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Bidirectional usage of ferulate by the acetogen Peptostreptococcus productus U-1 : CO2 and aromatic acrylate groups as competing electron acceptors

Title data

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. Vol. 142 (1996) Issue 8 . - pp. 1983-1988.
ISSN 1350-0872
DOI: https://doi.org/10.1099/13500872-142-8-1983

Abstract in another language

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.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER7033
Institutions of the University: Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Chair Ecological Microbiology
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 30 Sep 2015 05:56
Last Modified: 30 Sep 2015 05:56
URI: https://eref.uni-bayreuth.de/id/eprint/20007