The S4-intermediate pathway for the oxidation of thiosulfate by the chemolithoautotroph Tetrathiobacter kashmirensis and inhibition of tetrathionate oxidation by sulfite

Dam, Bomba; Mandal, Sukhendu; Ghosh, Wriddhiman; Gupta, S. K.; Roy, Pranab

doi:10.1016/j.resmic.2006.12.013

Cited by 57 publications

(55 citation statements)

References 33 publications

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“…The most recently proposed mechanism was described for the bacterium Tetrathiobacter kashmirensis (Dam et al, 2007). In this case, a periplasmic oxidation system performs the oxidation of thiosulfate to tetrathionate, whereas the complete oxidation of tetrathionate occurs on the membrane.…”

Section: Mechanisms Of S Oxidation In Bacteriamentioning

confidence: 99%

“…In this case, a periplasmic oxidation system performs the oxidation of thiosulfate to tetrathionate, whereas the complete oxidation of tetrathionate occurs on the membrane. Sulfite is oxidized in the cytoplasm by a sulfite dehydrogenase, which involves a ubiquinonecytochrome b-mediated transfer of electrons to oxygen (Dam et al, 2007;Ghosh & Dam, 2009). …”

Section: Mechanisms Of S Oxidation In Bacteriamentioning

confidence: 99%

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Sulfur in agriculture

Lucheta¹,

Lambais

2012

Rev. Bras. Ciênc. Solo

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SUMMARYSulfur (S) deficiency in soils is becoming increasingly common in many areas of the world as a result of agronomic practices, high biomass exportation and reduced S emissions to the atmosphere. In this review, the incidence and commercial exploitation of S pools in nature are discussed, as well as the importance of S for plants and the organic and inorganic S forms in soil and their transformations, especially the process of microbiological oxidation of elemental sulfur (S 0 ) as an alternative to the replenishment of S levels in the soil. The diversity of S 0 -oxidizing microorganisms in soils, in particular the genus Thiobacillus, and the biochemical mechanisms of S 0 oxidation in bacteria were also addressed. Finally, the main methods to measure the S 0 oxidation rate in soils and the variables that influence this process were revised.Index terms: fertilization, agriculture, microbial diversity, soil fertility. RESUMO: ENXOFRE NA AGRICULTURA A deficiência de enxofre (S) nos solos vem se tornando cada vez mais comum em várias áreas do mundo em razão de práticas agronômicas, alta exportação de biomassa e redução das emissões atmosféricas. Nesta revisão são abordados a incidência, a exploração comercial e estoques de S na natureza, a importância do S para as plantas, as formas orgânicas e inorgânicas no solo e suas transformações, assim como, principalmente, o processo de oxidação microbiológica do enxofre elementar (S 0 ) como alternativa para a reposição dos níveis de S do solo. Também é abordada a diversidade de microrganismos oxidantes de S

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Section: Mechanisms Of S Oxidation In Bacteriamentioning

confidence: 99%

Section: Mechanisms Of S Oxidation In Bacteriamentioning

confidence: 99%

Sulfur in agriculture

Lucheta¹,

Lambais

2012

Rev. Bras. Ciênc. Solo

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“…The type strain was isolated from a temperate orchard soil (Ghosh et al, 2005), and has been recognized as a thiosulfate-and tetrathionate-oxidizing facultative chemolithotroph (Dam et al, 2007). Several isolated soil-dwelling strains of A.…”

