This family, found in various bacterial species, contains sequences that are similar to the Abi group of proteins, which are involved in bacteriophage resistance mediated by abortive infection in Lactococcus species. The proteins are thought to have helix-turn-helix motifs, found in many DNA-binding proteins, allowing them to perform their function.
Jiyao W et al.(2023). "The conserved domain database in 2023.",