Article abstract

NNAlign: a web-based prediction method allowing non-expert end-user discovery of sequence motifs in quantitative peptide data
Andreatta M¹, Schafer-Nielsen C², Lund O¹, Buus S², Nielsen M¹

PLoS ONE 6(11): e26781. doi:10.1371/journal.pone.0026781 (Nov 2011)

¹Center for Biological Sequence Analysis, Technical University of Denmark, DK-2800 Lyngby, Denmark
²Schafer-N, Copenhagen, Denmark
³Division of Experimental Immunology, Institute of Medical Microbiology and Immunology, University of Copenhagen, Denmark

Recent advances in high-throughput technologies have made it possible to generate both gene and protein sequence data at an unprecedented rate and scale thereby enabling entirely new "omics"-based approaches towards the analysis of complex biological processes. However, the amount and complexity of data that even a single experiment can produce seriously challenges researchers with limited bioinformatics expertise, who need to handle, analyze and interpret the data before it can be understood in a biological context. Thus, there is an unmet need for tools allowing non-bioinformatics users to interpret large data sets. We have recently developed a method, NNAlign, which is generally applicable to any biological problem where quantitative peptide data is available. This method efficiently identifies underlying sequence patterns by simultaneously aligning peptide sequences and identifying motifs associated with quantitative readouts. Here, we provide a web-based implementation of NNAlign allowing non-expert end-users to submit their data (optionally adjusting method parameters), and in return receive a trained method (including a visual representation of the identified motif) that subsequently can be used as prediction method and applied to unknown proteins/peptides. We have successfully applied this method to several different data sets including peptide microarray-derived sets containing more than 100,000 data points. NNAlign is available online at http://www.cbs.dtu.dk/services/NNAlign

Citation: Andreatta M., Schafer-Nielsen C., Lund L., Buus S. and Nielsen M. (2011) "NNAlign: a web-based prediction method allowing non-expert end-user discovery of sequence motifs in quantitative peptide data". PLoS ONE 6(11): e26781. doi:10.1371/journal.pone.0026781

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