Unknown,Transcriptomics,Genomics,Proteomics

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RNA 5'end sequencing in polysome profiling fractions


ABSTRACT: It has been shown that in mammalian cells alternative transcription initiation is extensively regulated during development and across cell-types, which confers dynamic transcript 5’UTR repertoire. However it is underexplored how the heterogeneity of 5’UTR isoforms would affect the downstream steps for protein expression, such as translation. To this end, we globally compared the translational profile of distinct mRNA TSS isoforms in mouse fibroblast cells, by combining deep-sequencing based mRNA 5’ends profiling and polysome fractionation. We demonstrated the extensive translation regulation conferred by TSS heterogeneity. 5'end sequencing in seven polysome fractions, in two replicates, using Illumina Hiseq2000

ORGANISM(S): Mus musculus

SUBMITTER: Wei Chen 

PROVIDER: E-GEOD-78241 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Pervasive isoform-specific translational regulation via alternative transcription start sites in mammals.

Wang Xi X   Hou Jingyi J   Quedenau Claudia C   Chen Wei W  

Molecular systems biology 20160718 7


Transcription initiated at alternative sites can produce mRNA isoforms with different 5'UTRs, which are potentially subjected to differential translational regulation. However, the prevalence of such isoform-specific translational control across mammalian genomes is currently unknown. By combining polysome profiling with high-throughput mRNA 5' end sequencing, we directly measured the translational status of mRNA isoforms with distinct start sites. Among 9,951 genes expressed in mouse fibroblast  ...[more]

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