On the function of the various quinone species in Escherichia coli.
| Autor: | Sharma P; Molecular Microbial Physiology group, Swammerdam Institute for Life Sciences, University of Amsterdam, The Netherlands., Teixeira de Mattos MJ, Hellingwerf KJ, Bekker M |
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| Jazyk: | angličtina |
| Zdroj: | The FEBS journal [FEBS J] 2012 Sep; Vol. 279 (18), pp. 3364-73. Date of Electronic Publication: 2012 May 30. |
| DOI: | 10.1111/j.1742-4658.2012.08608.x |
| Abstrakt: | The respiratory chain of Escherichia coli contains three quinones. Menaquinone and demethylmenaquinone have low midpoint potentials and are involved in anaerobic respiration, while ubiquinone, which has a high midpoint potential, is involved in aerobic and nitrate respiration. Here, we report that demethylmenaquinone plays a role not only in trimethylaminooxide-, dimethylsulfoxide- and fumarate-dependent respiration, but also in aerobic respiration. Furthermore, we demonstrate that demethylmenaquinone serves as an electron acceptor for oxidation of succinate to fumarate, and that all three quinol oxidases of E. coli accept electrons from this naphtoquinone derivative. (© 2012 The Authors Journal compilation © 2012 FEBS.) |
| Databáze: | MEDLINE |
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