Fig. 7

The icmF gene encodes frameshift mutations in different species. A the gene structure comparison of T6SS-C in three Enterobacter cancerogenus strains and T6SS gene cluster in Citrobacter rodentium ICC168. The percentage means the amino acid sequence identity. B Representation of the nucleotide sequences of five strains encoding icmF protein. The poly-A tract is shown in red. The codons and the translation result are shown, as well as those mutations produced from frameshifting are indicated (stop codon marked by the asterisks) with their corresponding size. C Prediction of the conserved domain of the PAAR domain-containing protein in T6SS-C