Bacteria inorganic sulfur-oxidizing

Lundgren, D.G., 1971. Inorganic Sulfur Oxidation by Iron Oxidizing Bacteria. Water pollution control research series. Contract No. 14010 DAY, Environmental Protection Agency, Water Quality Office, Washington, DC, 149 pp. 

Inorganic Sulfur-Oxidizing Bacteria and Some of Their Properties... 

Kelly DP, ShergiU, JK, Wood AP. 1997. Oxidative metabolism of inorganic sulfur compounds by bacteria. Antonie Leeuwenhoek 71 95-107. 

Cysteine not only is an essential constituent of proteins but also lies on the major route of incorporation of inorganic sulfur into organic compounds.443 Autotrophic organisms carry out the stepwise reduction of sulfate to sulfite and sulfide (H2S). These reduced sulfur compounds are the ones that are incorporated into organic substances. Animals make use of the organic sulfur compounds formed by the autotrophs and have an active oxidative metabolism by which the compounds can be decomposed and the sulfur reoxidized to sulfate. Several aspects of cysteine metabolism are summarized in Fig. 24-25. Some of the chemistry of inorganic sulfur metabolism has been discussed in earlier chapters. Sulfate is reduced to H2S by sulfate-reducing bacteria (Chapter 18). The initial step in assimilative sulfate reduction, used by... 

Chemoautotroph Oxidation of inorganic compounds Oxidation of inorganic compounds co2 Hydrogen, sulfur, iron, and denitrifying bacteria... 

The biotransformations of sulfur compounds by microorganisms can have large-scale impacts on global chemistry. As an example, sulfate-reducing bacteria have, throughout histoiy, formed major deposits of elemental sulfur and iron sulfides on Earth, and these processes are continuing today (1). Contemporary sulfate-reduction coupled with the oxidation of reduced inorganic sulfur... 

Bacteria of the genus Thiobacillus, obtain energy not by oxidation of organic compounds, but by oxidation of inorganic sulfur compounds (including sulfides) to sulfuric acid. The following reactions are performed by mixed cultures of Thiobacilli... 

Dannenberg S., Kroder M., Dilling W., and Cypionka H. (1992) Oxidation of H2, organic compounds and inorganic sulfur compounds coupled to reduction of O2 or nitrate by sulfate-reducing bacteria. Arch. Microbiol. 158, 93 -99. 

Elemental sulfur produced by sulfur compound oxidizing bacteria ( biosul-fur ) has distinctly different properties than crystalhne elemental sulfur. The hydrophilic properties of biosulfur are the most striking of these differences. As a result of this, biologically produced sulfur can be dispersed in aqueous solutions, whereas crystalline inorganic sulfur is hydrophobic and will not be wetted by an aqueous solution. 

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