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2021年06月01日

Multiplexing strategies for microbial whole genome SMRT Sequencing

Author(s): Lambert, Christine and Harting, John and Lee, Walter and Baybayan, Primo

The increased throughput of the RS II and Sequel Systems enables multiple microbes to be sequenced on a single SMRT Cell. This multiplexing can be readily achieved by simply incorporating a unique barcode for each microbe into the SMRTbell adapters after shearing genomic DNA using a streamlined library construction process. Incorporating a barcode without the requirement for PCR amplification prevents the loss of epigenetic information (e.g., methylation signatures), and the generation of chimeric sequences, while the modified protocol eliminates the need to build several individual SMRTbell libraries. We multiplexed up to 8 unique strains of H. pylori. Each strain was sheared, and processed through adapter ligation in a single, addition only reaction. The barcoded strains were then pooled in equimolar quantities, and processed through the remainder of the library preparation and purification steps. We demonstrate successful de novo microbial assembly and epigenetic analysis from all multiplexes (2 through 8-plex) using standard tools within SMRT Link Analysis using data generated from a single SMRTbell library, run on a single SMRT Cell. This process facilitates the sequencing of multiple microbial genomes in a single day, greatly increasing throughput and reducing costs per genome assembly.

Organization: PacBio
Year: 2016

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