User:Cboursnell/Sandbox/Abi

This family consists of various hypothetical protein sequences for which the function is unknown.One of the proteins is an abortive infection protein that confers resistance to the Lactococcus phage 712. AbiG is an abortive infection (Abi) mechanism encoded by the conjugative plasmid pCI750 originally isolated from ''Lactococcus lactis subsp. cremoris'' (Streptococcus cremoris). The resistance mechanism acts at neither the phage adsorption or phage DNA restriction level.

Also in this family is a series of bacteriocin-like peptides PlnP, PlnI, PlnT, PlnP and PlnU from Lactobacillus plantarum C11 that secretes a small cationic peptide, plantaricin A, that serves as an induction signal for bacteriocin production as well as transcription of plnABCD. The plnABCD operon encodes the plantaricin A precursor (PlnA) itself and determinants (PlnBCD) for a signal transducing pathway.