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Cell-type-specific interacting proteins collaborate to regulate the timing of Cyclin B protein expression in male meiotic prophase [easyCLIP]

ABSTRACT: Cell-type-specific interacting proteins collaborate to regulate the timing of Cyclin B protein expression in male meiotic prophase [easyCLIP]

PROVIDER: PRJNA1037701 | ENA |

REPOSITORIES: ENA

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Cell-type-specific interacting proteins collaborate to regulate the timing of Cyclin B protein expression in male meiotic prophase

Project description:Cell-type-specific interacting proteins collaborate to regulate the timing of Cyclin B protein expression in male meiotic prophase

| PRJNA1037472 | ENA

Cell-type-specific interacting proteins collaborate to regulate the timing of Cyclin B protein expression in male meiotic prophase [easyCLIP]

Project description:During meiosis, germ cell and stage-specific components impose additional layers of regulation on the core cell cycle machinery to set up an extended G2 period termed meiotic prophase. In Drosophila males, meiotic prophase lasts 3.5 days, during which spermatocytes upregulate over 1800 genes and grow 25-fold. Previous work has shown that the cell cycle regulator Cyclin B (CycB) is subject to translational repression in immature spermatocytes, mediated by the RNA-binding protein Rbp4 and its partner Fest. Here, we show that the spermatocyte-specific protein Lut is required for translational repression of cycB in an 8-h window just before spermatocytes are fully mature. In males mutant for rbp4 or lut, spermatocytes enter and exit meiotic division 6-8 h earlier than in wild type. In addition, spermatocyte-specific isoforms of Syncrip (Syp) are required for expression of CycB protein in mature spermatocytes and normal entry into the meiotic divisions. Lut and Syp interact with Fest independent of RNA. Thus a set of spermatocyte-specific regulators choreograph the timing of expression of CycB protein during male meiotic prophase.

2023-11-12 | GSE247385 | GEO

Cell-type-specific interacting proteins collaborate to regulate the timing of Cyclin B protein expression in male meiotic prophase [RNA-seq]

2023-11-12 | GSE247386 | GEO

Cell-type-specific interacting proteins collaborate to regulate the timing of Cyclin B protein expression in male meiotic prophase [RNA-seq]

Project description:Cell-type-specific interacting proteins collaborate to regulate the timing of Cyclin B protein expression in male meiotic prophase [RNA-seq]

| PRJNA1037700 | ENA

Cell-type-specific interacting proteins collaborate to regulate the timing of Cyclin B protein expression in male meiotic prophase

Project description:This SuperSeries is composed of the SubSeries listed below.

2023-11-12 | GSE247388 | GEO

MEIOC interacting proteins during meiotic prophase I

Project description:The meiosis-specific chromosomal events of homolog pairing, synapsis, and recombination occur over an extended meiotic prophase I. In this study, we show that, in mice, maintenance of an extended meiotic prophase I requires the gene Meioc, a germ-cell specific factor conserved in most metazoans. Using immunoprecipitation and quantitative mass spectrometry, we identify proteins that interact with MEIOC in the mouse germ line.

2017-03-27 | PXD005473 | Pride

Meiotic cohesins modulate chromosome compaction during meiotic prophase in fission yeast

Project description:The meiotic cohesin Rec8 is required for the stepwise segregation of chromosomes during the two rounds of meiotic division. By directly measuring chromosome compaction in living cells of the fission yeast Schizosaccharomyces pombe, we found an additional role for the meiotic cohesin in the compaction of chromosomes during meiotic prophase. In the absence of Rec8, chromosomes were decompacted relative to those of wild-type cells. Conversely, loss of the cohesin-associated protein Pds5 resulted in hyper-compaction. While this hyper-compaction requires Rec8, binding of Rec8 to chromatin was reduced in the absence of Pds5, indicating that Pds5 promotes chromosome association of Rec8. To explain these observations, we propose that meiotic prophase chromosomes are organized as chromatin loops emanating from a Rec8-containing axis; the absence of Rec8 disrupts the axis, resulting in disorganized chromosomes, whereas reduced Rec8 loading results in a longitudinally compacted axis with fewer attachment points and longer chromatin loops. Keywords: ChIP-chip analysis ChIP analysis of Rec8: In all cases, hybridization data for ChIP fraction was compared with that of SUP (supernatant) fraction. Pombe chromosome II, III array was used.

