library preparation and metagenome sequencing was performed at IMGM Laboratories
GmbH (Martinsried, Germany). The shotgun library was prepared using the
Nextera® XT Sample Preparation technology
(Illumina, San Diego, CA, USA). The libraries were size selected using
Agencourt® AMPure® XP
beads (Beckman Coulter, Pasadena, CA, USA) with a bead to DNA ratio of 0.6 to 1
(v/v). Quality and purity of the libraries has been analyzed with the High
Sensitivity DNA Analysis Kit (Agilent Technologies, Santa Clara, CA, USA) on a
2100 Bioanalyzer (Agilent Technologies, Santa Clara, CA, USA). Prior to library
normalization the libraries were quantified using the Quant-iT™
PicoGreen® dsDNA assay kit (Invitrogen, Eugen,
OR, USA). Sequencing was performed on an Illumina
Miseq® sequencing system (Illumina, San Diego,
CA, USA) with the MiSeq Reagent Kit v3 (Illumina, San Diego, CA, USA) resulting
in a read length of 2 × 300 bp.
Signal processing, de-multiplexing and trimming of adapter sequences were
performed using the MiSeq® Reporter Software v.
2.3.32 (Illumina, San Diego, CA, USA).