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What is Sulfonates and Organotrophic Sulfite Metabolism about?

One is used to considering sulfite oxidation as part of a lithotrophic process (e.g. SorAB or Sox system), much of which involves neutral or ionic inorganic sulfur species on the outer surface of the cytoplasmic membrane. In contrast, the processes referred to in this chapter involve organic compounds, which (1) include a highly stable sulfonate substituent (C-SO 3 -), (2) are involved in the organotrophic growth of the organism and (3) much of whose metabolism takes place in the cytoplasm. Many phenomena are associated with this life-style. The sulfonate may be a natural product, e.g. taurine or sulfoquinovose, whose synthesis can involve sulfite, or a xenobiotic laundry detergent, but it is effectively always a charged species, so an uptake system is essential. Two known systems are mentioned, ATP binding cassette transporters and tripartite ATPindependent periplasmic transporters. Annual dissimilation of megatonnes of organosulfonates essentially always involves intracellular sulfite generated by diverse enzymic cleavages in bacteria, archaea and possibly eukarya. The fate of this sulfite in anaerobes is often sulfide. Aerobes occasionally excrete sulfite directly; more frequent

Author

Alasdair M. Cook; Theo H. M. Smits; Karin Denger

Publisher

Springer Berlin Heidelberg : Imprint : Springer

Published

2008

Language

EN

ISBN

9783540726821

Subjects

Science, Technology, Chemistry