Journal
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
Volume 22, Issue 7, Pages -Publisher
MDPI
DOI: 10.3390/ijms22073662
Keywords
48S complex assembly; translation initiation; m(6)A-modified RNA; toeprinting
Funding
- Russian Foundation for Basic Research [20-34-90047]
- Russian Science Foundation [19-74-20186]
- Russian Science Foundation [19-74-20186] Funding Source: Russian Science Foundation
Ask authors/readers for more resources
The study confirms that m(6)A-modified mRNAs can be translated under conditions of cap-dependent translation inhibition, but with lower translation initiation efficiency. Additionally, the translation elongation of m(6)A-mRNAs is slower.
The methylation of adenosine in the N-6 position (m(6)A) is a widely used modification of eukaryotic mRNAs. Its importance for the regulation of mRNA translation was put forward recently, essentially due to the ability of methylated mRNA to be translated in conditions of inhibited cap-dependent translation initiation, e.g., under stress. However, the peculiarities of translation initiation on m(6)A-modified mRNAs are not fully known. In this study, we used toeprinting and translation in a cell-free system to confirm that m(6)A-modified mRNAs can be translated in conditions of suppressed cap-dependent translation. We show for the first time that m(6)A-modified mRNAs display not only decreased elongation, but also a lower efficiency of translation initiation. Additionally, we report relative resistance of m(6)A-mRNA translation initiation in the absence of ATP and inhibited eIF4A activity. Our novel findings indicate that the scanning of m(6)A-modified leader sequences is performed by a noncanonical mechanism.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available