Unknown,Transcriptomics,Genomics,Proteomics

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Ribosome profiling of astrovirus-infected cells

ABSTRACT: Ribosome profiling (RiboSeq) is a high-throughput sequencing technique for globally mapping the positions of translating ribosomes on the transcriptome. We infected Caco2 cells with human astrovirus 1 (HAstV1). Cells were harvested at 12 hpi and either flash frozen with no pre-treatment (NT), or pre-treated with lactimidomycin for 30 minutes followed by flash freezing (LTM). These samples where then used for ribosome profiling.

INSTRUMENT(S): NextSeq 500

ORGANISM(S): Homo sapiens

SUBMITTER: Andrew Firth

PROVIDER: E-MTAB-8045 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Project description:Cell lines derived from Chlorocebus sabaeus kidney were infected with an isolate of PRRSV-1 or PRRSV-2 and ribosome profiling was performed (this entry) in parallel with RNASeq (see related accession number). These datasets were used to analyse the viral and host translatome, frameshifting on the viral genome, and putative frameshift-related ribosome pausing events. For the PRRSV-1 experiments, MA-104 cells were infected with an isolate based on the Porcilis vaccine strain (KJ127878.1 but with several accumulated mutations, see associated publication) and harvested at 8 hpi after pre-treatment with cycloheximide (CHX). For the PRRSV-2 experiments, MARC-145 cells were infected with SD95-21 PRRSV (KC469618.1), and a mutant thereof (KO2). One group of samples was harvested at 9 hpi after pre-treatment with CHX, and another group of samples was harvested at 3, 6, 9 and 12 hpi by flash-freezing without CHX pre-treatment. For all samples, RNase I treatment was carried out, following which ribosomes and enclosed RNA were isolated by centrifugation through a sucrose cushion. RNA was extracted, ribosomal RNA was removed using Illumina's RiboZero kit, and remaining RNA was gel purified to select fragments 25-34 nt (PRRSV-1-infected samples, CHX-pre-treated PRRSV-2- or mock-infected samples, and non-CHX-pre-treated PRRSV-2- or mock-infected 9 hpi replicate one samples) or 19-34 nt long (all other samples). Fragments were cloned into adapters based on the TruSeq small RNA adapters. For all PRRSV-2-infected (or mock-infected) libraries, adapters with an additional seven random nucleotides at the 5′-end of the 3′-adapter and the 3′-end of the 5′-adapter were used. For PRRSV-1 replicate one, no random nucleotides were present on the adapters, and for PRRSV-1 replicate two, 14 random nucleotides were present at the 5′-end of the 3′-adapter. Libraries were sequenced on the Illumina NextSeq 500 platform as a single-end run. Non-CHX-pre-treated PRRSV-2-infected 9 hpi replicate two libraries were uploaded under a separate accession number due to differences in the size selection and sequencing protocol - see associated paired-end entry. Note that sample nomeclature (including replicate numbers) is consistent between this and the two related accessions, and RiboSeq libraries are matched with RNASeq libraries, which were prepared from the same lysate. The noCHX_Ribo_9hpi_mock_3 library is deliberately absent as this was a poor quality library.

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Ribosome profiling of astrovirus-infected cells

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