tRNA/mRNA Mimicry by tmRNA and SmpB in Trans-Translation.

Since accurate translation from mRNA to protein is critical to survival, cells have developed translational quality control systems. Bacterial ribosomes stalled on truncated mRNA are rescued by a system involving tmRNA and SmpB referred to as trans-translation. Here, we review current understanding of the mechanism of trans-translation. Based on results obtained by using directed hydroxyl radical probing, we propose a new type of molecular mimicry during trans-translation. Besides such chemical approaches, biochemical and cryo-EM studies have revealed the structural and functional aspects of multiple stages of trans-translation. These intensive works provide a basis for studying the dynamics of tmRNA/SmpB in the ribosome.

Citation

Daisuke Kurita, Akira Muto, Hyouta Himeno. tRNA/mRNA Mimicry by tmRNA and SmpB in Trans-Translation. Journal of nucleic acids. 2011;2011:130581

PMID: 21253384

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