Chromate-reducing properties of soluble flavoproteins from Pseudomonas putida and Escherichia coli

Article Abstract:

Cr(VI) chromate is a known environmental contaminant because of the widespread use of chromium compounds by tanning, corrosion control or plating industries but bacteria can reduce chromate to the insoluble and less toxic Cr(III), thus making chromate bioremediation a matter of great interest. Studies were conducted on chromate reductase activities of two electophoretically soluble bacterial flavoproteins.

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Analysis of novel soluble chromate and uranyl reductases and generation of an improved enzyme by directed evolution

Article Abstract:

Evolution of an enzyme, ChrR6, which shows a markedly enhanced capacity for remediating two of the most serious and prevalent U.S. Department of Energy (DOE) contaminants, chromate and uranyl is reported. Results demonstrate that CHrR6 makes Pseudomonas putida and Escherichia coli more efficient agents for bioremediation if the cellular permeability barrier to the metals is decreased.

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Purification to homogeneity and characterization of a novel Pseudomonas putida chromate reductase

Article Abstract:

A novel Pseudomonas putida chromate reductase has been purified to homogeneity to clone the chromate reductase-encoding gene and characterized. Bacterial chromate reductases can change soluble and toxic chromate to the insoluble and less toxic Cr(III) and Cr(VI) chromate is a widespread environmental contaminant.

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