Surface proteins in Gram-positive bacteria are often involved in biofilm formation, host-cell interactions, and surface attachment. Here we review a protein module found in surface proteins that are often encoded on various mobile genetic elements like conjugative plasmids. This module binds to different types of polymers like DNA, lipoteichoic acid and glucans, and is here termed polymer adhesin domain. We analyze all proteins that contain a polymer adhesin domain and classify the proteins into distinct classes based on phylogenetic and protein domain analysis. Protein function and ligand binding show class specificity, information that will be useful in determining the function of the large number of so far uncharacterized proteins containing a polymer adhesin domain.
Bibliographical noteFunding Information:
This work was supported by grants from the Swedish Research Council (2016–03599), Knut and Alice Wallenberg Foundation and Kempestiftelserna (SMK-1869) to RB, and NIH grant R35 GM11807 to GD.
© Copyright © 2020 Järvå, Hirt, Dunny and Berntsson.