Fig. 5

Phylogenetic analysis of putative TpsA proteins of X. innexi. For each family of TpsA proteins, a phylogenetic tree was built by the maximum likelihood (ML) method using the LG substitution model. Branch support values, estimated by the aLRT (SH-like) method, are indicated at the nodes. The branch length scale bar below the phylogenetic tree reflects the number of amino-acid substitutions per site. TpsA proteins fall into three clusters: a Cluster I containing CdiA exoproteins, which are involved in contact-dependent inhibition systems, b Cluster II containing hemolysins and (c) Cluster III containing TpsA proteins with unknown functions, which are all characterized by the presence of DUF637 domain. TpsA are identified by the name of the bacterial strain in each cluster and the label number in the Photorhabdus and Xenorhabdus genera. The X. innexi TpsA proteins are indicated in blue with the label number of their encoding gene. Previous functionally characterized TpsA are named in parentheses. Accession numbers of the sequences are indicated in Additional file 6