Ribonuclease VapC2

UniProtKB accession:  Q4UNB2

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UniProtKB description:  Toxic component of a type II toxin-antitoxin (TA) system. Has ssRNase activity. Upon expression in E.coli or S.cerevisiae inhibits growth in liquid culture; in S.cerevisiae its expression leads to apoptosis-like characteristics. Rapidly induces apoptosis (within 2 hours) upon microinjection into mouse fibroblasts (L929 line); pretreatment of cells with dexamethasone protects them. Probably contributes to host cell death if bacterial cell lysis occurs during host infection. Its toxic effect is neutralized by coexpression with cognate antitoxin VapB2, its RNase activity is partially inhibited in vitro by VapB2 (PubMed:22046301).