Mechanisms of Metal Resistance and Homeostasis in Haloarchaea
Figure 2
Arsenic resistance is determined by the presence of ars operon, which codes for an arsenite P1-type ATPases transporter ArsA/ArsB, an arsenate reductase ArsC, and arsenite responsive repressors ArsD and ArsR. The arsADRC and arsR2M operons are present on the plasmid in haloarchaeon Halobacterium sp. strain NRC-1 (a). The acidophilic bacterium Acidithiobacillus ferrooxidans has chromosomally encoded arsCRBH (b). The unique feature of these operons is the bidirectional nature transcription.
