run_metadata: 41550

This data as json

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
41550	SRR5017073	SRX2345568	SRS1796132	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				ip shield rep2	GSM2390026		tissue:Embryos\|developmental stage:Shield stage embryos\|strain:AB wild type	ip shield rep2	Base calling The sequencing output from each of the 4 lanes the sequencing run was trimmed 7 nucleotides in the 5’end 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		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® 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’pre 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±1°C 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 500µS/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 °C 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:Shield stage embryos\|strain:AB wild type	GSM2390026	GSM2390026: ip shield rep2; Danio rerio; RIP Seq	GSM2390026		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® 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’pre 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:GSM2390026	RIP-Seq	TRANSCRIPTOMIC	other	SINGLE	ILLUMINA	Illumina HiSeq 2000		SRP093295			ip_shield_rep2.fastq	fastq	3855863926.0	41019829.0	GSM2390026 r1	0:94	A:1044010018;C:931492803;G:952890289;T:926349254;N:1121562	94				1044010018	931492803	952890289	926349254	1121562	SRX2345568	SRS1796132	SRA492943	GEO	Klungland Lab, Dept of microbiology, Oslo University Hospital	1	0.03311		0.00481		0.96337		0.68612		94		B		usable mapping rate	illumina	hiseq_era	unknown	poly_a	unknown	bulk	unknown	unknown		Norway	2016-11-14	Gastrula	Embryo	Embryo Imprecise	All anatomical structures