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Isoform discovery by targeted cloning, 'deep-well' pooling and parallel sequencing

Abstract

Describing the 'ORFeome' of an organism, including all major isoforms, is essential for a system-level understanding of any species; however, conventional cloning and sequencing approaches are prohibitively costly and labor-intensive. We describe a potentially genome-wide methodology for efficiently capturing new coding isoforms using reverse transcriptase (RT)-PCR recombinational cloning, 'deep-well' pooling and a next-generation sequencing platform. This ORFeome discovery pipeline will be applicable to any eukaryotic species with a sequenced genome.

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Figure 1: The isoform discovery pipeline.
Figure 2: Examples of identified ORFs.
Figure 3: Sequence assembly results and simulation.

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Acknowledgements

This work was funded in part by a grant from the Ellison Foundation (awarded to M.V.) and in part by the Dana Farber Cancer Institute Strategic Initiative in support of Center for Cancer Systems Biology. F.P.R. acknowledges support from US National Institutes of Health grants NS054052, HG003224, HL081341. W.T. was supported in part by National Institutes of Health grant DK070078. We thank the West Quad Computing Group at Harvard Medical School as well as Research Computing at Massachusetts General Hospital for assistance with computational resources. We thank G. Temple for helpful comments on the manuscript.

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Correspondence to Kourosh Salehi-Ashtiani, Frederick P Roth or Marc Vidal.

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K.M., L.S., N.T. and D.R.S. are employed by Agencourt Corp.

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Supplementary Figures 1–10, Supplementary Note, Supplementary Methods (PDF 1421 kb)

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Salehi-Ashtiani, K., Yang, X., Derti, A. et al. Isoform discovery by targeted cloning, 'deep-well' pooling and parallel sequencing. Nat Methods 5, 597–600 (2008). https://doi.org/10.1038/nmeth.1224

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