Title
ProbMetab: an R package for Bayesian probabilistic annotation of LC-MS-based metabolomics.
Abstract
We present ProbMetab, an R package that promotes substantial improvement in automatic probabilistic liquid chromatography-mass spectrometry-based metabolome annotation. The inference engine core is based on a Bayesian model implemented to (i) allow diverse source of experimental data and metadata to be systematically incorporated into the model with alternative ways to calculate the likelihood function and (ii) allow sensitive selection of biologically meaningful biochemical reaction databases as Dirichletcategorical prior distribution. Additionally, to ensure result interpretation by system biologists, we display the annotation in a network where observed mass peaks are connected if their candidate metabolites are substrate/ product of known biochemical reactions. This graph can be overlaid with other graph-based analysis, such as partial correlation networks, in a visualization scheme exported to Cytoscape, with web and stand-alone versions.
Year
DOI
Venue
2014
10.1093/bioinformatics/btu019
BIOINFORMATICS
Keywords
Field
DocType
metabolomics,metabolome,mass spectrometry,bayes theorem
Data mining,Metadata,Annotation,Bayesian inference,Likelihood function,Computer science,Inference engine,Bioinformatics,Probabilistic logic,Prior probability,Bayes' theorem
Journal
Volume
Issue
ISSN
30
9
1367-4803
Citations 
PageRank 
References 
3
0.40
16
Authors
8