Transcriptomics

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Cancer associated mRNAs regulated by the Helix Loop Helix motif of human EIF3A


ABSTRACT: Improper regulation of translation initiation, a vital check-point of protein synthesis in the cell, has been linked to a number of cancers. Overexpression of protein subunits of eukaryotic translation initiation factor 3 (eIF3) has been associated with increased translation of mRNAs involved in cell proliferation. In addition to playing a major role in general translation initiation by serving as a scaffold for the assembly of translation initiation complexes, eIF3 regulates translation of specific cellular mRNAs and viral RNAs. Mutations in the N-terminal Helix-Loop-Helix (HLH) RNA-binding motif of the EIF3A subunit in eIF3 interfere with Hepatitis C Virus Internal Ribosome Entry Site (IRES) mediated translation initiation in vitro. Here we use RNA-seq and ribosome profiling of engineered lentiviral HEK293T cells to show that the EIF3A HLH motif controls translation of a small set of cellular transcripts enriched in oncogenic mRNAs, including MYC.

ORGANISM(S): Homo sapiens

PROVIDER: GSE118239 | GEO | 2018/08/08

REPOSITORIES: GEO

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