Protein co-expression network analysis (ProCoNA)

Journal of Clinical Bioinformatics

Shannon K McWeeney⁴  Michael G Katze⁶  Eric S Orwoll⁷  Richard D Smith²  Yoshihiro Kawaoka¹  Ralph S Baric⁵  Arie Baratt⁷  David L Gibbs³ 

[1] Department of Pathobiological Sciences, University of Wisconsin-Madison, 2015 Linden Dr, Madison, WI 53706, USA;Biological Sciences Division, Pacific Northwest National Laboratory, Richland, WA, USA;Division of Bioinformatics and Computational Biology, Oregon Health & Science University, 3181 S.W. Sam Jackson Park Rd, Portland, OR 97239, USA;OHSU Knight Cancer Institute, Oregon Health & Science University, 3181 S.W. Sam Jackson Park Rd, Portland, OR 97239, USA;Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, 220 E Cameron Ave, Chapel Hill, NC 27514, USA;Department of Microbiology, School of Medicine, Box 357735, University of Washington, Seattle, WA 98195, USA;Oregon Clinical & Translational Research Institute, Oregon Health & Science University, 3181 S.W. Sam Jackson Park Rd, Portland, OR 97239, USA

关键词: Proteomics;    LC-MS;    Sarcopenia;    Virology;    Systems biology;    Networks;    Biological networks;    Biomarkers;   

Others  :  802891
DOI  :  10.1186/2043-9113-3-11

 received in 2013-02-22, accepted in 2013-05-23,  发布年份 2013

【 摘 要 】

Background

Biological networks are important for elucidating disease etiology due to their ability to model complex high dimensional data and biological systems. Proteomics provides a critical data source for such models, but currently lacks robust de novo methods for network construction, which could bring important insights in systems biology.

Results

We have evaluated the construction of network models using methods derived from weighted gene co-expression network analysis (WGCNA). We show that approximately scale-free peptide networks, composed of statistically significant modules, are feasible and biologically meaningful using two mouse lung experiments and one human plasma experiment. Within each network, peptides derived from the same protein are shown to have a statistically higher topological overlap and concordance in abundance, which is potentially important for inferring protein abundance. The module representatives, called eigenpeptides, correlate significantly with biological phenotypes. Furthermore, within modules, we find significant enrichment for biological function and known interactions (gene ontology and protein-protein interactions).

Conclusions

Biological networks are important tools in the analysis of complex systems. In this paper we evaluate the application of weighted co-expression network analysis to quantitative proteomics data. Protein co-expression networks allow novel approaches for biological interpretation, quality control, inference of protein abundance, a framework for potentially resolving degenerate peptide-protein mappings, and a biomarker signature discovery.

【 授权许可】

   
2013 Gibbs et al.; licensee BioMed Central Ltd.

【 图 表 】

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