Tellurite resistance (TeR) determinat from uropathogenic strain Escherichia coli KL53 is harbored on conjugative plasmid pTE53, which consists of two clusters of ter genes. The first cluster of genes is responsible for the TeR terZABCDEF and protective region consists of terXYW. Only four genes terBCDE are essential for TeR and these genes were object of our study. The expression, purification and evaluation ATPase activity of the tellurite resistance operon is a part of our work. We have identified that C-terminus of these proteins is crucial for maintain of their function due to loss of...