Functional genomics of genes involved in Paramecium MAC genome development - sRNA-seq
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ABSTRACT:
PROVIDER: PRJEB18055 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| ERR1739700.fastq.gz | Fastqsanger.gz | |||
| ERR1739701.fastq.gz | Fastqsanger.gz | |||
| ERR1739702.fastq.gz | Fastqsanger.gz | |||
| ERR1740110.fastq.gz | Fastqsanger.gz | |||
| ERR1740111.fastq.gz | Fastqsanger.gz |
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Project description:Functional genomics of genes involved in Paramecium MAC genome development - DNA-seq
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Project description:P. tetraurelia, like all ciliates, is a unicellular eukaryote processing two different kinds of nuclei, germline micronuclei (mic) and somatic macronucleus (mac). The diploid micronuclei undergo meiosis during sexual events to transmit the germline genome to the next generation. The highly polyploid mac (~800 n) is responsible for transcription during the life cycle but is lost after fertilisation; the new mic and mac develop from mitotic copies of the zygotic nucleus. During development of the new mac, the germline genome is amplified from 2n to ~800n and is extensively rearranged by two distinct kinds of DNA elimination. The micronuclear 50 to 60 Chromosomes are fragmented into ~200 shorter molecules caped by de novo telomere addition as a result of the imprecise elimination transposons and minisatellites. Moreover, approximately 60,000 short, single-copy elements called internal eliminated sequences (IESs) are precisely removed from coding and non-coding sequences. It was shown that the rearrangements in the developing mac appear to reproduce the rearrangements observed in the old mac, implying the existence of homology dependent cross talk between germline and somatic genomes during sexual event. To understand the molecular mechanisms and the genetic control involved in genome rearrangements, we studied the evolution of the transcriptome during Paramecium tetraurelia sexual reproduction.
2010-07-07 | GSE18002 | GEO
Project description:MAC DNA sequencing of Paramecium meiotic factors
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Project description:MAC DNA sequencing of Paramecium meiotic factors
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Project description:The unicellular eukaryote Paramecium tetraurelia contains functionally distinct nuclei: germline micronuclei (MICs) and a somatic macronucleus (MAC). During sexual reproduction, the MIC genome is reorganized into a new MAC genome and the old MAC is lost. Almost 45,000 unique Internal Eliminated Sequences (IESs) located throughout the genome require precise excision to guarantee a functional new MAC genome. Here, we characterize a pair of paralogous PHD finger proteins involved in DNA elimination. DevPF1, the early-expressed paralog, is present in only some of the gametic and post-zygotic nuclei during meiosis. Both DevPF1 and DevPF2 localize in the new developing MACs, where IESs excision occurs. In DevPF2 knockdown (KD), long IESs are preferentially retained and late-expressed small RNAs decrease; no length preference for retained IESs was observed in DevPF1-KD and development-specific small RNAs were abolished. The expression of at least two genes from the new MAC seems to be influenced by DevPF1- and DevPF2-KD. Thus, both PHD fingers are crucial for new MAC genome development, with distinct functionalities, potentially via regulation of non-coding and coding transcription in the MICs and new MACs.
2024-08-30 | PXD046704 | Pride
Project description:Paramecium cells in log-phase growth were treated for deciliation and total mRNA extracted at two time points after deciliation. This is usefull to study genes involved in cilia biogenesis. Time points are : T0 : mRNA extracted before deciliation. T30 : mRNA extracted 30 minutes after deciliation. T120 : mRNA extracted 120 minutes after deciliation.
2009-11-01 | GSE12620 | GEO
Project description:In the ciliate Paramecium tetraurelia, autogamy is a self-fertilization process, during which the zygotic nucleus results from the fusion of two identical gametic nuclei. This phenomenon occurs in response to starvation. It starts with meiosis of the germline nuclei (micronuclei or MIC) and fragmentation of the parental somatic nucleus (macronucleus or MAC). This is followed by mitotic division of one haploid nucleus issued from meiosis to yield two identical gametic nuclei, then karyogamy takes place, followed by mitosis of zygotic nucleus and differentiation of new MICs and MACs from the resulting copies of the zygotic nucleus. Within the developing new MACs, developmentally programmed DNA amplification and extensive genome rearrangements (precise excision of short non coding Internal Eliminated Sequences and chromosome fragmentation associated with the imprecise elimination of repetitive DNA) give rise to the highly polyploid somatic genome. To gain further insight into the complex regulation of these successive steps, we used whole genome microarrays to study the different gene networks that become activated throughout autogamy.
2010-07-07 | GSE17998 | GEO
Project description:In the ciliate Paramecium tetraurelia, autogamy is a self-fertilization process, during which the zygotic nucleus results from the fusion of two identical gametic nuclei. This phenomenon occurs in response to starvation. It starts with meiosis of the germline nuclei (micronuclei or MIC) and fragmentation of the parental somatic nucleus (macronucleus or MAC). This is followed by mitotic division of one haploid nucleus issued from meiosis to yield two identical gametic nuclei, then karyogamy takes place, followed by mitosis of zygotic nucleus and differentiation of new MICs and MACs from the resulting copies of the zygotic nucleus. Within the developing new MACs, developmentally programmed DNA amplification and extensive genome rearrangements (precise excision of short non coding Internal Eliminated Sequences and chromosome fragmentation associated with the imprecise elimination of repetitive DNA) give rise to the highly polyploid somatic genome. To gain further insight into the complex regulation of these successive steps, we used whole genome microarrays to study the different gene networks that become activated throughout autogamy.
2010-07-07 | GSE17997 | GEO
Project description:In the ciliate Paramecium tetraurelia, autogamy is a self-fertilization process, during which the zygotic nucleus results from the fusion of two identical gametic nuclei. This phenomenon occurs in response to starvation. It starts with meiosis of the germline nuclei (micronuclei or MIC) and fragmentation of the parental somatic nucleus (macronucleus or MAC). This is followed by mitotic division of one haploid nucleus issued from meiosis to yield two identical gametic nuclei, then karyogamy takes place, followed by mitosis of zygotic nucleus and differentiation of new MICs and MACs from the resulting copies of the zygotic nucleus. Within the developing new MACs, developmentally programmed DNA amplification and extensive genome rearrangements (precise excision of short non coding Internal Eliminated Sequences and chromosome fragmentation associated with the imprecise elimination of repetitive DNA) give rise to the highly polyploid somatic genome. To gain further insight into the complex regulation of these successive steps, we used whole genome microarrays to study the different gene networks that become activated throughout autogamy.
2010-07-07 | GSE17996 | GEO
Project description:Paramecium tetraurelia PtCAF1 knockdown sRNA sequencing
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