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Title: Bacterial Secondary Metabolite Biosynthetic Potential in Soil Varies with Phylum, Depth, and Vegetation Type

Journal Article · · mBio
 [1];  [2];  [3];  [1];  [2];  [3];
  1. Department of Earth and Planetary Science, University of California, Berkeley, Berkeley, California, USA
  2. Department of Plant and Microbial Biology, University of California, Berkeley, Berkeley, California, USA
  3. Department of Earth and Planetary Science, University of California, Berkeley, Berkeley, California, USA, Innovative Genomics Institute, Berkeley, California, USA

Bacteria isolated from soils are major sources of specialized metabolites, including antibiotics and other compounds with clinical value that likely shape interactions among microbial community members and impact biogeochemical cycles. Yet, isolated lineages represent a small fraction of all soil bacterial diversity. It remains unclear how the production of specialized metabolites varies across the phylogenetic diversity of bacterial species in soils and whether the genetic potential for production of these metabolites differs with soil depth and vegetation type within a geographic region. We sampled soils and saprolite from three sites in a northern California Critical Zone Observatory with various vegetation and bedrock characteristics and reconstructed 1,334 metagenome-assembled genomes containing diverse biosynthetic gene clusters (BGCs) for secondary metabolite production. We obtained genomes for prolific producers of secondary metabolites, including novel groups within the Actinobacteria, Chloroflexi, and candidate phylum “Candidatus Dormibacteraeota.” Surprisingly, one genome of a candidate phyla radiation (CPR) bacterium coded for a ribosomally synthesized linear azole/azoline-containing peptide, a capacity we found in other publicly available CPR bacterial genomes. Overall, bacteria with higher biosynthetic potential were enriched in shallow soils and grassland soils, with patterns of abundance of BGC type varying by taxonomy.

Research Organization:
Univ. of California, Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER); National Science Foundation (NSF)
Grant/Contract Number:
DOE-SC10010566; SC0010566; CZP EAR-1331940
OSTI ID:
1633383
Alternate ID(s):
OSTI ID: 1816397
Journal Information:
mBio, Journal Name: mBio Vol. 11 Journal Issue: 3; ISSN 2161-2129
Publisher:
American Society for MicrobiologyCopyright Statement
Country of Publication:
United States
Language:
English

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