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 original function after modification by
His-tag. We established that protein TerC is membrane situated with
9 transmembrane domains and TerBDE are soluble cytosolic
proteins.We have identified the dimer formation of TerB, TerD and
TerE and interactions between TerD and TerE. The interaction
between TerB and TerD/TerE were also detected. In the last part of
this study we examined the response to oxidativ stress of TeR
strains and strains harboring different part of TeR operon. We have
also measured the total anitioxidant capacity of selected strains.
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