Cadmium adsorption by E. coli with surface displayed CadR

摘要

CadR is a metal-binding protein first isolated from rhizobacterium Pseudomonas putida and specifically recognizes Cd2+. Escherichia coli cells surface engineered with CadR shows a high Cd2+ adsorption capacity of 19.5 mu mol g(-1) cells. The surface engineered Escherichia coli cells also show higher tolerance towards cadmium contamination for up to 100 mM and could potentially be utilized as a bio-remediation treatment of cadmium contamination.