U.S. flag

An official website of the United States government

Format

Send to:

Choose Destination

SRX1388234: GSM1919528: -rap-1; Saccharomyces cerevisiae; RNA-Seq
1 ILLUMINA (NextSeq 500) run: 18.9M spots, 2.8G bases, 1,001.1Mb downloads

Submitted by: NCBI (GEO)
Study: Identification of New Branch Points and Unconventional Introns in Saccharomyces cerevisiae
show Abstracthide Abstract
Spliced messages constitute one-fourth of expressed mRNAs in the yeast Saccharomyces cerevisiae, and most mRNAs in metazoans. Splicing requires 5'' splice site (5''SS), branch point (BP), and 3'' splice site (3''SS) elements, but the role of the BP in splicing control is poorly understood because BP identification remains difficult. We developed a high-throughput method, Branch-seq, to map BP and 5''SS of isolated RNA lariats. Applied to S. cerevisiae, Branch-seq detected 76% of expressed, annotated BPs and identified a comparable number of novel BPs. We used RNA-seq to confirm associated 3''SS locations, identifying some 200 novel splice junctions, including an AT-AC intron. We show that several yeast introns use two or even three different BPs, with effects on 3''SS choice, protein coding potential, or RNA stability and identify novel introns whose splicing changes during meiosis or in response to stress. Together, these findings reveal BP-based regulation and demonstrate unanticipated complexity of splicing in yeast. Overall design: 1 Lariat-seq experiment library. 3 barcoded Branch-seq libraries that make up one experiment. 26 RNA-seq samples, 2 biological replicates of each.
Sample: -rap-1
SAMN04217938 • SRS1136204 • All experiments • All runs
Library:
Instrument: NextSeq 500
Strategy: RNA-Seq
Source: TRANSCRIPTOMIC
Selection: cDNA
Layout: PAIRED
Construction protocol: RNA isolation for RNA-seq was performed as follows. RNA was isolated similar to Clarkson, B. K., Gilbert, W. V. & Doudna, J. A. Functional overlap between eIF4G isoforms in Saccharomyces cerevisiae. PLoS ONE 5, e9114 (2010). Pellets were resuspended in 1mL Acid Phenol and an equal volume of AES buffer (50mM NaAcetate pH 5.2, 10mM EDTA, 1% SDS) was added. In 2mL eppendorf tubes, samples were incubated at 65°C for 10 min with vortexing every minute. Samples were incubated on ice for 5 min and then transferred to a phaselock tube and one volume Cholrofom was added. After spinning, the top aqueous layer was transferred to a fresh phaselock tube and one volume of phenol:choloform:iaa (25:24:1) was added, tubes were spun, one volume of choloform was added, tubes were spun, and the aqueous layer was transferred to a fresh tube to be precipitated with 50uL 3M NaOAc (pH 5.5) and 550uL isopropenol. Samples were spun at max speed for 25 minutes at 4°C. The pellet was washed twice with 70% ethanol and resuspended in water. RNA was isolated using the hot acid phenol method and DNase treated with Turbo DNase. rRNA was subtracted using the Illumina Ribo-Zero Gold rRNA Removal Kit (Yeast). RNA was then fragmented and first strand cDNA was performed. Second strand synthesis was carried out using dUTP instead of dTTP to generate strand specific libraries. Subsequently adaptors ligation, uracil digestion, and PCR were performed. All libraries were barcoded and sequenced in one NextSeq lane. RNA-seq (Ribo-Zero, strand specific)
Experiment attributes:
GEO Accession: GSM1919528
Links:
Runs: 1 run, 18.9M spots, 2.8G bases, 1,001.1Mb
Run# of Spots# of BasesSizePublished
SRR283130918,934,3512.8G1,001.1Mb2016-08-01

ID:
1971956

Supplemental Content

Search details

See more...

Recent activity

Your browsing activity is empty.

Activity recording is turned off.

Turn recording back on

See more...