Can I read A Novel Bacterial Sulfur Oxidation Pathway Provides a New Link Between the Cycles of Organic and Inorganic Sulfur Compounds on EtoBox?

A Novel Bacterial Sulfur Oxidation Pathway Provides a New Link Between the Cycles of Organic and Inorganic Sulfur Compounds by Tobias Koch; Christiane Dahl is a Environmental Science article available to read on EtoBox.

What is A Novel Bacterial Sulfur Oxidation Pathway Provides a New Link Between the Cycles of Organic and Inorganic Sulfur Compounds about?

Dimethylsulfide (DMS) plays a globally significant role in carbon and sulfur cycling and impacts Earth's climate because its oxidation products serve as nuclei for cloud formation. While the initial steps of aerobic DMS degradation and the fate of its carbon atoms are reasonably well documented, oxidation of the contained sulfur is largely unexplored. Here, we identified a novel pathway of sulfur compound oxidation in the ubiquitously occurring DMS-degrader Hyphomicrobium denitrificans X that links the oxidation of the volatile organosulfur compound with that of the inorganic sulfur compound thiosulfate. DMS is first transformed to methanethiol from which sulfide is released and fully oxidized to sulfate. Comparative proteomics indicated thiosulfate as an intermediate of this pathway and pointed at a heterodisulfide reductase (Hdr)-like system acting as a sulfur-oxidizing entity. Indeed, marker exchange mutagenesis of hdr-like genes disrupted the ability of H. denitrificans to metabolize DMS and also prevented formation of sulfate from thiosulfate provided as an additional electron source during chemoorganoheterotrophic growth. Complementation with the hdr-like genes under a consti

Who reads A Novel Bacterial Sulfur Oxidation Pathway Provides a New Link Between the Cycles of Organic and Inorganic Sulfur Compounds?

Author

Tobias Koch; Christiane Dahl

Publisher

Springer Science and Business Media LLC

Published

2018

Language

EN

Field

Environmental Science (Physical Sciences)