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- W2591661610 abstract "ABSTRACT Activated sludge is produced during the treatment of sewage and industrial wastewaters. Its diverse chemical composition allows growth of a large collection of microbial phylotypes with very different physiologic and metabolic profiles. Thus, activated sludge is considered as an excellent environment to discover novel enzymes through functional metagenomics, especially activities related with degradation of environmental pollutants. Metagenomic DNA was isolated and purified from an activated sludge sample. Metagenomic libraries were subsequently constructed in Escherichia coli . Using tributyrin hydrolysis, a screening by functional analysis was conducted and a clone that showed esterase activity was isolated. Blastx analysis of the sequence of the cloned DNA revealed, among others, an ORF that encodes a putative thioesterase with 47–64% identity to GenBank CDS reported genes, similar to those in the hotdog fold thioesterase superfamily. On the basis of its amino acid similarity and its homology‐modelled structure we deduced that this gene encodes an enzyme (ThYest_ar) that belongs to family TE13, with a preference for aryl‐CoA substrates and a novel catalytic residue constellation. Plasmid retransformation in E. coli confirmed the clone's phenotype, and functional complementation of a paaI E. coli mutant showed preference for phenylacetate over chlorobenzene as a carbon source. This work suggests a role for TE13 family thioesterases in swimming and degradation approaches for phenyl acetic acid. Proteins 2017; 85:1222–1237. © 2017 Wiley Periodicals, Inc." @default.
- W2591661610 created "2017-03-16" @default.
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- W2591661610 date "2017-03-24" @default.
- W2591661610 modified "2023-10-02" @default.
- W2591661610 title "A family 13 thioesterase isolated from an activated sludge metagenome: Insights into aromatic compounds metabolism" @default.
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- W2591661610 doi "https://doi.org/10.1002/prot.25282" @default.
- W2591661610 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/28276654" @default.
- W2591661610 hasPublicationYear "2017" @default.