{"database": "metadata", "table": "run_metadata", "rows": [[41563, "SRR5017060", "SRX2345555", "SRS1796130", "SRP093295", "PRJNA353372", "N6 methyladenosine dynamics during early vertebrate embryogenesis", "GSE89815", "Other", "Early vertebrate embryogenesis is characterized by extensive post transcriptional regulation during the maternal to zygotic transition. The N6 methyladenosine m6A modifications on mRNA has been shown to affect both translation and stability of transcripts. Here we investigate the m6A topology during early vertebrate embryogenesis and its association with RNA stability  translation efficiency and effect on miR 430 degradation kinetics. Notably  we find a strong association of m6A with cytoplasmic polyadenylation and translational efficiency prior to zygotic genome activation. Genes required for zygotic genome activation such as nanog and pou5f3 display dynamic m6A levels. post zygotic genome activation m6A is associated with improved stability and dampens the effect of miR 430 mediated degradation. Through sequence analyses we identified enrichment of motifs for RNA binding proteins involved in translational regulation and RNA degradation. We propose a role for m6A in multiple mRNA regulatory mechanisms  for the first time in an in vivo system and improve our understanding of the combinatorial code behind the complex post transcriptional regulation of reprogramming during early vertebrate development. Overall design: Examination of m6A in four different developmental stages", null, null, null, "ip 1cell rep1", "GSM2390013", null, "tissue:Embryos|developmental stage:1cell embryos|strain:AB wild type", "ip 1cell rep1", "Base calling The sequencing output from each of the 4 lanes the sequencing run was trimmed 7 nucleotides in the 5\u2019end  and de multiplexed 4 samples in each lane. Reads were mapped to Zv10 using the STAR aligner Dobin et al.  2013 with options   seedSearchStartLmax 15   clip3pNbases 10   clip5pNbases 10   outFilterMultimapNmax 20   outFilterMismatchNoverLmax 0.05   outFilterMatchNminOverLread 0.0   outFilterMatchNmin 15   outFilterScoreMinOverLread 0.0. We performed peak calling and detection of differentially methylated genes using ExomePeak Meng et al.  2013. Genome build: Zv10 Supplementary files format and content: Bed files with enriched regions from each developmental stage  and txt file with raw and normalized read counts for each gene using the input samples", "Embryos", null, "We isolated total RNA from 4 stages 1 cell/20 minutes post fertilization  2   4  and 6 hpf in batches of 200 embryos using TRIzol Invitrogen  cat.no. 15596 018. We added ERCC spike in RNA TermoFisher scientific  cat.no. 4456740 to the trizol. For each sequencing library two batches of total RNA from 200 embryos were merged and enriched for polyA+ RNA using Dynabeads\u00ae mRNA Purification Kit Ambion  #61006. The m6A RIP experiment was carried out as previously described Ke et al.  2015 and the protocol can be found in supplementary file 1. Briefly  polyA+ enriched RNA was partially fragmented by alkaline hydrolysis  ethanol precipitated and SDS PAGE size selected for 20 80nt. Part of the fragmented RNA was used as input and the rest was immunoprecipitated at 4oC for 2 h using Dynabeads Protein A Life Technologies  # 10008D conjugated anti m6A antibody Synaptic systems  # 202003. post stringent washing  the bound RNA was eluted with 0.5mg/ml N6 methyladenosine sodium salt Sigma Aldrich  # M2780  ethanol precipitated  and resuspended with RNase free water. The eluted RNA and input RNA were subjected to 3\u2019pre adenylated DNA liker ligation with T4 RNA ligase2  truncated KQ NEB  #M0373L  at 16 oC over night. The sequencing library was constructed with bromodeoxyuridine BrdU CLIP protocol described in Weyn Vanhentenryck et al. 2014  with improved RT primers indicated in Ke et al. 2015.", "Embryos from the AB wild type strain were obtained from the NMBU zebrafish facility where the zebrafish were kept at 28\u00b11\u00b0C on a 14 10 hour light dark cycle at a density of 5 10 fish/L. System water SW was prepared from particle and active charcoal filtrated tap water  deionized by reverse osmosis RO and kept sterile by UV irradiation. The water was conditioned to a conductivity of 500\u00b5S/cm  general hardness GH 4 5 and pH 7.5 by addition of 155g synthetic sea salt Instant Ocean  Blacksburg  USA  53g sodium carbonate and 15g calcium chloride Sigma Aldrich per liter RO water. Adult fish were fed with Gemma Micro 300 Skretting  Stavanger  Norway dry feed twice a day and live artemia Scanbur  Karlslunde  Denmark once a day. Health monitoring was by daily inspection  use of sentinel fish sent for pathology ZIRC  Eugene  Oregon and water microbiology analysis NMBU Vetbio  Oslo every six month. Adult fish were allowed to mate for 30 minutes in standard 1L