This family represents a BlyA, a small holin found in Borrelia circular plasmids that prove to be temperate phage. This protein was previously proposed to be an hemolysin. BlyA is small (67 residues) and contains two largely hydrophobic helices and a highly charged C-terminus. [Mobile and extrachromosomal element functions, Prophage functions]
Jiyao W et al.(2023). "The conserved domain database in 2023.",