{"database": "metadata", "table": "run_metadata", "rows": [[36268, "SRR953575", "SRX336216", "SRS471212", "SRP028895", "PRJNA138095", "Transcriptome wide analysis of small RNA expression in early zebrafish development", "GSE27722", "Transcriptome Analysis", "During early vertebrate development  a large number of noncoding RNAs are maternally inherited or expressed upon activation of zygotic transcription.  The exact identity  expression levels  and function during early vertebrate development for most of these noncoding RNAs remains largely unknown.  miRNAs microRNAs and piRNAs piwi interacting RNAs are two classes of small non coding RNAs that play important roles in gene regulation during early embryonic development.  Here  we utilized Illumina next generation sequencing technology to determine temporal expression patterns for both miRNAs and piRNAs during four distinct stages of early vertebrate development using zebrafish as a model system.  For miRNAs  the expression patterns for 192 known miRNAs and 12 novel miRNAs within 123 different miRNA families were determined.  Significant sequence variation was observed at the five prime' and three prime' ends of miRNAs with a large number of extra nucleotides added in a non template directed manner.  We also identified a large and diverse set of piRNAs expressed during early development  far beyond that expected if piRNA expression is restricted to germ cells.  Our analyses represent the deepest investigation to date of small RNA expression during early vertebrate development and suggest important novel functions for small RNAs during embryogenesis. Overall design: Identify the expression of small RNAs in zebrafish embryos of four different developmental stages using high through put sequencing", null, "pubmed:22408181", null, "embryo sphere rep2", "GSM686383", null, "source name:the whole embryo|strain:AB*WT|developmental stage:sphere|tissue:the whole embryos", "embryo sphere rep2", "fasta: Initial reads were processed to remove linker sequences using a dynamic alignment algorithm  which allows one mismatch in the linker sequences. All the sequence with N inside was removed as well. The unique sequences were retained with the counts indicating thier abundance. The header of each sequence is composed of a unique sequence ID followed by a \" x\" and the reads counts. e.g. unique ID x counts. alignment: Initial reads were processed to remove linker sequences using a dynamic alignment algorithm  which allows one mismatch in the linker sequences.  Small RNAs with perfect matches to the zebrafish genome Zv8 from Ensembl http://www.ensembl.org were retrieved using megaBLAST http://www.ncbi.nlm.nih.gov/blast/megablast.shtml and Bowtie http://bowtie bio.sourceforge.net/tutorial.shtml. To identify piRNAs  consensus sequences from zebrafish repetitive elements were retrieved from Repbase http://www.girinst.org/repbase/index.html and Repeat Maskers using the UCSC genome browser http://genome.ucsc.edu.  Small RNAs perfectly mapping to these consensus sequences and their genomic flanking regions were sorted into piRNA libraries with up to 3 genomic mapping positions for each unique RNA sequence. fasta files description: small RNA 15 30 nt alignment file description: piRNA map to repetitive elements", "the whole embryo", null, "Zebrafish embryos were collected at the 256 cell stage  sphere stage  shield stage  and 1dpf.  Total RNA was isolated from embryos using Trizol.  RNAs were fractionated on 15% denaturing polyacrylamide gels and small RNAs between 15 30 nucleotides were excised and purified.  cDNA libraries were generated using specific linkers and RT/PCR  as previously described.  Libraries were sequenced in the Genome Technology Core of Vanderbilt University using the Illumina sequencing platform.", "Embryos were raised at 28\u00c2\u00b0C in egg water 0.03% Instant Ocean marine salt mix for the initial several hours of development", "strain:AB*WT|developmental stage:sphere|tissue:the whole embryos", "GSM686383", "GSM686383: embryo sphere rep2; Danio rerio; ncRNA Seq", "GSM686383", null, "1", "Zebrafish embryos were collected at the 256 cell stage  sphere stage  shield stage  and 1dpf.  Total RNA was isolated from embryos using Trizol.  RNAs were fractionated on 15% denaturing polyacrylamide gels and small RNAs between 15 30 nucleotides were excised and purified.  cDNA libraries were generated using specific linkers and RT/PCR  as previously described.  Libraries were sequenced in the Genome Technology Core of Vanderbilt University using the Illumina sequencing platform.", "GEO Accession:GSM686383", "ncRNA-Seq", "TRANSCRIPTOMIC", "size fractionation", "SINGLE", "ILLUMINA", "Illumina Genome Analyzer II", null, "SRP028895", null, null, "GSM686383_Sphere_2_Raw.txt", "fastq", 369741456.0, 10270596.0, "GSM686383 r1", "0:36", "A:89854472;C:70044086;G:109552597;T:100266590;N:23711", 36, null, null, null, 89854472, 70044086, 109552597, 100266590, 23711, "SRX336216", "SRS471212", "SRA098146", "GEO", "Lee Lab, Molecular Biology, Mass General Hospital", 1, 0.00421, null, 0.00367, null, 0.99924, null, 0.51111, null, 36, null, "T", null, "under 1.2% mapping rate", "illumina", "early_illumina", "5prime", "size_fractionation", "unknown", "bulk", "unknown", "unknown", null, "United States", "2011-03-07", "Blastula", "Embryo", "Whole Organism", "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": ["36268"], "units": {}, "query_ms": 10.30743400042411}