Homology-based enzymatic DNA fragment assembly-based illumina sequencing library preparation

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Abstract

The current Illumina HiSeq and MiSeq platforms can generate paired-end reads of up to 2 x 250 bp and 2 x 300 bp in length, respectively. These read lengths may be substantially longer than genomic regions of interest when a DNA sequencing library is prepared through a target enrichment-based approach. A sequencing library preparation method has been developed based on the homology-based enzymatic DNA fragment assembly scheme to allow processing of multiple PCR products within a single read. Target sequences were amplified using locus-specific PCR primers with 8 bp tags, and using the tags, homology-based enzymatic DNA assembly was performed with DNA polymerase, T7 exonuclease and T4 DNA ligase. Short PCR amplicons can hence be assembled into a single molecule, along with sequencing adapters specific to the Illumina platforms. As a proof-of-concept experiment, short PCR amplicons (57-66 bp in length) derived from genomic DNA templates of field pea and containing variable nucleotide locations were assembled and sequenced on the MiSeq platform. The results were validated with other genotyping methods. When 5 PCR amplicons were assembled, 4.3 targeted sequences (single-nucleotide polymorphisms) on average were successfully identified within each read. The utility of this for sequencing of short fragments has consequently been demonstrated.

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APA

Shinozuka, H., Sudheesh, S., Shinozuka, M., & Cogan, N. O. I. (2018). Homology-based enzymatic DNA fragment assembly-based illumina sequencing library preparation. Biology Methods and Protocols, 3(1). https://doi.org/10.1093/biomethods/bpy001

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