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E-GEOD-22073

ABSTRACT: Testis samples from Alkbh1 wild-type and KO mice

OTHER RELATED OMICS DATASETS IN: PRJNA128951PRJNA158427

PROVIDER: E-GEOD-22073 | ExpressionAtlas | 2015-09-15

REPOSITORIES: ExpressionAtlas

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			Action	DRS
	E-GEOD-22073-analysis-methods.tsv	Tabular
	E-GEOD-22073-atlasExperimentSummary.Rdata	Rdata
	E-GEOD-22073-configuration.xml	Xml
	E-GEOD-22073-percentile-ranks.tsv	Tabular
	E-GEOD-22073.condensed-sdrf.tsv	Tabular

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Mus musculus

Project description:Testis samples from Alkbh1 wild-type and KO mice

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Taf7l cooperates with Trf2 to regulate spermiogenesis

Project description:Taf7l (a paralogue of Taf7) and Trf2 (a TBP-related protein) are components of the core promoter complex required for gene/tissue-specific transcription of protein-coding genes by RNA polymerase II. Previous studies reported that Taf7l knockout mice exhibit structurally abnormal sperm, reduced sperm count, weakened motility and compromised fertility. Here we find that continued backcrossing of Taf7l-/Y mice from N5 to N9 produced KO males that are essentially sterile. Genome-wide expression profiling by mRNA-seq analysis of wild type (WT) and Taf7l-/Y (KO) testes revealed that Taf7l ablation impairs the expression of many post-meiotic spermatogenic specific as well as metabolic genes. Importantly, histological analysis of testes revealed that Taf7l-/Y mice develop post-meiotic arrest at the first stage of spermiogenesis, phenotypically similar to Trf2-/- mice, but distinct from Taf4b-/- mice. Indeed, we find that Taf7l and Trf2 co-regulate post-meiotic genes, but none of Taf4b-regulated germ stem cell genes in testes. Genome-wide ChIP-seq studies indicate that TAF7L binds to promoters of activated post-meiotic genes in testis. Moreover, biochemical studies show that TAF7L associates with TRF2 both in vitro and in testis suggesting that TAF7L likely cooperates directly with TRF2 at promoters of a subset of post-meiotic genes to regulate spermiogenesis. Our findings thus provide a new mechanism for cell-type specific transcriptional control involving an interaction between a ‘non-prototypic’ core promoter recognition factor (Trf2) and an orphan TAF subunit (Taf7l) in mammalian testis-specific gene transcription. Genome-wide mapping of TAF7L and Pol II in testis tissue, and mRNA-seq expression profiling wild type and Taf7l knockout testis.

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Differential miroRNA expression in round spermatids of GRTH null mice compared to wild type.

Project description:miRNA expression profiles for round spermatids of wild type and GRTH knock-out mice were determined by Rodent TaqMan® Low Density miRNA Arrays A v2.0 (TLDA, Applied Biosystem). Purified round spermatids were prepared from the testis of wild type and GRTH null mice (C57BL/6 strain). Equal amount of total RNA from 20 mice (wild type or GRTH KO) was pooled prior to gene expression analysis.

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