Occurrence of two structural types of mercury reductases among Gram-positive bacteria |
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Authors: | E.S. Bogdanova S.Z. Mindlin |
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Affiliation: | Institute of Molecular Genetics, U.S.S.R. Academy of Sciences, Moscow. |
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Abstract: | Structural variants of mercury reductase containing the N-terminal domain, which is easily cleaved by trypsin, have been found in Gram-positive bacteria with a low genomic G + C content (Bacillus, Staphylococcus and, possibly, some other genera). Mercury reductases without the N-terminal domain and relatively resistant to limited proteolysis are typical for Gram-positive bacteria with a high genomic G + C content (Arthrobacter, Citreobacterium, Micrococcus, Mycobacterium, Rhodococcus). Both types of mercury reductase genes may be located on plasmids. |
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Keywords: | Mercury reductase Enzyme evolution Phylogenetic groups of bacteria |
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