Ultra-deep, long-read nanopore sequencing of mock microbial community standards
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A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
No Canadian affiliation. An affiliation-only frame — the usual design — would never have seen this work. It is one of the works that make the case for inverting the frame.
Machine scores (provisional)
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
- Teacher spread
- 0.232 · how far apart the two teachers sit on this one work
- Validation status
score_only:v0-immature-baseline· verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it
Abstract
BACKGROUND: Long sequencing reads are information-rich: aiding de novo assembly and reference mapping, and consequently have great potential for the study of microbial communities. However, the best approaches for analysis of long-read metagenomic data are unknown. Additionally, rigorous evaluation of bioinformatics tools is hindered by a lack of long-read data from validated samples with known composition. FINDINGS: We sequenced 2 commercially available mock communities containing 10 microbial species (ZymoBIOMICS Microbial Community Standards) with Oxford Nanopore GridION and PromethION. Both communities and the 10 individual species isolates were also sequenced with Illumina technology. We generated 14 and 16 gigabase pairs from 2 GridION flowcells and 150 and 153 gigabase pairs from 2 PromethION flowcells for the evenly distributed and log-distributed communities, respectively. Read length N50 ranged between 5.3 and 5.4 kilobase pairs over the 4 sequencing runs. Basecalls and corresponding signal data are made available (4.2 TB in total). Alignment to Illumina-sequenced isolates demonstrated the expected microbial species at anticipated abundances, with the limit of detection for the lowest abundance species below 50 cells (GridION). De novo assembly of metagenomes recovered long contiguous sequences without the need for pre-processing techniques such as binning. CONCLUSIONS: We present ultra-deep, long-read nanopore datasets from a well-defined mock community. These datasets will be useful for those developing bioinformatics methods for long-read metagenomics and for the validation and comparison of current laboratory and software pipelines.
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The record
- Venue
- GigaScience
- Topic
- Genomics and Phylogenetic Studies
- Field
- Biochemistry, Genetics and Molecular Biology
- Canadian institutions
- —
- Funders
- University of British ColumbiaNortheastern UniversityMedical Research CouncilUniversity of BirminghamOntario Institute for Cancer ResearchNational Institute for Health and Care ResearchOxford Nanopore TechnologiesUniversity of NottinghamUniversity of QueenslandCornell University
- Keywords
- MetagenomicsNanopore sequencingDeep sequencingSequence assemblyComputational biologyMicrobial population biologyIllumina dye sequencingDNA sequencingBiologyNanoporeComputer scienceGenomeData miningGeneticsGeneNanotechnologyBacteria
- Has abstract in OpenAlex
- yes