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Shotgun metaproteomic profiling of biomimetic anaerobic digestion processes treating sewage sludge
Author(s) -
Bize Ariane,
Cardona Laëtitia,
DesmondLe Quéméner Elie,
Battimelli Audrey,
Badalato Nelly,
Bureau Chrystelle,
Madigou Céline,
Chevret Didier,
Guillot Alain,
Monnet Véronique,
Godon JeanJacques,
Bouchez Théodore
Publication year - 2015
Publication title -
proteomics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.26
H-Index - 167
eISSN - 1615-9861
pISSN - 1615-9853
DOI - 10.1002/pmic.201500041
Subject(s) - anaerobic digestion , sewage sludge , profiling (computer programming) , activated sludge , sewage , waste management , chemistry , biology , sewage treatment , methane , engineering , ecology , computer science , operating system
Two parallel anaerobic digestion lines were designed to match a "bovid-like" digestive structure. Each of the lines consisted of two continuous stirred tank reactors placed in series and separated by an acidic treatment step. The first line was inoculated with industrial inocula whereas the second was seeded with cow digestive tract contents. After 3 months of continuous sewage sludge feeding, samples were recovered for shotgun metaproteomic and DNA-based analysis. Strikingly, protein-inferred and 16S ribosomal DNA tags based taxonomic community profiles were not consistent. PCA however revealed a similar clustering pattern of the samples, suggesting that reproducible methodological and/or biological factors underlie this observation. The performances of the two digestion lines did not differ significantly and the cow-derived inocula did not establish in the reactors. A low throughput metagenomic dataset (3.4 × 10(6) reads, 1.1 Gb) was also generated for one of the samples. It allowed a substantial increase of the analysis depth (11 vs. 4% of spectral identification rate for the combined samples). Surprisingly, a high proportion of proteins from members of the "Candidatus Competibacter" group, a key microbial player usually found in activated sludge plants, was retrieved in our anaerobic digester samples. Data are available via ProteomeXchange with identifier PXD002420 (http://proteomecentral.proteomexchange.org/dataset/PXD002420).