Caenorhabditis elegans
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ABSTRACT:
PROVIDER: PRJNA307605 | ENA |
REPOSITORIES: ENA
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Project description:This project aims to identify novel RNA binding proteins in the nematode, Caenorhabditis elegans. Since interactions between RNAs and proteins may be transient, these animals were crosslinked with UV light at 254 nm which promotes the covalent link between proteins and RNAs. After this, polyadenylated mRNAs were purified via oligo(dT) coupled to magentic beads under stringent conditions. Finally, samples were subjected to mass spectrometry analysis. To rule out the possibility of RNA-independent binding we also analysed other samples: i) samples digested with RNase one; ii) samples where we performed competition assays with polyadenylic acid
2015-10-26 | PXD002226 | Pride
Project description:The nematode Caenorhabditis elegans has evolutionarily conserved EV signaling pathways. In this study, we apply a recently published method for high specificity purification of EVs from C. elegans to carry out target-independent proteomic and RNA analysis of EVs from C. elegans. Our experiments uncovered diverse coding and non-coding RNA transcripts as well as protein cargo types commonly found in human EVs.
2020-08-05 | GSE146973 | GEO
Project description:PUF RNA-binding proteins control stem cells in diverse species, including mammalian, arthropod, and nematode, in addition to other biological functions. The C. elegans PUF protein FBF serves as a paradigm for metazoan PUFs. FBF is essential for the maintenance of germline stem cells but also regulates the hermpahrodite sperm/oocyte cell fate switch and is critical for the process of spermatogenesis. We have attempted to “disentangle” the different roles of FBF by comparing its targets in spermatogenic and oogenic germlines. To this end, we used FBF iCLIP to learn its binding profile in an adult hermaphrodite germline that is sexually transformed and makes only sperm due to a temperature-sensitive sex-determination mutant. As a control, we analyzed FBF iCLIP data from oogenic germlines at the same temperature. Using a modified peak calling algorithm, we identified FBF binding sites in oogenic animals at 20°C, oogenic animals at 25°C, and spermatogenic animals at 25°C. Oogenic FBF targets were similar at 20°C and 25°C. By contrast, FBF mRNA targets in spermatogenetic animals had a distinct profile, revealing sperm-specific targets that are likely critical for the FBF role in spermatogenesis. Most importantly, we found FBF bound to mRNAs regardless of germline gender. In particular, a group of 22 mRNAs clustered as bound with high frequency in a gender- and temperature-independent manner. These 22 mRNAsencode RNA-binding proteins and stem cell regulators and may be crucial for the FBF role in in stem cell maintenance.
2018-03-30 | GSE83695 | GEO
Project description:N2 young adult animals were analyzed four hours after exposure to wild-type Candida albicans DAY185, heat-killed C. albicans DAY185 and heat-killed Escherichia coli OP50, all on Brain Heart Infusion (BHI) agar. It was necessary to use heat-killed E. coli OP50 as a control for these experiments because live E. coli OP50 (the normal nematode food source) is pathogenic to nematodes on BHI agar. These data identify the C. elegans genes that are differentially regulated during nematode infection with a human fungal pathogen.
2011-06-04 | GSE27401 | GEO
Project description:Bio-electrospraying the nematode Caenorhabditis elegans
| PRJNA117707 | ENA
Project description:In vivo and transcriptome-wide identification of RNA-binding protein target sites [RNA-Seq]
| PRJNA154343 | ENA
Project description:Gene silencing mediated by dsRNA (RNAi) can persist for multiple generations in C. elegans (termed RNAi inheritance). Here we describe the results of a forward genetic screen in C. elegans that has identified six factors required for RNAi inheritance: GLH-1/VASA, PUP-1/CDE-1, MORC-1, SET-32, and two novel nematode-specific factors that we term here (heritable RNAi defective) HRDE-2 and HRDE-4. The new RNAi inheritance factors exhibit mortal germline (Mrt) phenotypes, which we show is likely caused by epigenetic deregulation in germ cells. We also show that HRDE-2 contributes to RNAi inheritance by facilitating the binding of small RNAs to the inheritance Argonaute (Ago) HRDE-1. Together, our results identify additional components of the RNAi inheritance machinery whose sequence conservation provides insights into the molecular mechanism of RNAi inheritance, further our understanding of how the RNAi inheritance machinery promotes germline immortality, and show that HRDE-2 couples the inheritance Ago HRDE-1 with the small RNAs it needs to direct RNAi inheritance and germline immortality.
2017-06-20 | GSE92840 | GEO
Project description:An extended meiotic prophase is a hallmark of oogenesis. Hormonal signaling activates the CDK1/cyclin B kinase to promote oocyte meiotic maturation, which involves nuclear and cytoplasmic events. Nuclear maturation encompasses nuclear envelope breakdown, meiotic spindle assembly, and chromosome segregation. Cytoplasmic maturation involves major changes in oocyte protein translation and cytoplasmic organelles and is poorly understood. In the nematode Caenorhabditis elegans, sperm release the major sperm protein (MSP) hormone to promote oocyte growth and meiotic maturation. Large translational regulatory ribonucleoprotein (RNP) complexes containing the RNA-binding proteins OMA-1, OMA-2, and LIN-41 regulate meiotic maturation downstream of MSP signaling. To understand the control of translation during meiotic maturation, we purified LIN-41-containing RNPs and characterized their protein and RNA components. Protein constituents of LIN-41 RNPs include essential RNA-binding proteins, the GLD-2 cytoplasmic poly(A) polymerase, the CCR4-NOT deadenylase complex, and translation initiation factors. RNA sequencing defined mRNAs associated with both LIN-41 and OMA-1, as well as sets of mRNAs associated with either LIN-41 or OMA-1. Genetic and genomic evidence suggests that GLD-2, which is a component of LIN-41 RNPs, stimulates the efficient translation of many LIN-41-associated transcripts. We analyzed the translational regulation of two transcripts specifically associated with LIN-41 that encode the RNA regulators SPN-4 and MEG-1. We found that LIN-41 represses translation of spn-4 and meg-1, whereas OMA-1 and OMA-2 promote their expression. Upon their synthesis, SPN-4 and MEG-1 assemble into LIN-41 RNPs prior to their functions in the embryo. This study defines a translational repression-to-activation switch as a key element of cytoplasmic maturation.
2017-06-16 | PXD006726 | Pride
Project description:Toxicogenomic responses of PCB52 in the nematode Caenorhabditis elegans
| PRJNA98405 | ENA