MetaMapR: Pathway independent metabolomic network analysis incorporating unknowns

Dmitry Grapov, Kwanjeera Wanichthanarak, Oliver Fiehn

Research output: Contribution to journalArticlepeer-review

72 Scopus citations


Metabolic network mapping is a widely used approach for integration of metabolomic experimental results with biological domain knowledge. However, current approaches can be limited by biochemical domain or pathway knowledge which results in sparse disconnected graphs for real world metabolomic experiments. MetaMapR integrates enzymatic transformations with metabolite structural similarity, mass spectral similarity and empirical associations to generate richly connected metabolic networks. This open source, web-based or desktop software, written in the R programming language, leverages KEGG and PubChem databases to derive associations between metabolites even in cases where biochemical domain or molecular annotations are unknown. Network calculation is enhanced through an interface to the Chemical Translation System, which allows metabolite identifier translation between >200 common biochemical databases. Analysis results are presented as interactive visualizations or can be exported as high-quality graphics and numerical tables which can be imported into common network analysis and visualization tools. Availability and Implementation: Freely available at Requires R and a modern web browser. Installation instructions, tutorials and application examples are available at

Original languageEnglish (US)
Pages (from-to)2757-2760
Number of pages4
Issue number16
StatePublished - Jan 19 2015

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology
  • Computational Theory and Mathematics
  • Computer Science Applications
  • Computational Mathematics
  • Statistics and Probability


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