Mutational Analysis of the Antitoxin in the Lactococcal Type III Toxin-Antitoxin System AbiQ.


The lactococcal abortive phage infection mechanism AbiQ recently was classified as a type III toxin-antitoxin system in which the toxic protein (ABIQ) is regulated following cleavage of its repeated noncoding RNA antitoxin (antiQ). In this study, we investigated the role of the antitoxin in antiphage activity. The cleavage of antiQ by ABIQ was characterized… (More)
DOI: 10.1128/AEM.00572-15


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