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Tdrd6a recruits Ziwi-bound piRNAs and coordinates deposition of germ plasm mRNAs into primordial germ cells

ABSTRACT: Tdrd6a recruits Ziwi-bound piRNAs and coordinates deposition of germ plasm mRNAs into primordial germ cells

PROVIDER: PRJNA315403 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR3231260_1.fastq.gz	Fastqsanger.gz
	SRR3231260_2.fastq.gz	Fastqsanger.gz
	SRR3231270_1.fastq.gz	Fastqsanger.gz
	SRR3231270_2.fastq.gz	Fastqsanger.gz
	SRR3231280_1.fastq.gz	Fastqsanger.gz

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Tdrd6a recruits Ziwi-bound piRNAs and coordinates deposition of germ plasm mRNAs into primordial germ cells [small RNA]

Project description:Tdrd6a recruits Ziwi-bound piRNAs and coordinates deposition of germ plasm mRNAs into primordial germ cells [small RNA]

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Tdrd6a recruits Ziwi-bound piRNAs and coordinates deposition of germ plasm mRNAs into primordial germ cells [small RNA]

Project description:Germ plasm, the Balbiani body and nuage are evolutionary conserved structures essential for germ cell specification and maintenance. We describe Tdrd6a as a component of these structures with two distinct molecular functions. First, Tdrd6a facilitates the accumulation of the typical antisense-bias of piRNAs, without having effects on piRNA biogenesis signatures. Second, we show that Tdrd6a is required for Balbiani body and germ plasm integrity, and associates with RNA-binding proteins and germ plasm mRNAs. On the cell-biological level, maternally contributed Tdrd6a strongly impacts germ cell formation, but is dispensable for fertility. Using single-cell RNA-sequencing we demonstrate that Tdrd6a promotes early germ cell development and regulates the stoichiometry of germ plasm mRNAs. We propose that Tdrd6a functions as a scaffold to recruit correct ratios of germ plasm transcripts and to accumulate antisense piRNA complexes in order to ensure both specification and maintenance of germ cells.

2018-07-24 | GSE107682 | GEO

Tdrd6a recruits Ziwi-bound piRNAs and coordinates deposition of germ plasm mRNAs into primordial germ cells [scRNA-Seq]

2018-07-24 | GSE79283 | GEO

Tdrd6a recruits Ziwi-bound piRNAs and coordinates deposition of germ plasm mRNAs into primordial germ cells [RIP-Seq]

2018-07-24 | GSE79161 | GEO

Danio rerio

Project description:Tdrd6a recruits Ziwi-bound piRNAs and coordinates deposition of germ plasm mRNAs into primordial germ cells [scRNA-Seq]

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Project description:Tdrd6a recruits Ziwi-bound piRNAs and coordinates deposition of germ plasm mRNAs into primordial germ cells [RIP-Seq]

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ATAC-seq of zebrafish primordial germ cells and somatic cells during early embryogenesis

Project description:Zebrafish Primordial Germ Cells (PGCs) were tracked in the Tg(Buc-GFP) line where the germ plasm protein Buc is fused to GFP. GFP-positive cells were isolated via FACS and RNA-seq was performed on polyadenylated transcripts for PGCs and somatic cells at 256-cell, high, dome, 10 somites and prim-5 stages. Two hundred cells were used for each biological replicate.

2020-12-24 | E-MTAB-8741 | biostudies-arrayexpress

RNA-seq of zebrafish primordial germ cells and somatic cells during early embryogenesis

2020-12-24 | E-MTAB-8707 | biostudies-arrayexpress

The Xenopus Primordial Germ Cell Transcriptome: Unexpected Role for sox7 in Early PGC Development

Project description:Xenopus primordial germ cells (PGCs) are determined by the presence of maternally derived germ plasm. Germ plasm components both protect PGCs from somatic differentiation and begin a unique gene expression program. Segregation of the germline from the endodermal lineage occurs during gastrulation and PGCs subsequently initiate zygotic transcription. However, the gene-networks that operate to both preserve the potential for totipotency and promote germline differentiation are poorly understood. Here, we utilized RNA-sequencing analysis to comprehensively interrogate PGC and neighboring endoderm cell RNAs after lineage segregation. We identified 1,865 transcripts enriched in PGCs compared to endoderm cells. Over 50% of maternal, vegetally-enriched transcripts were enriched in the PGC transcriptome, including sox7. PGC-directed sox7 knockdown and over-expression studies revealed an early requirement for sox7 in proper germ plasm localization, zygotic transcription, and PGC number. We identified oct60 as the most highly expressed and enriched OCT3/4 homologue in PGCs. Lastly, we compared the Xenopus PGC transcriptome with human PGC transcripts and showed that 80% of transcripts are conserved, identifying Xenopus as a relevant model system for understanding the gene-networks necessary for human germline development.

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Rbm24 dictates mRNA recruitment for germ plasm assembly

Project description:Ribonucleoprotein (RNP) granules are the most common membrane-less biomolecular condensates. However, the mechanisms underlying their assembly are largely unknown. The aggregation of germ plasm determines the fate of primordial germ cells (PGCs) and serves as a model for RNP granule assembly. Here, we show that maternal RNA binding protein Rbm24a is the key factor governing specific sorting of mRNAs. Mechanistically, Rbm24a complexes with Buc and interacts to dictate the specific grasp of germ plasm mRNAs into phase-separated condensates. Germ plasm particles lacking Rbm24a and mRNAs fail to undergo kinesin-dependent transport towards the cleavage furrows where small granules fuse into large aggregates. Therefore, the loss of maternal Rbm24a causes a complete degradation of germ plasm and the disappearance of PGCs. These findings demonstrate that Rbm24a functions as a nucleating organizer of the germ plasm, highlighting an emerging mechanism for RNA-binding proteins in reading and recruiting RNA components into the phase-separated protein scaffold.

2024-10-27 | GSE279756 | GEO

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