tailieunhanh - In search of the mRNA modification landscape in plants

Precise regulation of gene expression is indispensable for the proper functioning of organisms in both optimal and challenging conditions. The most commonly known regulative mechanisms include the modulation of transcription, translation and adjustment of the transcript, and protein half-life. | Chmielowska-Bạk et al. BMC Plant Biology 2019 19 421 https s12870-019-2033-2 REVIEW Open Access In search of the mRNA modification landscape in plants Check for updates Jagna Chmielowska-Bạk @ Magdalena Arasimowicz-Jelonek and Joanna Deckert Abstract Background Precise regulation of gene expression is indispensable for the proper functioning of organisms in both optimal and challenging conditions. The most commonly known regulative mechanisms include the modulation of transcription translation and adjustment of the transcript and protein half-life. New players have recently emerged in the arena of gene expression regulators - chemical modifications of mRNAs. Main text The latest studies show that modified ribonucleotides affect transcript splicing localization secondary structures interaction with other molecules and translation efficiency. Thus far attention has been focused mostly on the most widespread mRNA modification - adenosine methylation at the N6 position m6A . However initial reports on the formation and possible functions of other modified ribonucleotides such as cytosine methylated at the 5 position m5C 8-hydroxyguanosine 8-OHG and 8-nitroguanosine 8-NO2G have started to appear in the literature. Additionally some reports indicate that pseudouridine T is present in mRNAs and might perform important regulatory functions in eukaryotic cells. The present review summarizes current knowledge regarding the above-mentioned modified ribonucleotides m6A m5C 8-OHG 8-NO2G in transcripts across various plant species including Arabidopsis rice sunflower wheat soybean and potato. Conclusions Chemical modifications of ribonucleotides affect mRNA stability and translation efficiency. They thus constitute a newly discovered layer of gene expression regulation and have a profound effect on the development and functioning of various organisms including plants. Keywords RNA modifications Epitranscriptomics Methylation Oxidation Nitration Modified .

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