Described in https://doi.org/10.1128/MRA.00435-19.
The genome was assembled using SPAdes and Canu, using default settings for both MinION and Illumina data. For the MinION data, Nanopolish
was used to improve the consensus sequence. The assembly resulted in three large contigs which were aligned against the closest reference genomes (those of “Ca. Nitrosocosmicus oleophilus” and “Ca. Nitrosocosmicus exaquare” using Mauve. This allowed a prediction of the orientation of the three contigs, and gaps were subsequently closed by long-range PCR using the MasterAmp extra-long PCR kit and Sanger sequencing. The closed genome was annotated using the MaGe platform.