Most antibiotics are derived from the soil, but their catabolism there, which is necessary to close the antibiotic carbon cycle, remains uncharacterized. We report the first draft genome sequences of soil identified for subsisting solely on β-lactams as their carbon sources. The genomes encode multiple β-lactamases, although their antibiotic catabolic pathways remain enigmatic.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5552975PMC
http://dx.doi.org/10.1128/genomeA.00653-17DOI Listing

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