2010-07-01 | E-GEOD-5284 | biostudies-arrayexpress

Cyclin Cyc2 is required for elongation of meiotic micronucleus in Tetrahymena thermophila

Project description:Meiosis occurs in all sexually reproducing unicellular and multicellular eukaryotes. Bouquet formation is indispensible for homologous pairing or recombination during meiotic prophase I, but the regulatory mechanism of this process remain largely unknown. Cyclins regulate the precise meiosis progression by activating cyclin-dependent kinases. We therefore investigated the functional contribution of cyclin Cyc2p during bouquet (named crescent in Tetrahymena) formation in Tetrahymena thermophila. As a conjugation specific gene, CYC2 expression is significantly upregulated at 2-4 h after the initiation of conjugation and Cyc2p mainly localized in cytoplasm as well as weakly in the meiotic micronucleus (Mic). CYC2 knockout mutants failed to form elongated crescent structure and aborted meiotic development. Mic DNA double-strand breakage (DSB) decreased in ΔCYC2 cells as shown by γ-H2A.X staining, consistent with the finding that expression level of SPO11, DMC1, and RAD51 decreased in ΔCYC2 cells. However, ΔCYC2 cells failed to form crescent structure when artificial DSBs were induced, indicating that the inability to enter crescent phase was not completely due to the lack of DSBs. The localization of tubulin showed that impaired structure of nuclei and nuclear membrane may contribute to the blocked Mic elongation. This is further supported by the observation that expression levels of two microtubule associated kinesin genes, KIN11 and KIN141, were significantly downregulated in ΔCYC2 cells. Interestingly, scnRNA accumulation seemed intact in ΔCYC2 cells whereas the intensity of the heterochromatin marker H3K23me3 was abnormally increased. Together, these results showed that cyclin Cyc2p is required for micronuclear meiosis by controlling meiotic prophase chromosome breakage and the microtubule movement of nuclei in Tetrahymena.

2018-12-14 | GSE108064 | GEO

Dynamic Reorganization of the Genome Shapes the Recombination Landscape in Meiotic Prophase

Project description:In meiotic prophase, chromosomes are organized into compacted loop arrays to promote homolog pairing and recombination. Here, we probe the architecture of the mouse spermatocyte genome in early and late meiotic prophase using Hi-C. We show that early-prophase chromosomes are arranged as linear arrays of 0.8-1 Mb loops, which extend to 1.5-2 Mb in late prophase as chromosomes compact and homologs undergo synapsis. Topologically associating domains (TADs) are lost in meiotic prophase, suggesting that assembly of the meiotic chromosome axis dramatically reduces the dynamics of chromosome-associated cohesin complexes. While TADs are lost, physically-separated A and B compartments are maintained in meiotic prophase. Moreover, meiotic DNA breaks and inter-homolog crossovers preferentially form in the gene-dense A compartment, revealing a role for chromatin organization in meiotic recombination. Finally, direct detection of inter-homolog contacts genome-wide reveals the structural basis for homolog alignment and juxtaposition by the synaptonemal complex.

2018-11-17 | GSE122622 | GEO

Transcriptome analysis of meiotic prophase spermatocytes in Zfp541 +/- and Zfp541 KO mice

Project description:ZFP541 is one of the candidates for a transcriptional regulator during mouse meiotic prophase. In order to address the role of ZFP541, transcriptomes of meiotic prophase-enriched population were compared between Zfp541 +/- and Zfp541 KO testes by RNA-seq. The meiotic prophase-enriched population was isolated from Zfp541 +/- and Zfp541 KO testes at postnatal day 18 (P18), on the Rec8-3FH-GFP KI background by fluorescent sorting of GFP positive cells.

2020-12-29 | GSE163917 | GEO

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