Antitoxin CcdA
UniProtKB accession: P62553
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Go to UniProtKB: P62553
UniProtKB description: Antitoxin component of a type II toxin-antitoxin (TA) system which inhibits the post-segregational killing (PSK) of plasmid-free cells, also referred to as a plasmid addiction system. Binds to and blocks the activity of CcdB; will also remove bound CcdB protein from the CcdB-GyrA complex by forming a CcdA-CcdB complex, a process termed rejuvenation. Functions as a transcriptional corepressor for the ccdAB operon, repression also requires CcdB (By similarity).
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