We are pleased to be able to release prototype R10 pore data for the even Zymo mock community generated on the Oxford Nanopore GridION. This data is from the even mock community and has been generated in the same manner as previous releases, except that this material is from PCR-amplified material.
The R10 pore is expected to give better discrimination in homopolymer regions and preliminary analysis suggests it improves consensus-level accuracy (see Jared Simpson's talk at NCM18 for early results: https://vimeo.com/306201411). This dataset is made available without restriction for community analysis. We anticipate releasing detailed analysis in the near future.
Summary stats:
- Reads: 4.23M
- Bases: 16.59Gb
- Read length N50: 4,620bp
Signal files were basecalled using Guppy 2.3.1+1b9405b using a pre-release basecalling model R10_flipflop_model.json.
Download links (courtesy of CLIMB):
We thank Rosemary Dokos, Chris Wright, Jon Pugh and Jayne Wallace from Oxford Nanopore Technologies for their help and assistance with preparation of this dataset.
We recently released data for the Zymo mock community (1 run on PromethION, 3 runs on MinION). However, we found that our previous bead-based DNA extraction which focused on the bacterial cell pellet from the Zymo mock community resulted in under-representation of the Gram-negative bacteria in the sample. Additionally, during this work, the composition of the Zymo mock community changed.
Therefore we have repeated the sequencing of the most recent Zymo log and even community samples on the GridION and PromethION. In this case we prepared libraries simultaneously, incorporating both the pellet extraction and the supernatant to try to recover all species equally.
We loaded the same libraries on GridION and PromethION, permitting a direct comparison of these two instruments to be made.
- Useful for evaluating nanopore data analysis, including basecalling, alignment, assembly and taxonomic assignment methods
- 10 species (5 Gram-positive, 3 Gram-negative, 2 yeast): the bacteria are present at 12% and yeast at 2% (by genomic DNA)
- Zymo Specification Sheet
- Data available from:
- GridION (Zymo-GridION-EVEN-BB-SN)
- PromethION (Zymo-PromethION-EVEN-BB-SN)
- Useful for evaluating limit of detection at high coverage and assess metagenomics assembly across large differences in abundances
- 10 species (5 Gram-positive, 3 Gram-negative, 2 yeast) ranging from 10^2 - 10^8 genomic DNA abundance (total input 5 x 10^8 cells)
- Zymo Specification Sheet
- Data available from:
- GridION (Zymo-GridION-LOG-BB-SN)
- PromethION (Zymo-PromethION-LOG-BB-SN)
| Name | Reads (M) | Yield (G) | FASTQ | Run Folder | Restarts | FAST5 |
|---|---|---|---|---|---|---|
| Zymo-PromethION-LOG-BB-SN | 35.1 | 148 | fastq.gz | 64h run | restarts | download.sh, restarts.tar |
| Zymo-PromethION-EVEN-BB-SN | 36.5 | 146 | fastq.gz | 64h run | restarts | download.sh, restarts.tar |
| Zymo-GridION-LOG-BB-SN | 3.7 | 16 | fastq.gz | 48h run | n/a | signal.tar |
| Zymo-GridION-EVEN-BB-SN | 3.5 | 14 | fastq.gz | 48h run | n/a | signal.tar |
Please refer to Josh Quick's talk at Genome Science 2018.
Refer to our project website for assemblies.
Data are available under a Creative Commons Attribution 4.0 International (CC BY 4.0) license, i.e. you are free to use the data with attribution.
We are grateful to Hannah McDonnell (Cambridge Biosciences) for free samples of the Zymo mock community, and Shuiquan Tang for helpful advice for this work. We are grateful to Divya Mirrington (Oxford Nanopore Technologies) for assistance with PromethION library preparation. We thank Radoslaw Poplawski (CLIMB, University of Birmingham) for sequencer networking and file system help with the data release. We are grateful to CLIMB for data hosting.
- September 2018 - Revision 1 data available here.