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A multiple-alignment based primer design algorithm for genetically highly variable DNA targets

Johanna Brodin12, Mohan Krishnamoorthy1, Gayathri Athreya1, Will Fischer1, Peter Hraber1, Cheryl Gleasner3, Lance Green3, Bette Korber1 and Thomas Leitner1*

Author Affiliations

1 Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA

2 Department of Microbiology, Tumor and Cell Biology, Karolinska Institute, SE-17177, Stockholm Sweden

3 Biological Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA

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BMC Bioinformatics 2013, 14:255  doi:10.1186/1471-2105-14-255

Published: 21 August 2013

Abstract

Background

Primer design for highly variable DNA sequences is difficult, and experimental success requires attention to many interacting constraints. The advent of next-generation sequencing methods allows the investigation of rare variants otherwise hidden deep in large populations, but requires attention to population diversity and primer localization in relatively conserved regions, in addition to recognized constraints typically considered in primer design.

Results

Design constraints include degenerate sites to maximize population coverage, matching of melting temperatures, optimizing de novo sequence length, finding optimal bio-barcodes to allow efficient downstream analyses, and minimizing risk of dimerization. To facilitate primer design addressing these and other constraints, we created a novel computer program (PrimerDesign) that automates this complex procedure. We show its powers and limitations and give examples of successful designs for the analysis of HIV-1 populations.

Conclusions

PrimerDesign is useful for researchers who want to design DNA primers and probes for analyzing highly variable DNA populations. It can be used to design primers for PCR, RT-PCR, Sanger sequencing, next-generation sequencing, and other experimental protocols targeting highly variable DNA samples.

Keywords:
Primer design; DNA sequencing; Amplicon sequencing; Next-generation sequencing; PCR; Primer dimer; Bio-barcodes; Multiplex