Section: Introductionmentioning

confidence: 99%

Unravelling the complete genome sequence of Advenella mimigardefordensis strain DPN7T and novel insights in the catabolism of the xenobiotic polythioester precursor 3,3′-dithiodipropionate

et al. 2014

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Advenella mimigardefordensis strain DPN7 T is a remarkable betaproteobacterium because of its extraordinary ability to use the synthetic disulfide 3,39-dithiodipropionic acid (DTDP) as the sole carbon source and electron donor for aerobic growth. One application of DTDP is as a precursor substrate for biotechnically synthesized polythioesters (PTEs), which are interesting nondegradable biopolymers applicable for plastics materials. Metabolic engineering for optimization of PTE production requires an understanding of DTDP conversion. The genome of A. mimigardefordensis strain DPN7 T was sequenced and annotated. The circular chromosome was found to be composed of 4 740 516 bp and 4112 predicted ORFs, whereas the circular plasmid consisted of 23 610 bp and 24 predicted ORFs. The genes participating in DTDP catabolism had been characterized in detail previously, but knowing the complete genome sequence and with support of Tn5 : : mob-induced mutants, putatively involved transporter proteins and a transcriptional regulator were also identified. Most probably, DTDP is transported into the cell by a specific tripartite tricarboxylate transport system and is then cleaved by the disulfide reductase LpdA, sulfoxygenated by the 3-mercaptopropionate dioxygenase Mdo, activated by the CoA ligase SucCD and desulfinated by the acyl-CoA dehydrogenase-like desulfinase AcdA. Regulation of this pathway is presumably performed by a transcriptional regulator of the xenobiotic response element family. The excessive sulfate that is inevitably produced is secreted by the cells by a unique sulfate exporter of the CPA (cation : proton antiporter) superfamily.

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“…These bacterial species oxidize thiosulfate through the formation of a tetrathionate intermediate (known as the S 4 intermediate pathway) (9,(30)(31)(32)(33). In this pathway, thiosulfate is oxidized in the periplasmic space by thiosulfate dehydrogenase, which requires a c-type cytochrome as an electron acceptor and/or a c-type heme molecule in the protein.…”

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confidence: 99%

Tetrathionate-Forming Thiosulfate Dehydrogenase from the Acidophilic, Chemolithoautotrophic Bacterium Acidithiobacillus ferrooxidans

Kikumoto

Nogami

Kanao

et al. 2013

Appl Environ Microbiol

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bThiosulfate dehydrogenase is known to play a significant role in thiosulfate oxidation in the acidophilic, obligately chemolithoautotroph, Acidithiobacillus ferrooxidans. Enzyme activity measured using ferricyanide as the electron acceptor was detected in cell extracts of A. ferrooxidans ATCC 23270 grown on tetrathionate or sulfur, but no activity was detected in ferrous iron-grown cells. The enzyme was enriched 63-fold from cell extracts of tetrathionate-grown cells. Maximum enzyme activity (13.8 U mg ؊1 ) was observed at pH 2.5 and 70°C. The end product of the enzyme reaction was tetrathionate. The enzyme reduced neither ubiquinone nor horse heart cytochrome c, which serves as an electron acceptor. A major protein with a molecular mass of ϳ25 kDa was detected in the partially purified preparation. Heme was not detected in the preparation, according to the results of spectroscopic analysis and heme staining. The open reading frame of AFE_0042 was identified by BLAST by using the N-terminal amino acid sequence of the protein. The gene was found within a region that was previously noted for sulfur metabolismrelated gene clustering. The recombinant protein produced in Escherichia coli had a molecular mass of ϳ25 kDa and showed thiosulfate dehydrogenase activity, with maximum enzyme activity (6.5 U mg ؊1 ) observed at pH 2.5 and 50°C.

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The S4-intermediate pathway for the oxidation of thiosulfate by the chemolithoautotroph Tetrathiobacter kashmirensis and inhibition of tetrathionate oxidation by sulfite

Cited by 57 publications

References 33 publications

Sulfur in agriculture

Sulfur in agriculture

Unravelling the complete genome sequence of Advenella mimigardefordensis strain DPN7T and novel insights in the catabolism of the xenobiotic polythioester precursor 3,3′-dithiodipropionate

Tetrathionate-Forming Thiosulfate Dehydrogenase from the Acidophilic, Chemolithoautotrophic Bacterium Acidithiobacillus ferrooxidans

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