Genome-wide analysis of mRNA polyadenylation and translation during vertebrate oocyte maturation
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA555524 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR9715860.fastq.gz | Fastqsanger.gz | |||
| SRR9715870.fastq.gz | Fastqsanger.gz | |||
| SRR9715880.fastq.gz | Fastqsanger.gz | |||
| SRR9715861.fastq.gz | Fastqsanger.gz | |||
| SRR9715871.fastq.gz | Fastqsanger.gz |
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Project description:Changes in gene expression are required to orchestrate changes in cell state during development. Most cells change patterns of gene expression through transcriptional regulation. In contrast, oocytes are transcriptionally silent and use changes in mRNA poly-A tail length to control protein production. Recent technical advances have enabled genome-wide measurement of poly-A tail length. Poly-A tail lengthening is correlated with translational activation and poly-A tail shortening is correlated with translational repression at a global level during early development. However, it is not clear how poly-A tail changes affect mRNA translation at a global level during vertebrate oocyte maturation. We used TAIL-seq and polyribosome analysis to measure poly-A tail and translational changes during oocyte maturation in Xenopus laevis. We found that the transcriptome undergoes large-scale poly-A and translational changes during oocyte maturation and that poly-A tail length and translation are well-correlated. Interestingly, we found that poly-A tail changes precede translation changes. Additionally, we identified a family of U-rich sequence elements that are enriched near the polyadenylation signal of polyadenylated and translationally activated mRNAs. Interestingly, we found that cytoplasmic polyadenylation is not sufficient to activate translation, which requires a specific density and spacing of U-rich elements. Collectively, our data shows that changes in mRNA polyadenylation are the dominant mechanism controlling protein expression during vertebrate oocyte maturation and that these changes are controlled by a group of cis-acting sequence elements. Our results provide insight into mechanisms of translational control in oocytes and identify novel proteins important for the completion of meiosis.
2020-01-14 | GSE134537 | GEO
Project description:PABPN1 couples the polyadenylation and translation of maternal transcripts to mouse oocyte meiotic maturation
| PRJNA1157193 | ENA
Project description:In the process of mammalian maternal-to-zygotic transition (MZT), the degradation of zygotic decay (Z-decay) mRNA is later than that of maternal factor-mediated mRNA decay (M-decay) mRNA. The regulatory mechanism and physiological significance of Z-decay mRNA to maintain stability during meiosis are urgent scientific questions. In this study, we identified that PAPα worked together with poly(A)-bound RNA binding protein PABPN1 to promote the polyadenylation and translation of maternal transcripts, leading to rupture of germinal vesicles in mammalian oocytes. The oocytes specifically knocked out Pabpn1 at the primary follicle stage could develop into the fully grown (FGO) stage, but hardly could enter to the meiotic process. Furthermore, PABPN1 maintains the stability of Z-decay maternal transcripts during oocyte meiotic maturation. A number of Z-decay transcripts and the translational activity in Pabpn1-null oocytes was significantly lower than that of wild-type oocytes during meiosis. Therefore, during meiotic maturation of oocytes, PABPN1 maintains the stability of Z-decay transcripts and promotes the degradation of some M-decay transcripts, ensuring normal GVBD and polar body-1 emission.
2025-07-02 | GSE276390 | GEO
Project description:The sequences deposited within this study are for the analysis of the changing transcriptome during zebrafish oocyte maturation. This dataset will be used to study the differential expression of mRNAs during oocyte maturation and also mechanisms of RNA stability and degradation, transcription and polyadenylation. Sequences will be generated using polyA selection and then, after reverse transcription, generated into illumina libraries. This data is part of a pre-publication release. For information on the proper use of pre-publication data shared by the Wellcome Trust Sanger Institute (including details of any publication moratoria), please see http://www.sanger.ac.uk/datasharing/
2014-09-09 | E-ERAD-212 | biostudies-arrayexpress
Project description:Oocyte maturation, fertilization, and early embryonic development occur in the absence of gene transcription. Therefore, it is critical to understand at a global level the post-transcriptional events that are driving these transitions. Here, we have used a systems approach by combining polysome mRNA profiling and bioinformatics to identify RNA binding motifs in mRNAs that either enter or exit the polysome pool during mouse oocyte maturation. Association of mRNA with the polysomes correlates with active translation.
2012-01-14 | GSE35106 | GEO
Project description:During oocyte maturation and early embryonic development, poly(A)-tail lengths strongly influence mRNA translation. However, how tail lengths are controlled at different developmental stages has been unclear. Here, we performed tail-length and translational profiling of mRNA reporter libraries (each with > 10 million 3ʹ-UTR sequence variants) in frog oocytes and embryos, and fish embryos. These analyses revealed that the UUUUA motif specifies cytoplasmic polyadenylation and identified diverse context features that modulate the activity of this 5-mer. Additional sequence motifs drive stage-specific deadenylation in embryos, and UUUUA and C-rich motifs drive tail-length-independent translational repression in oocytes. A neural network model accurately predicts tail-length change during oocyte maturation in frogs, mice, and humans. Analyses of human sequence variants showed that those predicted to disrupt tail-length control have been under negative selection, implying that our insights into control of poly(A)-tail length and translation have implications for human health and fertility.
