Putative abortive phage resistance protein AbiGi, antitoxin
This is a bacterial family of proteins with unknown function. AbiGi is a family of putative type IV toxin-antitoxin system antitoxins. The AbiG abortive phage resistance system affects lactococcal bacteriophages phiP335 and phiQ30 but not the other P335 phage species. AbiGii toxin appears to confer resistance to phages by a mechanism of abortive infection that acts by interfering with phage RNA synthesis. The cognate toxin is found in pfam16873.
Jiyao W et al.(2023). "The conserved domain database in 2023.",