PABPN1 promotes meiotic maturation of oocytes by interacting with PAPOLA
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA762877 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR15871701_1.fastq.gz | Fastqsanger.gz | |||
| SRR15871701_2.fastq.gz | Fastqsanger.gz | |||
| SRR15871702_1.fastq.gz | Fastqsanger.gz | |||
| SRR15871702_2.fastq.gz | Fastqsanger.gz | |||
| SRR15871703_1.fastq.gz | Fastqsanger.gz |
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Project description:The growing oocytes stored a large amount of maternal mRNA to support the subsequent "maternal-zygotic transition" process, which is a key regulatory events in female reproduction. The accumulation of maternal mRNA in the growing oocyte determines the developmental potential of the oocyte. At present, it is not clear how the growing oocytes store and process the newly transcribed mRNA under physiological conditions, including the distribution and localization of mRNA in the oocyte, as well as the molecular mechanism and physiological significance of this localization. In this study, we found that poly(A) tailed mRNA has the dynamic distributions of droplet fusion and gradual disappearance in the mouse nucleus as oocyte growth and meiotic maturation. Our research found that PABPN1 modulated the dynamic compartmentalization of mRNA with poly(A) tails to form NmPD (nuclear mRNA processing domain) during the growing oocytes through phase separation. The NmPD in Pabpn1-null oocytes could not form the compartmentalized distribution, and the Pabpn1 knockout females were sterile with defects of premature ovarian failure. Combined with multi-omics sequencing analysis, we investigate that NmPD was essential for long 3'-UTR isoform formation and the stability of mRNA in growing oocytes.
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Project description:Oocyte maturation refers to oocytes at the germinal vesicle stage progressing into metaphase II (MII) stage of development. Even though numerous studies have shown key genes and potential important signalling cascades, which drive the GV to MII transition, a system-wide analysis of underlying differences at gene level and especially at transcript level between the two developmental stages of the oocyte is still lacking. For this, we profiled and analysed RNA from pig oocytes across meiotic maturation (GV, MII and damaged, n=15). We detected 22,516 genes for each sample across meiotic maturation. Principal Component analysis of the data clustered the samples in three stages of development (GV, MII and damaged). Differential expression of genes between the three stages will then be used to delineate the pathways which are up-/down-regulated during these developmental stages. Besides, differential transcript usage will be used to identify the difference of oocytes at distinct developmental stages at isoform level, which might be ignored by traditional differential gene expression analysis.
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