Literature DB >> 1429454

The terminal reductases for selenate and nitrate respiration in Thauera selenatis are two distinct enzymes.

S A Rech1, J M Macy.   

Abstract

A number of approaches have been used to show that a recently isolated selenate-respiring bacterium, Thauera selenatis, is able to synthesize both a selenate reductase (SR) and a nitrate reductase (NR). (i) The pH optimum of the SR was found to be 6.0; that of the NR was 7.0. (ii) The presence of nitrate did not inhibit selenate reduction in selenate-grown cells. (iii) In cell extracts, the highest SR or NR activity was observed in cells grown with the respective electron acceptor. (iv) Mutants that were unable to grow with nitrate as the terminal electron acceptor and lacked NR activity were isolated; these mutants grew normally with selenate and synthesized SR. (v) The SR was found in the periplasmic space of the cell, whereas the NR was present in the cytoplasmic membrane. A hypothetical electron transport system involving the SR is described.

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Year:  1992        PMID： 1429454      PMCID： PMC207426          DOI： 10.1128/jb.174.22.7316-7320.1992

Source DB:  PubMed          Journal:  J Bacteriol        ISSN： 0021-9193            Impact factor:   3.490


  10 in total

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Authors:  D T Maiers; P L Wichlacz; D L Thompson; D F Bruhn
Journal:  Appl Environ Microbiol       Date:  1988-10       Impact factor: 4.792
  10 in total
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5.  Pilot-Scale Selenium Bioremediation of San Joaquin Drainage Water with Thauera selenatis.

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7.  Structural and spectral features of selenium nanospheres produced by Se-respiring bacteria.

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Review 8.  The role of soils in the disposition, sequestration and decontamination of environmental contaminants.

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9.  Production of selenium nanoparticles in Pseudomonas putida KT2440.

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  9 in total

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