This entry identifies a family of proteins, which are about 100 amino acids in length, including a predicted signal sequence and a perfectly conserved motif RAQPRD towards the C terminus. Members are found in the Pseudomonas putida TOL plasmid pWW0 and in cryptic plasmid regions of Salmonella enterica subsp. enterica serovar Typhi and Pseudomonas syringae DC3000. The function of these proteins are unknown.