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Bacteria use trans‐translation to rescue stalled ribosomes and target incomplete proteins for proteolysis. Despite similarities between tRNAs and transfer‐messenger RNA (tmRNA), the key molecule for trans‐translation, new structural and biochemical data show important differences between translation and trans‐translation at most steps of the pathways. tmRNA and its binding partner, SmpB, bind in the...
Bacterial toxin–antitoxin systems are important factors implicated in growth inhibition and plasmid maintenance. Type II toxin–antitoxin pairs are regulated at the transcriptional level by the antitoxin itself. Here, we examined how the HigA antitoxin regulates the expression of the Proteus vulgaris higBA toxin–antitoxin operon from the Rts1 plasmid. The HigBA complex adopts a unique architecture...
Toxin–antitoxin genes play important roles in the regulation of bacterial growth during stress. One response to stress is selective proteolysis of antitoxin proteins which releases their cognate toxin partners causing rapid inhibition of growth. The features of toxin–antitoxin complexes that are important to inhibit toxin activity as well as to release the active toxin remain elusive. Furthermore,...
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