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Owenia Genome Project

ABSTRACT: The genome of the early-branching annelid Owenia fusiformis

PROVIDER: PRJEB38497 | ENA |

REPOSITORIES: ENA

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			Action	DRS
		Other
	CAIIXF02.dat.gz	Other
	CAIIXF02.fasta.gz	Fasta.gz
	CAIIXF02.master.dat	Other
	ERR10504274_1.fastq.gz	Fastqsanger.gz

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Owenia fusiformis

Project description:Owenia fusiformis

| PRJNA294141 | ENA

Owenia fusiformis

Project description:Owenia fusiformis overview

| PRJNA306383 | ENA

The developmental transcriptome and epigenome of Owenia fusiformis reveal the development and evolution of mitraria larvae

Project description:Owenia fusiformis has a unique mitraria larvae form which is different to other marine spiralians. we utilize RNA-seq and ATAC-seq to profile the gene expression and chromatin accessibility to understand their development and evolution.

2022-05-04 | GSE184126 | GEO

The developmental transcriptome and epigenome of Owenia fusiformis reveal the development and evolution of mitraria larvae [dataset2]

2022-11-16 | GSE202283 | GEO

The adult tissue transcriptome of Owenia fusiformis

Project description:Owenia fusiformis is an ancestral sister group to the annelids, it has a unique "head larvae" type named mitraria larvae. To identify the gene expressed in different tissues, especially the gene expressed in head region, we dissected the 5 female worms and 1 male worm to get 9 different tissues, and extracted their RNA. The sequencing were performed on BGISEQ-500 platform, and the mapping were done with Kallisto and normalization was performed with DEseq2.

2022-11-16 | GSE210813 | GEO

The adult tissue transcriptome of Owenia fusiformis

Project description:The adult tissue transcriptome of Owenia fusiformis

| PRJNA867679 | ENA

Owenia

Project description:Owenia sp. overview

| PRJNA291456 | ENA

ERK1/2-RNAseq_Owenia

Project description:The role of ERK1/2 during spiral cleavage in the annelid Owenia fusiformis

| PRJEB47195 | ENA

Owenia sp. SA-2015 strain:A5908

Project description:Owenia sp transcriptome

| PRJNA282841 | ENA

Annelid methylomes reveal ancestral developmental and ageing-associated epigenetic erosion across Bilateria

Project description:Background DNA methylation in the form of 5-methylcytosine (5mC) is the most abundant base modification in animals. However, 5mC levels vary widely across taxa. Whilst vertebrate genomes are hypermethylated, in most invertebrates, 5mC concentrates on constantly and highly transcribed genes (gene body methylation; GbM) and, in some species, on transposable elements (TEs), a pattern known as ‘mosaic’. Yet, the role and developmental dynamics of 5mC and how these explain interspecific differences in DNA methylation patterns remain poorly understood, especially in Spiralia, a large clade of invertebrates comprising nearly half of the animal phyla. Results Here, we generate base-resolution methylomes for three species with distinct genomic features and phylogenetic positions in Annelida, a major spiralian phylum. All possible 5mC patterns occur in annelids, from typical invertebrate intermediate levels in a mosaic distribution to hypermethylation and methylation loss. GbM is common to annelids with 5mC, and methylation differences across species are explained by taxon-specific transcriptional dynamics or the presence of intronic TEs. Notably, the link between GbM and transcription decays during development, alongside a gradual and global, age-dependent demethylation in adult stages. Additionally, reducing 5mC levels with cytidine analogues during early development impairs normal embryogenesis and reactivates TEs in the annelid Owenia fusiformis. Conclusions Our study indicates that global epigenetic erosion during development and ageing is an ancestral feature of bilateral animals. However, the tight link between transcription and gene body methylation is likely more important in early embryonic stages, and 5mC-mediated TE silencing probably emerged convergently across animal lineages.

2024-06-30 | GSE250187 | GEO

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