Cited 8 time in webofscience Cited 8 time in scopus

Compact variant-rich customized sequence database and a fast and sensitive database search for efficient proteogenomic analyses

Title
Compact variant-rich customized sequence database and a fast and sensitive database search for efficient proteogenomic analyses
Authors
Park, H[Park, Heejin]Bae, J[Bae, Junwoo]Kim, H[Kim, Hyunwoo]Kim, S[Kim, Sangok]Kim, H[Kim, Hokeun]Mun, DG[Mun, Dong-Gi]Joh, Y[Joh, Yoonsung]Lee, W[Lee, Wonyeop]Chae, S[Chae, Sehyun]Lee, S[Lee, Sanghyuk]Kim, HK[Kim, Hark Kyun]Hwang, D[Hwang, Daehee]Lee, SW[Lee, Sang-Won]Paek, E[Paek, Eunok]
DGIST Authors
Chae, S[Chae, Sehyun]; Hwang, D[Hwang, Daehee]
Issue Date
2014-12
Citation
Proteomics, 14(23-24), 2742-2749
Type
Article
Article Type
Article
Keywords
AdultAmino Acid SequenceBioinformaticsEarly Onset Gastric CancerFemaleGene MutationGenetic AnalysisGenetic VariabilityGenomicsHumanIndel MutationNucleotidePeptide IdentificationProtein VariantProteogenomicsProteomicsReference DatabaseRNA SequenceSequence DatabaseStomach CancerStop Codon
ISSN
1615-9853
Abstract
In proteogenomic analysis, construction of a compact, customized database from mRNA-seq data and a sensitive search of both reference and customized databases are essential to accurately determine protein abundances and structural variations at the protein level. However, these tasks have not been systematically explored, but rather performed in an ad-hoc fashion. Here, we present an effective method for constructing a compact database containing comprehensive sequences of sample-specific variants-single nucleotide variants, insertions/deletions, and stop-codon mutations derived from Exome-seq and RNA-seq data. It, however, occupies less space by storing variant peptides, not variant proteins. We also present an efficient search method for both customized and reference databases. The separate searches of the two databases increase the search time, and a unified search is less sensitive to identify variant peptides due to the smaller size of the customized database, compared to the reference database, in the target-decoy setting. Our method searches the unified database once, but performs target-decoy validations separately. Experimental results show that our approach is as fast as the unified search and as sensitive as the separate searches. Our customized database includes mutation information in the headers of variant peptides, thereby facilitating the inspection of peptide-spectrum matches. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
URI
http://hdl.handle.net/20.500.11750/2636
DOI
10.1002/pmic.201400225
Publisher
Wiley Blackwell
Related Researcher
  • Author Hwang, Dae Hee Systems Biology and Medicine Lab
  • Research Interests Multilayered spatiotemporal networks; Regulatory motifs or pathways; Metabolite-protein networks; Network stochasticity; Proteomics and informatics
Files:
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Collection:
New BiologyETC1. Journal Articles


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