Comparative Genomics and Metabolomics Analyses of Clavulanic Acid-Producing Species Provides Insight Into Specialized Metabolism

Overview

Journal Front Microbiol

Specialty Microbiology

Date 2019 Dec 3

PMID 31787949

Citations 16

Authors

Nader F AbuSara

Brandon M Piercey

Marcus A Moore

Arshad Ali Shaikh

Louis-Felix Nothias

Santosh K Srivastava

Pablo Cruz-Morales

Pieter C Dorrestein

Francisco Barona-Gomez

Kapil Tahlan

Affiliations

Soon will be listed here.

Abstract

Clavulanic acid is a bacterial specialized metabolite, which inhibits certain serine β-lactamases, enzymes that inactivate β-lactam antibiotics to confer resistance. Due to this activity, clavulanic acid is widely used in combination with penicillin and cephalosporin (β-lactam) antibiotics to treat infections caused by β-lactamase-producing bacteria. Clavulanic acid is industrially produced by fermenting , as large-scale chemical synthesis is not commercially feasible. Other than , and also produce clavulanic acid along with cephamycin C, but information regarding their genome sequences is not available. In addition, the contain many biosynthetic gene clusters thought to be "cryptic," as the specialized metabolites produced by them are not known. Therefore, we sequenced the genomes of and , and examined their metabolomes using untargeted mass spectrometry along with for comparison. We analyzed the biosynthetic gene cluster content of the three species to correlate their biosynthetic capacities, by matching them with the specialized metabolites detected in the current study. It was recently reported that can produce the plant-associated metabolite naringenin, and we describe more examples of such specialized metabolites in extracts from the three species. Detailed comparisons of the biosynthetic gene clusters involved in clavulanic acid (and cephamycin C) production were also performed, and based on our analyses, we propose the core set of genes responsible for producing this medicinally important metabolite.

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