Abstract：
:In this study we investigated the effect of uranium on the growth of the bacterium Thermus scotoductus strain SA-01 as well as the whole cell U(VI) reduction capabilities of the organism. Also, site-directed mutagenesis confirmed the identity of a protein capable of a possible alternative mechanism of U(VI) reduction. SA-01 can grow aerobically in up to 1.25 mM uranium and has the capability to reduce low levels of U(VI) in under 20 h. TEM analysis performed on cells exposed to uranium showed extracellular and membrane-bound accumulation of uranium. The reductase-like protein was surprisingly identified as a peptide ABC transporter, peptide-binding protein. This study showcases the concept of protein promiscuity, where this protein with a distinct function in situ can also have the unintended function of a reactant for the reduction of U(VI).
journal_name
Chemospherejournal_title
Chemosphereauthors
Cason ED,Piater LA,van Heerden Edoi
10.1016/j.chemosphere.2011.10.006subject
Has Abstractpub_date
2012-02-01 00:00:00pages
572-7issue
6eissn
0045-6535issn
1879-1298pii
S0045-6535(11)01147-7journal_volume
86pub_type
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