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Effects of a male meiotic driver on male and female transcriptomes in the house mouse

ABSTRACT: Effects of a male meiotic driver on male and female transcriptomes in the house mouse

PROVIDER: PRJNA577575 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR10277600_1.fastq.gz	Fastqsanger.gz
	SRR10277600_2.fastq.gz	Fastqsanger.gz
	SRR10277601_1.fastq.gz	Fastqsanger.gz
	SRR10277601_2.fastq.gz	Fastqsanger.gz
	SRR10277602_1.fastq.gz	Fastqsanger.gz

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Effects of a male meiotic driver on male and female transcriptomes in the house mouse

Project description:We investigated effects of the t haplotype in house mice, an autosomal male meiotic driver, on genome-wide gene expression patterns in males and females. We analysed gonads, liver and brain in adult sibling pairs differing in genotype, allowing us to identify t-associated differences in gene regulation. In testis, only 40% of differentially expressed genes mapped to the approximately 708 annotated genes comprising the t haplotype. Thus much of the activity of the t haplotype occurs in trans, and as up-regulation. Sperm maturation functions were enriched among both cis and trans acting t haplotype genes. Within the t haplotype, more down-regulation and differential exon usage was observed. In ovaries, liver, and brain, the majority of expression differences mapped to the t haplotype, and were largely independent of the differences seen in the testis. Overall, we found widespread transcriptional effects of this male meiotic driver in the house mouse genome.

2019-10-28 | GSE138839 | GEO

Effects of a male meiotic driver on male and female transcriptomes in the house mouse.

Project description:Not all genetic loci follow Mendel's rules, and the evolutionary consequences of this are not yet fully known. Genomic conflict involving multiple loci is a likely outcome, as restoration of Mendelian inheritance patterns will be selected for, and sexual conflict may also arise when sexes are differentially affected. Here, we investigate effects of the t haplotype, an autosomal male meiotic driver in house mice, on genome-wide gene expression patterns in males and females. We analysed gonads, liver and brain in adult same-sex sibling pairs differing in genotype, allowing us to identify t-associated differences in gene regulation. In testes, only 40% of differentially expressed genes mapped to the approximately 708 annotated genes comprising the t haplotype. Thus, much of the activity of the t haplotype occurs in trans, and as upregulation. Sperm maturation functions were enriched among both cis and trans acting t haplotype genes. Within the t haplotype, we observed more downregulation and differential exon usage. In ovaries, liver and brain, the majority of expression differences mapped to the t haplotype, and were largely independent of the differences seen in the testis. Overall, we found widespread transcriptional effects of this male meiotic driver in the house mouse genome.

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CFP1 safeguards male meiotic progression by regulating meiotic gene expression

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Project description:Male germ cells establish a unique heterochromatin domain, the XY-body, early in meiosis. How this domain is maintained through the end of meiosis and into post-meiotic germ cell differentiation is poorly understood. ADAD2 is a late meiotic male germ cell specific RNA binding protein, loss of which leads to post-meiotic germ cell defects. Analysis of ribosome association in Adad2 mutants revealed defective translation of Mdc1, a key regulator of XY-body formation, late in meiosis. As a result, Adad2 mutants show normal establishment but failed maintenance of the XY-body. Observed XY-body defects are concurrent with abnormal autosomal heterochromatin and ultimately lead to severely perturbed post-meiotic germ cell heterochromatin and cell death. These findings highlight the requirement of ADAD2 for Mdc1 translation, the role of MDC1 in maintaining meiotic male germ cell heterochromatin, and the importance of late meiotic heterochromatin for normal post-meiotic germ cell differentiation.

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Project description:Gamete formation from germline stem cells (GSCs) is essential for sexual reproduction. However, the regulation of GSC differentiation and meiotic entry are incompletely understood. Set2, which deposits H3K36me3 modifications, is required for differentiation of GSCs during Drosophila oogenesis. We discovered that the H3K36me3 reader Male-specific lethal 3 (MSL3) and the histone acetyltransferase complex Ada2a-containing (ATAC) cooperate with Set2 to regulate entry into meiosis in female Drosophila. MSL3 expression is restricted to the mitotic and early meiotic stages of the female germline, where it promotes transcription of genes encoding synaptonemal complex components and a germline enriched ribosomal protein S19 paralog, RpS19b. RpS19b upregulation is required for translation of Rbfox1, a known meiotic cell cycle entry factor. Thus, MSL3 is a master regulator of meiosis, coordinating the expression of factors required for recombination and GSC differentiation. We find that MSL3 is expressed during mouse spermatogenesis, suggesting a conserved function during meiosis.

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