NAD(+) phosphorylase MbcT

UniProtKB accession:  P9WLP9

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UniProtKB description:  Toxic component of a type II toxin-antitoxin (TA) system. Neutralized by cognate antitoxin MbcA (PubMed:30315706, PubMed:30792174). Degrades NAD(+) by phosphorolysis. Expression in the absence of its cognate antitoxin MbcA causes dramatic reduction of intracellular NAD(+) levels and is deleterious to cell growth, causing cell death. In a SCID mouse infection model, mice infected with bacteria overexpressing this protein survive longer. Overexpression of this protein in a mouse infection model at 21 days leads to bacterial death, and shows a synergistic 100-fold increase in mouse survival when combined with isoniazid treatment (PubMed:30792174).