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Misoph, Martina ; Daniel, Steven L. ; Drake, Harold L.:
Bidirectional usage of ferulate by the acetogen Peptostreptococcus productus U-1 : CO2 and aromatic acrylate groups as competing electron acceptors.
In: Microbiology.
Bd. 142
(1996)
Heft 8
.
- S. 1983-1988.
ISSN 1350-0872
DOI: https://doi.org/10.1099/13500872-142-8-1983
Abstract
The influence of CO2 on the ability of Peptostreptococcus productus U-1 (ATCC 35244) to engage an aromatic acrylate group as an energy-conserving electron acceptor during O-methyl-dependent growth was examined. Ferulate (a methoxylated phenylacrylate), unlike hydroferulate (a methoxylated phenylpropionate), supported growth under CO2-limited conditions and was metabolized according to the following stoichiometry: 1 ferulate ynthesis (CO2 as reductant sink) was minimal. In phase II, acetate synthesis increased, but growth in this phase was much less than that in phase I. In CO2-enriched cultures, distinct phases were not observed, and reductant flow was coupled equally to CO2 and acrylate group reduction. However, in the presence of supplemental CO2, O-methyl and acrylate groups were incompletely metabolized, and molar growth yields were significantly lower compared to CO2-limited conditions. Resting cell studies indicated that the O-demethylase and aromatic acrylate oxidoreductase activities were the result of inducible metabolic potentials. Although these findings demonstrated that P. productus U-1 can engage the aromatic acrylate oxidoreductase system as a sole energy-conserving, electron-accepting process, this acetogen is not able to prevent the simultaneous engagement of the bioenergetically less favorable acetyl-CoA pathway during O-methyl-dependent growth.
Weitere Angaben
| Publikationsform: | Artikel in einer Zeitschrift |
|---|---|
| Begutachteter Beitrag: | Ja |
| Zusätzliche Informationen: | BAYCEER7033 |
| Institutionen der Universität: | Forschungseinrichtungen > Forschungszentren > Bayreuther Zentrum für Ökologie und Umweltforschung - BayCEER Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Biologie > Lehrstuhl Ökologische Mikrobiologie Fakultäten Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Biologie Forschungseinrichtungen Forschungseinrichtungen > Forschungszentren |
| Titel an der UBT entstanden: | Ja |
| Themengebiete aus DDC: | 500 Naturwissenschaften und Mathematik |
| Eingestellt am: | 30 Sep 2015 05:56 |
| Letzte Änderung: | 30 Sep 2015 05:56 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/20007 |