breeding tanks Aquatic Habitats  Apopka  FL. Harvested embryos were kept in autoclaved SW at 28 \u00b0C  harvested by snap freezing liquid nitrogen and visually controlled for stage and lack of abnormalities at the selected time points. All experiments were performed according to Norwegian Animal Welfare Act 2009  the EU Directive 2010/63.", "developmental stage:1cell embryos|strain:AB wild type", "GSM2390013", "GSM2390013: ip 1cell rep1; Danio rerio; RIP Seq", "GSM2390013", null, "1", "We isolated total RNA from 4 stages 1 cell/20 minutes post fertilization  2   4  and 6 hpf in batches of 200 embryos using TRIzol Invitrogen  cat.no. 15596 018. We added ERCC spike in RNA TermoFisher scientific  cat.no. 4456740 to the trizol. For each sequencing library two batches of total RNA from 200 embryos were merged and enriched for polyA+ RNA using Dynabeads\u00ae mRNA Purification Kit Ambion  #61006. The m6A RIP experiment was carried out as previously described Ke et al.  2015 and the protocol can be found in supplementary file 1. Briefly  polyA+ enriched RNA was partially fragmented by alkaline hydrolysis  ethanol precipitated and SDS PAGE size selected for 20 80nt. Part of the fragmented RNA was used as input and the rest was immunoprecipitated at 4oC for 2 h using Dynabeads Protein A Life Technologies  # 10008D conjugated anti m6A antibody Synaptic systems  # 202003. post stringent washing  the bound RNA was eluted with 0.5mg/ml N6 methyladenosine sodium salt Sigma Aldrich  # M2780  ethanol precipitated  and resuspended with RNase free water. The eluted RNA and input RNA were subjected to 3\u2019pre adenylated DNA liker ligation with T4 RNA ligase2  truncated KQ NEB  #M0373L  at 16 oC over night. The sequencing library was constructed with bromodeoxyuridine BrdU CLIP protocol described in Weyn Vanhentenryck et al. 2014  with improved RT primers indicated in Ke et al. 2015.", "GEO Accession:GSM2390013", "RIP-Seq", "TRANSCRIPTOMIC", "other", "SINGLE", "ILLUMINA", "Illumina HiSeq 2000", null, "SRP093295", null, null, "ip_1cell_rep1.fastq.gz", "fastq", 3610167102.0, 38406033.0, "GSM2390013 r1", "0:94", "A:961438376;C:875781200;G:891055201;T:880749228;N:1143097", 94, null, null, null, 961438376, 875781200, 891055201, 880749228, 1143097, "SRX2345555", "SRS1796130", "SRA492943", "GEO", "Klungland Lab, Dept of microbiology, Oslo University Hospital", 1, 0.01939, null, 0.00159, null, 0.96457, null, 0.53652, null, 94, null, "B", null, "usable mapping rate", "illumina", "hiseq_era", "unknown", "poly_a", "unknown", "bulk", "unknown", "unknown", null, "Norway", "2016-11-14", "Zygote", "Embryo", "Embryo Imprecise", "All anatomical structures"]], "columns": ["rowid", "run.accession", "experiment.accession", "sample.accession", "study.accession", "bioproject", "study.title", "study.alias", "study.type", "study.abstract", "study.attributes", "study.PMIDs", "sample.description", "sample.title", "sample.alias", "sample.centername", "sample.attributes", "GEOsample.title", "GEOsample.dataprocessing", "GEOsample.source", "GEOsample.treatmentprotocol", "GEOsample.extractprotocol", "GEOsample.growthprotocol", "GEOsample.characteristics", "GEOsample.accession", "experiment.title", "experiment.alias", "experiment.library_name", "experiment.design_description", "experiment.library_construction_protocol", "experiment.attributes", "experiment.library_strategy", "experiment.library_source", "experiment.library_selection", "experiment.library_layout", "experiment.platform", "experiment.instrument_model", "experiment.spot_descriptor", "experiment.study_ref", "run.title", "run.attributes", "run.filename", "run.semantic_name", "run.total_bases", "run.total_spots", "run.alias", "run.read_lengths", "run.base_counts", "run.r1_length", "run.r2_length", "run.r3_length", "run.r4_length", "run.Acount", "run.Ccount", "run.Gcount", "run.Tcount", "run.Ncount", "run.experiment", "run.pool_member", "submission.accession", "submission.srasource", "submission.bioprojectsource", "seqdetective.n_mates", "seqdetective.mapping_rate.mate1", "seqdetective.mapping_rate.mate2", "seqdetective.nofeature_rate.mate1", "seqdetective.nofeature_rate.mate2", "seqdetective.sparsity.mate1", "seqdetective.sparsity.mate2", "seqdetective.pos_strand_rate.mate1", "seqdetective.pos_strand_rate.mate2", "seqdetective.readlen.mate1", "seqdetective.readlen.mate2", "seqdetective.judgement.mate1", "seqdetective.judgement.mate2", "seqdetective.judgement.reason", "platform_family", "instrument_generation", "read_bias", "selection_class", "prep_kit", "sc_or_bulk", "tech_class", "technology", "tech_variant", "submission.bioprojectsource.country", "earliest_date", "devstage_curation", "devstage_curation_coarse", "tissue_curation", "tissue_curation_coarse"], "primary_keys": ["rowid"], "primary_key_values": ["41563"], "units": {}, "query_ms": 7.865360996220261}