2024-02-15 | GSE241107 | GEO
Project description:Oocyte maturation, fertilization, and early embryonic development occur in the absence of gene transcription. Therefore, it is critical to understand at a global level the post-transcriptional events that are driving these transitions. Here, we have used a systems approach by combining polysome mRNA profiling and bioinformatics to identify RNA binding motifs in mRNAs that either enter or exit the polysome pool during mouse oocyte maturation. Association of mRNA with the polysomes correlates with active translation. Forty-eight hours (h) after PMSG injection, mice were stimulated with hCG for 0, 4, or 14 h, and GV-, MI- and MII-stage oocytes were collected. Polysome-bound mRNAs were purified, reverse-transcribed and linearly amplified with the WT-Ovation FFPE RNA Amplification System V2 (NuGEN). 5µg cDNA were fragmented and hybridized with Affymetrix Mouse Genome 430.2 array chips. Experiments were done using 3 independent sample sets.
2012-01-14 | E-GEOD-35106 | biostudies-arrayexpress
Project description:Most cells change patterns of gene expression through transcriptional regulation. In contrast, oocytes are transcriptionally silent and regulate mRNA poly(A) tail length to control protein production. However, the genome-wide relationship of poly(A) tail changes to mRNA translation during vertebrate oocyte maturation is not known. We used Tail-seq and polyribosome analysis to measure poly(A) tail and translational changes during oocyte maturation in Xenopus laevis We identified large-scale poly(A) and translational changes during oocyte maturation, with poly(A) tail length changes preceding translational changes. Proteins important for completion of the meiotic divisions and early development exhibited increased polyadenylation and translation during oocyte maturation. A family of U-rich sequence elements was enriched near the polyadenylation signal of polyadenylated and translationally activated mRNAs. We propose that changes in mRNA polyadenylation are a conserved mechanism regulating protein expression during vertebrate oocyte maturation and that these changes are controlled by a spatial code of cis-acting sequence elements.
| S-EPMC7025505 | biostudies-literature
Project description:In vitro oocyte maturation (IVM) holds great promise as a tool for enhancing clinical treatment of infertility, enhancing availability of non human primates for development of disease models, and facilitating endangered species preservation. However, IVM outcomes have remained significantly below success rates obtained using in vivo matured (VVM) oocytes from humans and non human primates. A cDNA array based analysis is presented, comparing the transcriptomes of VVM oocytes with IVM oocytes. We observe a small set of just 59 mRNAs that are differentially expressed between the two cell types. These mRNAs are related to cellular homeostasis, cell-cell interactions including growth factor and hormone stimulation and cell adhesion, and other functions such as mRNA stability and translation. Additionally, we observe in IVM oocytes overexpression of PLAGL1 and MEST, two maternally imprinted genes, indicating a possible interruption or loss of correct epigenetic programming. These results indicate that, under certain IVM conditions, oocytes that are molecularly highly similar to VVM oocytes can be obtained, however the interruption of normal oocyte-somatic cell interactions during the final hours of oocyte maturation may preclude the establishment of full developmental competence. Keywords: oocyte maturation Comparison of in vitro matured MII-stage oocytes (4 biological replicates) with in vivo matured MII-stage oocytes (4 biological replicates)
2009-05-20 | E-GEOD-11895 | biostudies-arrayexpress
Project description:Oocyte maturation is the foundation for developing healthy individuals of mammals. Upon germinal vesicle breakdown, oocyte meiosis resumes and the synthesis of new transcripts ceases. To quantitatively profile the transcriptomic dynamics after meiotic resumption throughout the oocyte maturation, we generated transcriptome sequencing data with individual mouse oocytes at three main developmental stages: germinal vesicle (GV), metaphase I (MI), and metaphase II (MII). When clustering the sequenced oocytes, results showed that isoform-level expression analysis outperformed gene-level analysis, indicating isoform expression provided extra information that was useful in distinguishing oocyte stages. Comparing transcriptomes of the oocytes at the GV stage and the MII stage, in addition to identification of differentially expressed genes (DEGs), we detected many differentially expressed transcripts (DETs), some of which came from genes that were not identified as DEGs. When breaking down the isoform-level changes into alternative RNA processing events, we found the main source of isoform composition changes was the alternative usage of polyadenylation sites. With detailed analysis focusing on the alternative usage of 3'-UTR isoforms, we identified, out of 3810 tested genes, 512 (13.7%) exhibiting significant switches of 3'-UTR isoforms during the process of moues oocyte maturation. Altogether, our data and analyses suggest the importance of examining isoform abundance changes during oocyte maturation, and further investigation of the pervasive 3'-UTR isoform switches in the transition may deepen our understanding on the molecular mechanisms underlying mammalian early development.
2021-10-05 | GSE178836 | GEO