The putative holin-like toxin (Hol-Tox) family (TC# 1.E.42) consists of many small proteins, between 34 and 48 amino acyl residues (aas) with a single transmembrane segment (TMSs).
Rajesh et al. (2011) first identified the gene and designated it tmp1, which coded for a 34 amino acyl peptide that acts as an antibacterial agent on gram-positive bacteria.
[1] This peptide exhibits a single transmembrane domain (TMD) that is believed to play a role in facilitating the antibacterial activity.
[1] A representative list of proteins belonging to the Hol-Tox family can be found in the Transporter Classification Database.
[2] As of this edit, this article uses content from "1.E.42 The Putative Holin-like Toxin (Hol-Tox) Family", which is licensed in a way that permits reuse under the Creative Commons Attribution-ShareAlike 3.0 Unported License, but not under the GFDL.