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Title: Genome-reconstruction for eukaryotes from complex natural microbial communities

Journal Article · · Genome Research
 [1];  [2];  [3];  [2];  [4]
  1. Univ. of California, Berkeley, CA (United States). Department of Plant and Microbial Biology
  2. Univ. of California, Berkeley, CA (United States). Department of Earth and Planetary Science
  3. Univ. of California, Berkeley, CA (United States). Department of Plant and Microbial Biology ; USDOE Joint Genome Institute (JGI), Walnut Creek, CA (United States)
  4. Univ. of California, Berkeley, CA (United States). Department of Earth and Planetary Science and Department of Environmental Science, Policy, and Management; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Earth Sciences Division

Microbial eukaryotes are integral components of natural microbial communities, and their inclusion is critical for many ecosystem studies, yet the majority of published metagenome analyses ignore eukaryotes. In order to include eukaryotes in environmental studies, we propose a method to recover eukaryotic genomes from complex metagenomic samples. A key step for genome recovery is separation of eukaryotic and prokaryotic fragments. We developed a k-mer-based strategy, EukRep, for eukaryotic sequence identification and applied it to environmental samples to show that it enables genome recovery, genome completeness evaluation, and prediction of metabolic potential. We used this approach to test the effect of addition of organic carbon on a geyser-associated microbial community and detected a substantial change of the community metabolism, with selection against almost all candidate phyla bacteria and archaea and for eukaryotes. Near complete genomes were reconstructed for three fungi placed within the Eurotiomycetes and an arthropod. While carbon fixation and sulfur oxidation were important functions in the geyser community prior to carbon addition, the organic carbon-impacted community showed enrichment for secreted proteases, secreted lipases, cellulose targeting CAZymes, and methanol oxidation. We demonstrate the broader utility of EukRep by reconstructing and evaluating relatively high-quality fungal, protist, and rotifer genomes from complex environmental samples. This approach opens the way for cultivation-independent analyses of whole microbial communities.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1477272
Journal Information:
Genome Research, Vol. 28, Issue 4; ISSN 1088-9051
Publisher:
Cold Spring Harbor Laboratory PressCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 87 works
Citation information provided by
Web of Science

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Cited By (9)

Fungi in aquatic ecosystems journal March 2019
Building de novo reference genome assemblies of complex eukaryotic microorganisms from single nuclei journal January 2020
Combining morphology, behaviour and genomics to understand the evolution and ecology of microbial eukaryotes journal October 2019
Metabolic Capability and Phylogenetic Diversity of Mono Lake during a Bloom of the Eukaryotic Phototroph Picocystis sp. Strain ML journal August 2018
Determining Microbial Roles in Ecosystem Function: Redefining Microbial Food Webs and Transcending Kingdom Barriers journal June 2019
Genome-resolved metagenomics of eukaryotic populations during early colonization of premature infants and in hospital rooms journal February 2019
Lipid analysis of CO2-rich subsurface aquifers suggests an autotrophy-based deep biosphere with lysolipids enriched in CPR bacteria journal March 2020
Accurate and complete genomes from metagenomes journal March 2020
MetaEuk—sensitive, high-throughput gene discovery, and annotation for large-scale eukaryotic metagenomics journal April 2020