This protein is observed in operons extremely similar to that characterized in E. coli K-12 responsible for the import and catabolism of pyrimidines, primarily uracil. This protein is a member of the uracil-xanthine permease family defined by TIGR00801. As well as the The Nucleobase:Cation Symporter-2 (NCS2) Family (TC 2.A.40).