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Category Text Publication
Reference Category Journals
DOI 10.1038/ismej.2012.68
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Title (Primary) Protein-SIP enables time-resolved analysis of the carbon flux in a sulfate-reducing, benzene-degrading microbial consortium
Author Taubert, M.; Vogt, C.; Wubet, T. ORCID logo ; Kleinsteuber, S. ORCID logo ; Tarkka, M.T.; Harms, H.; Buscot, F.; Richnow, H.-H.; von Bergen, M.; Seifert, J.
Source Titel ISME Journal
Year 2012
Volume 6
Issue 12
Page From 2291
Page To 2301
Language englisch
Keywords anaerobic benzene degradation; functional metaproteomics; protein-SIP; mass spectrometry; carbon flux

Benzene is a major contaminant in various environments, but the mechanisms behind its biodegradation under strictly anoxic conditions are not yet entirely clear. Here we analyzed a benzene-degrading, sulfate-reducing enrichment culture originating from a benzene-contaminated aquifer by a metagenome-based functional metaproteomic approach, using protein-based stable isotope probing (protein-SIP). The time-resolved, quantitative analysis of carbon fluxes within the community supplied with either 13C-labeled benzene or 13C-labeled carbonate yielded different functional groups of organisms, with their peptides showing specific time dependencies of 13C relative isotope abundance indicating different carbon utilization. Through a detailed analysis of the mass spectrometric (MS) data, it was possible to quantify the utilization of the initial carbon source and the metabolic intermediates. The functional groups were affiliated to Clostridiales, Deltaproteobacteria and Bacteroidetes/Chlorobi. The Clostridiales-related organisms were involved in benzene degradation, putatively by fermentation, and additionally used significant amounts of carbonate as a carbon source. The other groups of organisms were found to perform diverse functions, with Deltaproteobacteria degrading fermentation products and Bacteroidetes/Chlorobi being putative scavengers feeding on dead cells. A functional classification of identified proteins supported this allocation and gave further insights into the metabolic pathways and the interactions between the community members. This example shows how protein-SIP can be applied to obtain temporal and phylogenetic information about functional interdependencies within microbial communities.

Persistent UFZ Identifier
Taubert, M., Vogt, C., Wubet, T., Kleinsteuber, S., Tarkka, M.T., Harms, H., Buscot, F., Richnow, H.-H., von Bergen, M., Seifert, J. (2012):
Protein-SIP enables time-resolved analysis of the carbon flux in a sulfate-reducing, benzene-degrading microbial consortium
ISME J. 6 (12), 2291 - 2301 10.1038/ismej.2012.68