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SRX24744532: GSM8295805: bacteria, OD1, subculture, WT R1; Staphylococcus aureus; RNA-Seq
1 ILLUMINA (Illumina HiSeq 3000) run: 46.9M spots, 14.1G bases, 5.4Gb downloads

External Id: GSM8295805_r1
Submitted by: PRINCE LAB, PEDIATRICS ID, COLUMBIA UNIVERSITY
Study: Staphylococcus aureus adapts to exploit collagen-derived proline during chronic infection
show Abstracthide Abstract
Staphylococcus aureus is a pulmonary pathogen associated with substantial human morbidity and mortality. As vaccines targeting virulence determinants have failed to be protective in humans, other factors are likely involved in pathogenesis. Here we analysed transcriptomic responses of human clinical isolates of S. aureus from initial and chronic infections. We observed upregulated collagenase and proline transporter gene expression in chronic infection isolates. Metabolomics of bronchiolar lavage fluid, fibroblast infection, growth assays and analysis of bacterial mutant strains showed that airway fibroblasts produce collagen during S. aureus infection. Host-adapted bacteria upregulate collagenase, which degrades collagen and releases proline. S. aureus then imports proline, which fuels oxidative metabolism via the tricarboxylic acid cycle. Proline metabolism provides host-adapted S. aureus with a metabolic benefit enabling out-competition of non-adapted strains. These data suggest that clinical settings characterized by airway repair processes and fibrosis provide a milieu that promotes S. aureus adaptation and supports infection. Overall design: S. aureus was grown to OD1 in LB plus/minus 100uM proline. RNA was extracted and DNAse treatment performed. RNA was sent for sequencing. ------------------ Azenta Life Sciences
Sample: bacteria, OD1, subculture, WT R1
SAMN41592608 • SRS21466545 • All experiments • All runs
Library:
Name: GSM8295805
Instrument: Illumina HiSeq 3000
Strategy: RNA-Seq
Source: TRANSCRIPTOMIC
Selection: cDNA
Layout: PAIRED
Construction protocol: Bacterial pellets were incubated in a cell wall lysis mixture TE buffer pH 8 (30 mMTris, 1mMEDTA, 15 mg/mL and 200μg/mL proteinase K) containing mutanolysin, lysostaphin and lysozyme at 37 °C for 30 minutes. TRK lysis buffer and 70% ethanol were added to each sample, prior to transferring to E.Z.N.A RNA isolation columns. RNA was isolated following the manufacturer's instructions and DNA was selectively degraded using the DNA-free DNA removal kit.The RNA was precipitated with 0.1 volume 3 M sodium acetate (ThermoFisher #S209) and 3 volumes of 100% ethanol, recovered by centrifugation and washed with ice cold 70% ethanol. A ribosomal RNA-depleted cDNA library was prepared according to the manufacturer's instructions using the Universal Prokaryotic RNA-Seq Prokaryotic AnyDeplete kit (NuGEN #0363-32) and sequenced with Illumina HiSeq. Raw base calls were converted to fatsq files using Bcl2fastqs. Filtered reads were aligned to the Newman (Refseq NC_009641.1) reference genome using STAR-Aligner v2.7.3a. The mapped reads were annotated for read groups and marked for duplicates using the Picard tools v2.22.3.
Runs: 1 run, 46.9M spots, 14.1G bases, 5.4Gb
Run# of Spots# of BasesSizePublished
SRR2922513546,929,33214.1G5.4Gb2024-07-31

ID:
33063874

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