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Sample GSM2735642 Query DataSets for GSM2735642
Status Public on Feb 13, 2019
Title fwt_rep3 [small RNA-seq]
Sample type SRA
Source name AEP1_wt
Organism Schizosaccharomyces pombe
Characteristics strain: AEP1
genotype/variation: wt
growth medium: YES
Growth protocol Strains AEP1 and AEP8 were grown in full medium (YES) with 0.03 µM queuine, where indicated. Strains AEP99 and AEP100 were grown in minimal medium (EMM). Cultures were inoculated at an OD600 of 0.2 and grown to an optical density of 1.0.
Extracted molecule total RNA
Extraction protocol Ribosome footprinting was performed essentially as described (Duncan and Mata, 2014; Ingolia et al., 2011). S. pombe cultures were grown at 30°C to an OD600 of 1.0, 150 µg/ml cycloheximide was added to the medium and cells were incubated for further 15 min at 30°C. Cells were harvested and flash-frozen immediately in liquid nitrogen. 15 OD of each sample was lysed by adding 100 µl lysis buffer (20 mM Tris-HCl pH 8.0, 150 mM NaCl, 5 mM MgCl2, 1% Triton X-100, 200µg/ml cycloheximide, 1% triton, protease inhibitor) and 1 g chilled glass beads (0.5 mm diameter). Samples were homogenized using a FastPrep-24 (MP Biomedicals) at level 6 for 13 seconds and subsequently diluted with 400 µl lysis buffer. Two centrifugation steps (1: 5 min, 4°C, 16000xg; 2: 15 min, 4°C, 16000xg) removed glass beads and cellular debris, respectively. For footprint isolation, 400 µl of the supernatants were digested with 4 U DNase I (ThermoScientific) and 800 U of RNase I (Ambion), for 45 minutes at room temperature with gentle shaking. 800 U of RNasin ribonuclease inhibitor (Promega) was added to quench the reaction. The samples were run on a 17.5 - 50% sucrose gradient to isolate monosomes. Footprint monosome RNAs were end-repaired with T4 polynucleotide kinase (TaKaRa), and size selected (28-31 nucleotides) on a 15% polyacrylamide Tris-borate-EDTA-urea gel. Total RNA was extracted from 100 µl lysate using TRIzol (Invitrogen) according to the manufacturers instructions.
Small RNA-seq: Small RNA libraries were constructed according to the protocol using NEB NEXT Small RNA library Prep Set for Illumina (Multiplex Compatible) E7330, and size-selected (120-170 base pairs) before sequencing. RNAseq: After quantification of total RNA and quality assessment on an Advanced Analytical Fragment Analyzer using the DNF-472 High Sensitivity RNA Analysis Kit (all Advanced Analytical Tech. Inc; Ankeny Iowa, U.S.A.), the mRNA was isolated from high quality total RNA extracts by using the NEBNext Poly(A) mRNA Magnetic Isolation Module (E7490). Illumina-compatible RNA-libraries were constructed by using the NEBNext Ultra RNALibrary Prep Kit for Illumina (E7530) as well as the NEBNext Multiplex Oligos for Illumina (E7335) following the distributors instruction manuals. Multiplexed RNA libraries were mixed in equilibrium according to their Qubit (Life Technologies) measurements, fragment distribution profiles on the Advanced Anayltical Fragment Analyzer and quantification of library 5'-and 3'- ends by Real Time PCR. For each library, 30 Mio clusters were sequenced in a 1x 75 base mode on a Illumina NextSeq500 instrument according to the manufacturer’s protocol and using the NextSeq 500/550 High Output Sequencing Kit v2 (75 cycles) (Product Code: FC-404-2005).
Library strategy ncRNA-Seq
Library source transcriptomic
Library selection size fractionation
Instrument model Illumina HiSeq 2000
Description processed data file:
Data processing After quality and adapter trimming (AGATCGGAAGAGCACACGTCT), reads were aligned to fission yeast tRNA (CCA-appended sequences from and, rRNA (, and mitochondrial tRNA and rRNA sequences (, using Bowtie allowing 2 mismatches, discarding any mapped reads from further analysis.
The remaining reads were aligned with Bowtie against cDNA sequences from, allowing 2 mismatches and using 23nt as seed region.
Reads of length 26-29 nt whose 5' end map from 15 nt downstream of the CDS start of a gene and 3' end map from 5 nt upstream of the CDS stop were assigned to that gene.
Codon occupancy was calculated as the codon proportions in the A-site (read start +15-16nt) divided by averaged codon proportions in the 3 codon sites up and dowstream of the ribosome.
For RNA-seq, processing was done similarly except that reads were kept at any mapping position and if read length was at least 25 nt.
Genome_build: ASM294v2
Supplementary_files_format_and_content: tab-delimited text files containing codon occupancy, footprint counts assigned to each CDS for all samples, and RNA-seq read counts assigned to each mRNA for all samples.
Submission date Aug 08, 2017
Last update date May 15, 2019
Contact name Ann E. Ehrenhofer-Murray
Organization name Humboldt-Universität zu Berlin
Department Institut für Biologie
Street address Philippstr. 13
City Berlin
ZIP/Postal code 10099
Country Germany
Platform ID GPL13988
Series (1)
GSE102376 Global fine-tuning of translation by queuosinylation and Dnmt2-dependent tRNA methylation
BioSample SAMN07462323
SRA SRX3073130

Supplementary data files not provided
SRA Run SelectorHelp
Raw data are available in SRA
Processed data are available on Series record

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