1996
DOI: 10.1126/science.271.5251.990
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Role of a Peptide Tagging System in Degradation of Proteins Synthesized from Damaged Messenger RNA

Abstract: Variants of lambda repressor and cytochrome b562 translated from messenger RNAs without stop codons were modified by carboxyl terminal addition of an ssrA-encoded peptide tag and subsequently degraded by carboxyl terminal-specific proteases present in both the cytoplasm and periplasm of Escherichia coli. The tag appears to be added to the carboxyl terminus of the nascent polypeptide chain by cotranslational switching of the ribosome from the damaged messenger RNA to ssrA RNA.

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Cited by 1,033 publications
(1,139 citation statements)
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“…4.5S RNA and Ffh protein constitute the signal recognition particle, which recognizes the signal sequence of new peptide synthesized by ribosome [16]. TmRNA has a tRNA analogous domain and a mRNA analogous domain, it can relieves synthesizing illegal mRNAs from ribosomes, and tags the synthesized illegal peptides with degradable signals [17][18].…”
Section: Introductionmentioning
confidence: 99%
“…4.5S RNA and Ffh protein constitute the signal recognition particle, which recognizes the signal sequence of new peptide synthesized by ribosome [16]. TmRNA has a tRNA analogous domain and a mRNA analogous domain, it can relieves synthesizing illegal mRNAs from ribosomes, and tags the synthesized illegal peptides with degradable signals [17][18].…”
Section: Introductionmentioning
confidence: 99%
“…However, certain plant-specific RNA viral genomes contain tRNA-like structures that can be specifically aminoacylated by valine, histidine and tyrosine, and this tRNA mimicry is important for diverse aspects of viral infectivity [29]. In bacteria, it plays a role in tagging abnormal proteins for proteolysis [30]. …”
Section: Discussionmentioning
confidence: 99%
“…Cela a pour conséquence : (1) de bloquer le ribosome (ainsi que le chapelet de ribosomes en amont sur le message en cours de traduction), empêchant ainsi leur recyclage sur d'autres ARNm à traduire ; (2) de produire un polypeptide incomplet qui reste bloqué sur l'ARNt dans le site P du ribosome ( Figure 3A). Afin de pallier ces défauts traductionnels, les bactéries ont développé un système de contrôle qualité de la synthèse protéique appelé trans-traduction, porté par un ARN particulier, l'ARN transfert-message ou ARNtm, hybride entre un ARN de transfert et un ARN messager ( Figure 3B) [8][9][10].…”
Section: Revuesunclassified