Project description:The aim of the study was to identify differentially expressed genes, isoforms and AS modifications accompanying Gonadal Sex Determination in mice. We performed a Rna-Seq analysis of XX and XY gonads during sex determination on embryonic days 11 (E11) and 12 (E12). RNA-seq libraries were prepared from grouped gonads from E11 and E12 males and females. The cDNA libraries were sequenced using a HiSeq2500 v4 chemistry system

2019-02-21 | E-MTAB-7656 | biostudies-arrayexpress

3'UTR sequencing of C.elegans strains

Project description:3'UTR sequencing was performed in indicated C.elegans strains to obtain information about alterations in 3'UTR lengths and alternative polyadenylation events.

2021-09-03 | E-MTAB-9147 | biostudies-arrayexpress

P. pacificus and C. elegans exposed to various pathogens

Project description:This SuperSeries is composed of the following subset Series: GSE36413 : C. elegans young adults : Exposed to Bacillus thuringiensis DB27 vs. E. coli OP50 exposure; 4hours GSE36493: C. elegans young adults: Exposed to Staphylococcus aureus versus exposed to E. coli OP50 : 4 hours GSE36499: C. elegans young adults: Exposed to Serratia marcescens versus exposed to E. coli OP50 : 4 hours GSE36501: C. elegans young adults: Exposed to Xenorhabdus nematophila versus exposed to E. coli OP50 : 4 hours GSE36517: P. pacificus young adults: Exposed to Bacillus thuringiensis DB27 versus exposed to E. coli OP50 : 4 hours GSE36519: P. pacificus young adults: Exposed to Staphylococcus aureus versus exposed to E. coli OP50 : 4 hours GSE36521: P. pacificus young adults: Exposed to Serratia marcescens versus exposed to E. coli OP50 : 4 hours GSE36523: P. pacificus young adults: Exposed to Xenorhabdus nematophila versus exposed to E. coli OP50 : 4 hours Refer to individual Series

2012-03-20 | E-GEOD-36636 | biostudies-arrayexpress

Global genetic robustness of the alternative splicing machinery in C. elegans

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2011-01-01 | E-GEOD-15778 | biostudies-arrayexpress

Purification and transcriptomic analysis of mouse fetal Leydig cells reveals candidate genes for disorders of sex development

Project description:To examine the transcriptome of early testicular somatic cells during gonadogenesis at 12.5dpc RNA sequencing (RNA-Seq) was performed on murine primary testicular cell lineages isolated from the Sf1-eGFP line by FACS. The three main somatic cell lineages of the testis were isolated: the Sertoli cells which direct male development; the fetal Leydig cells (FLCs) that produce steroid hormones and virilise the XY individual and a heterogenous population of interstitial cells, some of which give rise to the adult Leydig cells (ALCs). This dataset provides a platform for exploring the biology of FLCs and understanding the role of these cells in testicular development and masculinization of the embryo, and a basis for targeted studies designed to identify causes of idiopathic XY DSD. RNA-Seq of 3 enriched cell populations from 12.5dpc mouse gonad (Sertoli cells, Leydig cells and Interstitial cells isolated by FACS-sorting) on an Illumina HiSeq 1500, in triplicate.

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