5'-UTR RNA G-quadruplexes: translation regulation and targeting.

Nucleic Acids Research
Anthony Bugaut, Shankar Balasubramanian

Abstract

RNA structures in the untranslated regions (UTRs) of mRNAs influence post-transcriptional regulation of gene expression. Much of the knowledge in this area depends on canonical double-stranded RNA elements. There has been considerable recent advancement of our understanding of guanine(G)-rich nucleic acids sequences that form four-stranded structures, called G-quadruplexes. While much of the research has been focused on DNA G-quadruplexes, there has recently been a rapid emergence of interest in RNA G-quadruplexes, particularly in the 5'-UTRs of mRNAs. Collectively, these studies suggest that RNA G-quadruplexes exist in the 5'-UTRs of many genes, including genes of clinical interest, and that such structural elements can influence translation. This review features the progresses in the study of 5'-UTR RNA G-quadruplex-mediated translational control. It covers computational analysis, cell-free, cell-based and chemical biology studies that have sought to elucidate the roles of RNA G-quadruplexes in both cap-dependent and -independent regulation of mRNA translation. We also discuss protein trans-acting factors that have been implicated and the evidence that such RNA motifs have potential as small molecule target. Finally, we close...Continue Reading

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Methods Mentioned

BETA
X-ray
NMR
circular dichroism
footprinting
GTPase
immunoprecipitation
FRET

Software Mentioned

Ensembl
CLIP
SEQ

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