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- W2441587777 abstract "In order to overcome the high rick resulting from the model based algorithm while processing dataset with very different characteristics, data mining algorithms were developed to improve the sensitivity for peptide and protein identifications safely. A filtering criteria optimization strategy using genetic algorithm was developed for the determination of tailored filtering criteria for different datasets; and an instance based algorithm using local false discovery rate (local FDR) was developed for the estimation of peptide identification posterior probability by incorporating of k nearest neighbors algorithm and Shannon information entropy strategy. By combining phosphopeptide identification information from MS2 and its consecutive MS3 spectra, an automatic phosphopeptide identification algorithm was developed to overcome the difficulties for phosphopeptide identifications, high FDR and the fact that manual validation is highly relied for the generation of high confident phosphopeptide identifications. By using this strategy, high confidence and sensitivity were achieved for phosphopeptide identification and phosphorylation site localization without the need of manual validation even for low accuracy mass spectrometry. Then a software suite targeted for the validating and processing of phosphoproteome dataset was established to help researchers to generate high confident phosphopeptide/phosphoprotein identifications and prepare phosphoproteome dataset with sufficient information easily.Keywords: Shotgun proteomics/ data mining/ bioinformatics/ phosphorylation/ References 1. Jiang, X. N., Jiang, X. G., Han, G. H., Ye, M. L. and Zou, H. F. Optimization of filtering criterion for SEQUEST database searching to improve proteome coverage in shotgun proteomics BMC Bioinformatics 2007, 8:323.2. Jiang, X. N., Han, G. H., Feng, S., Jiang, X. G., Ye, M. L., Yao, X. B. and Zou, H. F. Automatic Validation of Phosphopeptide Identifications by the MS2/MS3 Target-Decoy Search Strategy J. Proteome Res. 2008, 7, 1640-1649.3. Jiang, X. N., Dong, X. L., Ye, M. L. and Zou, H. F. Instance Based Algorithm for Posterior Probability Calculation by Target-Decoy Strategy to Improve Protein Identifications Anal. Chem. 2008, 80, 9326-9335." @default.
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- W2441587777 date "2009-10-19" @default.
- W2441587777 modified "2023-09-23" @default.
- W2441587777 title "Data mining algorithms to improve the sensitivity and reliability for protein and protein phosphorylation identification in shotgun proteomics" @default.
- W2441587777 hasPublicationYear "2009" @default.
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