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Microbiology 153 (2007), 3055-3060; DOI  10.1099/mic.0.2007/009845-0
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Microbiology 153 (2007), 3055-3060; DOI  10.1099/mic.0.2007/009845-0
© 2007 Society for General Microbiology

The DUF81 protein TauE in Cupriavidus necator H16, a sulfite exporter in the metabolism of C2 sulfonates

Sonja Weinitschke, Karin Denger, Alasdair M. Cook and Theo H. M. Smits{dagger}

Department of Biology, The University, D-78457 Konstanz, Germany

Correspondence
Theo H. M. Smits
theo.smits{at}uni-konstanz.de

The degradation of taurine, isethionate and sulfoacetate in Cupriavidus necator (Ralstonia eutropha) H16 was shown by enzyme assays to be inducible, and each pathway involved sulfoacetaldehyde, which was subject to phosphatolysis by a common sulfoacetaldehyde acetyltransferase (Xsc, H16_B1870) to yield acetyl phosphate and sulfite. The neighbouring genes encoded phosphate acetyltransferase (Pta, H16_B1871) and a hypothetical protein [domain of unknown function (DUF)81, H16_B1872], with eight derived transmembrane helices. RT-PCR showed inducible transcription of these three genes, and led to the hypothesis that H16_B1872 and orthologous proteins represent a sulfite exporter, which was named TauE.

Abbreviations: DUF, domain of unknown function; SDH, sulfite dehydrogenase

{dagger}Present address: Agroscope Changins-Wädenswil, Division of Plant Protection, Schloss, CH-8820 Wädenswil, Switzerland.




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K. Denger, S. Weinitschke, T. H. M. Smits, D. Schleheck, and A. M. Cook
Bacterial sulfite dehydrogenases in organotrophic metabolism: separation and identification in Cupriavidus necator H16 and in Delftia acidovorans SPH-1
Microbiology, January 1, 2008; 154(1): 256 - 263.
[Abstract] [Full Text] [PDF]


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