Metagenomic NrdJm5 sequences placed in full phylogeny

posted on 29.01.2019 by Daniel Lundin, Christoph Loderer, Karin Holmfeldt

To search for sequences from metagenomics projects, we downloaded all TARA Ocean ORFs (Eren 2017, https://doi.org/10.6084/m9.figshare.4902917.v1 ; Delmont 2018, https://doi.org/10.1038/s41564-018-0176-9), all ORFs from the Human Microbiome Project (2019-01-09; HMP 2012a, https://doi.org/10.1038/nature11234 ; HMP 2012b, https://doi.org/10.1038/nature11209 ) the majority of bacterial MAGs and SAGs from IMG/MER (4910 MAGs, 2230 SAGs) plus 53 aquatic and soil metagenomes, in particular those with project names containing “virus”, “phage”, “therm” or “hot“ (see img_sags.tsv, img_metag_samples.tsv and img_mags.tsv) (Markowitz 2008, https://doi.org/10.1093/nar/gkm869). Together, we downloaded a total of 250,881,638 ORFs. We used hmm profiles designed for each clan in the phylogeny to search the sequences. We found 181 sequences with a best match to the profile designed from the TV clan. These were aligned to the original alignment using Clustal Omega in profile mode (all.NrdJm5.co.profile.wa.masked.alnfaa ; Sievers 2014, https://doi.org/10.1038/msb.2011.75) and phylogenetically placed in the phylogeny from https://doi.org/10.17045/sthlmuni.7117430.v2 with RAxML (Stamatakis 2014, https://doi.org/10.1093/bioinformatics/btu033). The resulting tree can be viewed with Dendroscope (Huson et al. 2007, https://doi.org/10.1186/1471-2105-8-460); placed sequences have "QUERY" prepended to their names.


Fonds der Chemischen Industrie (FCI) (SK201/03)

Zukunftskonzept of TU Dresden (Federal and State Excellence Initiative)

VR 2016-01920