FIGURE 2.

Model of the structural organization of Clade 1 T4P system. Hypothetical generalized model of clade 1 T4P system organization. A representative locus from Thermococcus is selected to show minor and major pilin by the colors corresponding to the model. The genes of a representative locus are shown by arrows. The scale of an arrow is roughly proportional to gene length. The arrow indicates direction of the respective gene. The red triangles above an arrow denote genes that encode FlaFind positive arCOG members. The blue triangles above an arrow denote genes that encode proteins predicted to be secreted. Small blue square with a number inside indicates a protein with corresponding number of TM domains. Color code for the genes is the following: secretion ATPases – orange, FleN/MinD family ATPase – bright yellow, TadC-like proteins – brown, major and minor pilin – magenta shades, adhesins – purple, prepilin signal peptidase – green; S-layer-like proteins are dark blue; Genes with no prediction of function but possible components of the system are white with red outline. For each component of this T4P system all arCOG families from all species corresponding to this component are listed.