Discovery of carbamate degrading enzymes by functional metagenomics

• Published in: PloS one Vol. 12; no. 12; p. e0189201
• Main Authors: Ufarté, Lisa, Laville, Elisabeth, Duquesne, Sophie, Morgavi, Diego, Robe, Patrick, Klopp, Christophe, Rizzo, Angeline, Pizzut-Serin, Sandra, Potocki-Veronese, Gabrielle
• Format: Journal Article
• Language: English
• Published: United States Public Library of Science 14.12.2017; Public Library of Science (PLoS)
• Subjects: Acetic acid; Agrochemicals; Animals; Biology and Life Sciences; Bioremediation; Biotechnology; Carbamate compounds; Carbamate pesticides; Carbamates; Carbamates (tradename); Carbamates - metabolism; Carcinogens; Cattle; Cloning; Data collection; Degradation; Elastomers; Enzymes; Esterase; Hydrolase; Insecticides; Library collections; Life Sciences; Metabolism; Metagenomics; Microbiota; Palmitic acid; Pesticides; Physical Sciences; Pollutants; Polymers; Polyurethane; Polyurethane resins; Proteins; Research and Analysis Methods; Xenobiotics; France; thiocarbamates; microbiote; composé xénobiotique; biodegradation; polymère; polluant; carbamate; séquençage; rumen; pollutant
• ISSN: 1932-6203; 1932-6203
• DOI: 10.1371/journal.pone.0189201

Bioremediation of pollutants is a major concern worldwide, leading to the research of new processes to break down and recycle xenobiotics and environment contaminating polymers. Among them, carbamates have a very broad spectrum of uses, such as toxinogenic pesticides or elastomers. In this study, we mined the bovine rumen microbiome for carbamate degrading enzymes. We isolated 26 hit clones exhibiting esterase activity, and were able to degrade at least one of the targeted polyurethane and pesticide carbamate compounds. The most active clone was deeply characterized. In addition to Impranil, this clone was active on Tween 20, pNP-acetate, butyrate and palmitate, and on the insecticide fenobucarb. Sequencing and sub-cloning of the best target revealed a novel carboxyl-ester hydrolase belonging to the lipolytic family IV, named CE_Ubrb. This study highlights the potential of highly diverse microbiota such as the ruminal one for the discovery of promiscuous enzymes, whose versatility could be exploited for industrial uses.