Figure 4

VgrG homologs encoded in SPI-21. (A) Schematic representation of three VgrG proteins encoded in SPI-21. Conserved protein domains are represented in color. (B) Homology between the C-terminal extension of SARI_02603 and Usp in UPEC strains. SARI_02603 [residues 841–1201 (1201 total)] and Usp [residues 241–593 (593 total)] were aligned using the multiple sequence alignment tool ClustalW2. Identical and conserved residues are indicated by shaded boxes. Consensus residues are indicated below alignment with an asterix. S-type pyocin and HNH domains are indicated in green and red color boxes, respectively.