Volume 2 Supplement 1

5th German Conference on Cheminformatics: 23. CIC-Workshop

Open Access

Expanding and understanding metabolite space

  • Julio E Peironcely1,
  • Andreas Bender2,
  • M Rojas-Chertó2,
  • T Reijmers2,
  • L Coulier1 and
  • T Hankemeier2
Journal of Cheminformatics20102(Suppl 1):P39

https://doi.org/10.1186/1758-2946-2-S1-P39

Published: 04 May 2010

In metabolomics the identity and role of low mass molecules called metabolites that are produced in cell metabolic processes are investigated. These make them valuable indicators of the phenotype of a biological system. The 'Metabolite Space' is the total chemical universe of metabolites present in all compartments and in all states from any organism. These molecules exhibit common features that form what can be called 'metabolite likeness'. Here, we focus on the human metabolite space, including both endogenous and exogenous (such as drug) metabolites. In order to analyze the 'Metabolite Space', we collected data from the Human Metabolome Database (HMDB) [1] which is a comprehensive database for human metabolites containing over 7000 compounds that were identified in several human biofluids and tissues. As there still remain many compounds to be identified that lay outside the boundaries of this known space, exploring this unknown region is crucial to evaluate 'metabolite likeness'.

In order to expand 'Metabolite Space' in our approach we employed the Retrosynthetic Combinatorial Analysis Procedure (RECAP) [2] to generate new molecules that possess features similar to those present in metabolites, however in other (but still likely) rearrangements. We studied how discernible these new molecules are from real metabolites and, hence, whether synthetic organic chemistry reactions are indeed able to expand the known universe of metabolites. We further studied the new chemistry present in the expanded metabolite space by looking at Murcko assemblies [3], ring systems and other chemical properties. The new metabolite space is compared to other small molecules, such as those obtained from the ZINC database, that are not metabolites. By combining all the above analyses we expect to characterize better the metabolite space, and furthermore, to predict the metabolite-likeness of a molecule and to understand its immanent properties.

Authors’ Affiliations

(1)
TNO, Quality of Life
(2)
Netherlands Metabolomics Centre, University of Leiden, LACDR

References

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  3. Bemis GW, Murcko MA: J Med Chem. 1996, 39: 2887-2893. 10.1021/jm9602928.View ArticleGoogle Scholar

Copyright

© Julio E et al; licensee BioMed Central Ltd. 2010

This article is published under license to BioMed Central Ltd.