SmpB as the handyman of tmRNA during trans-translation
نویسندگان
چکیده
منابع مشابه
SmpB as the handyman of tmRNA during trans-translation.
In the recent years, a wealth of genetic, biochemical and structural data focusing on various steps of bacterial trans-translation was reported. The early events, from stalled ribosome recognition, pre-accommodation to translocation have been recently investigated in great details. In comparison, the later events including 'elongation-termination' onto tmRNA reading frame and ribosome recycling...
متن کاملtRNA/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 radic...
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Ribosome stalling is a serious issue for cell survival. In bacteria, the primary rescue system is trans-translation, performed by tmRNA and its protein partner small protein B (SmpB). Since its discovery almost 20 years ago, biochemical, genetic, and structural studies have paved the way to a better understanding of how this sophisticated process takes place at the cellular and molecular levels...
متن کاملEnds of the line for tmRNA-SmpB
Genes for the RNA tmRNA and protein SmpB, partners in the trans-translation process that rescues stalled ribosomes, have previously been found in all bacteria and some organelles. During a major update of The tmRNA Website (relocated to http://bioinformatics.sandia.gov/tmrna), including addition of an SmpB sequence database, we found some bacteria that lack functionally significant regions of S...
متن کاملSmpB functions in various steps of trans-translation.
tmRNA has a dual function as a tRNA and an mRNA to facilitate trans-translation, in which a ribosome can switch between translation of a truncated mRNA and the tmRNA's tag sequence. SmpB is a tmRNA binding protein that has been identified to be essential for trans-translation in vivo. To further study the function of SmpB, an S30 fraction from an Escherichia coli strain, in which the set of gen...
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ژورنال
عنوان ژورنال: RNA Biology
سال: 2011
ISSN: 1547-6286,1555-8584
DOI: 10.4161/rna.8.3.15387