Figure 8From: Novel insights into the genomic basis of citrus canker based on the genome sequences of two strains of Xanthomonas fuscans subsp. aurantifoliiThe chromosomal T4SS gene cluster in XAC. (A) This T4SS cluster is located between regions XACSR12 and XACSR13. Genes shared with XauB and XauC are shown with a black asterisk. Two of the genes are shared only by XAC and XauB (red asterisk). (B) Interactions among T4SS proteins, based on data presented by Alegria et al. [77]. Proteins specific to XAC are represented in yellow, and proteins shared by XAC, XauB and XauC are represented in orange. Six of the proteins colored in yellow are in XAC-specific regions. Genes XAC0095 and XAC0096, although not part of XAC-specific regions, seem to play an especially important role in pathogenicity. Under this model the protein coded for by XAC0095 interacts with HrpG, a protein that participates in the T3SS apparatus [41], and that causes phenotypic changes when its gene is mutated [31]. The product of gene XAC0096, which is next to XAC0095, interacts wirth VirD4, a component of the T4SS [77].Back to article page