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Biomolecules 2017, 7(1), 7; doi:10.3390/biom7010007

Trm112, a Protein Activator of Methyltransferases Modifying Actors of the Eukaryotic Translational Apparatus

Laboratoire de Biochimie, Ecole polytechnique, CNRS, Université Paris-Saclay, 91128 Palaiseau CEDEX, France
De Duve Institute, Université Catholique de Louvain, avenue Hippocrate 75, 1200 Brussels, Belgium
Author to whom correspondence should be addressed.
Academic Editor: Valérie de Crécy-Lagard
Received: 13 December 2016 / Revised: 16 January 2017 / Accepted: 18 January 2017 / Published: 27 January 2017
(This article belongs to the Special Issue tRNA Modifications: Synthesis, Function and Beyond)
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Post-transcriptional and post-translational modifications are very important for the control and optimal efficiency of messenger RNA (mRNA) translation. Among these, methylation is the most widespread modification, as it is found in all domains of life. These methyl groups can be grafted either on nucleic acids (transfer RNA (tRNA), ribosomal RNA (rRNA), mRNA, etc.) or on protein translation factors. This review focuses on Trm112, a small protein interacting with and activating at least four different eukaryotic methyltransferase (MTase) enzymes modifying factors involved in translation. The Trm112-Trm9 and Trm112-Trm11 complexes modify tRNAs, while the Trm112-Mtq2 complex targets translation termination factor eRF1, which is a tRNA mimic. The last complex formed between Trm112 and Bud23 proteins modifies 18S rRNA and participates in the 40S biogenesis pathway. In this review, we present the functions of these eukaryotic Trm112-MTase complexes, the molecular bases responsible for complex formation and substrate recognition, as well as their implications in human diseases. Moreover, as Trm112 orthologs are found in bacterial and archaeal genomes, the conservation of this Trm112 network beyond eukaryotic organisms is also discussed. View Full-Text
Keywords: post-transcriptional modification; RNA modifying enzyme; methyltransferase; S-adenosyl-l-methionine; translation post-transcriptional modification; RNA modifying enzyme; methyltransferase; S-adenosyl-l-methionine; translation

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Bourgeois, G.; Létoquart, J.; van Tran, N.; Graille, M. Trm112, a Protein Activator of Methyltransferases Modifying Actors of the Eukaryotic Translational Apparatus. Biomolecules 2017, 7, 7.

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