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Open Access Methodology article

Generation and analysis of a barcode-tagged insertion mutant library in the fission yeast Schizosaccharomyces pombe

Bo-Ruei Chen12, Devin C Hale235, Peter J Ciolek246 and Kurt W Runge12*

Author affiliations

1 Department of Genetics, Case Western Reserve University School of Medicine, 10900 Euclid Avenue, Cleveland, OH, 44106, USA

2 Department of Molecular Genetics, Cleveland Clinic Lerner College of Medicine at CWRU, 9500 Euclid Avenue, NE20, Cleveland, OH, 44195, USA

3 John Carroll University, 20700 North Park Boulevard, University Heights, Ohio, 44118, USA

4 Miami University, 501 East High Street, Oxford, OH, 45056, USA

5 Current address: West Virginia School of Osteopathic Medicine, 400 North Lee Street, Lewisburg, WV, 24901, USA

6 Current address: College of Medicine, Ohio State University, 370 West 9th Avenue, Columbus, OH, 43210, USA

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Citation and License

BMC Genomics 2012, 13:161  doi:10.1186/1471-2164-13-161

Published: 3 May 2012

Abstract

Background

Barcodes are unique DNA sequence tags that can be used to specifically label individual mutants. The barcode-tagged open reading frame (ORF) haploid deletion mutant collections in the budding yeast Saccharomyces cerevisiae and the fission yeast Schizosaccharomyces pombe allow for high-throughput mutant phenotyping because the relative growth of mutants in a population can be determined by monitoring the proportions of their associated barcodes. While these mutant collections have greatly facilitated genome-wide studies, mutations in essential genes are not present, and the roles of these genes are not as easily studied. To further support genome-scale research in S. pombe, we generated a barcode-tagged fission yeast insertion mutant library that has the potential of generating viable mutations in both essential and non-essential genes and can be easily analyzed using standard molecular biological techniques.

Results

An insertion vector containing a selectable ura4+ marker and a random barcode was used to generate a collection of 10,000 fission yeast insertion mutants stored individually in 384-well plates and as six pools of mixed mutants. Individual barcodes are flanked by Sfi I recognition sites and can be oligomerized in a unique orientation to facilitate barcode sequencing. Independent genetic screens on a subset of mutants suggest that this library contains a diverse collection of single insertion mutations. We present several approaches to determine insertion sites.

Conclusions

This collection of S. pombe barcode-tagged insertion mutants is well-suited for genome-wide studies. Because insertion mutations may eliminate, reduce or alter the function of essential and non-essential genes, this library will contain strains with a wide range of phenotypes that can be assayed by their associated barcodes. The design of the barcodes in this library allows for barcode sequencing using next generation or standard benchtop cloning approaches.