About the Human Metabolome Database
What is the HMDB?
The simple text query (above) supports general text queries of the entire textual component of the database. Clicking on the Browse menu header (on the HMDB navigation panel above) generates a tabular synopsis of the HMDB's content. This browse view allows users to casually scroll through the database or re-sort its contents. Clicking on a given HMDB ID brings up the full data content for the corresponding metabolite. The Biofluids link in the Browse menu generates hyperlinked tables listing normal and abnormal concentrations of different metabolites for 23 different biofluids. In the Search menu, the ChemQuery Structure Search link allows users to draw (using a ChemSketch applet) or write (using a SMILES string) a chemical compound and to search HMDB for chemicals similar or identical to the query compound. The Text Query supports a more sophisticated text search (partial word matches, case sensitive, misspellings, etc.) of the text portion of HMDB. The Sequence Search allows users to conduct BLAST sequence searches of the over 5,701 gene and protein sequences contained in HMDB. Both single and multiple sequence BLAST queries are supported. The Advanced Search link opens an easy-to-use relational query search tool that allows users to select or search over various combinations of subfields. The Advanced Search is the most sophisticated search tool for HMDB. The MS Search allows users to submit Mass spectral files (MoverZ format) that will be searched against the HMDB's library of MS/MS spectra. This allows the identification of metabolites from mixtures via MS/MS spectroscopy. The 1D and 2D NMR Searches allow users to submit peak lists from 1H or 13C NMR spectra (both pure and mixtures) or 2D TOCSY or 13C HSQC spectra, respectively, and to have these spectra compared to the NMR libraries contained in the HMDB. This allows the identification of metabolites from mixtures via NMR spectroscopy. The Downloads link provides links to collected sequence, image and text files associated with the HMDB. The HML Home button links to the Human Metabolome Library (HML) home page. The HML lists metabolites that can be ordered for a fee by researchers around the world. Finally, under the About menu there are links for HMDB Statistics, and information about the Data Sources used to assemble the HMDB.
Citing the HMDB
HMDB is offered to the public as a freely available resource. Use and re-distribution of the data, in whole or in part, for commercial purposes requires explicit permission of the authors and explicit acknowledgment of the source material (HMDB) and the original publication (see below). We ask that users who download significant portions of the database cite the HMDB paper in any resulting publications.
- Wishart DS, Tzur D, Knox C, et al., HMDB: the Human Metabolome Database. Nucleic Acids Res. 2007 Jan;35(Database issue):D521-6. 17202168
- Wishart DS, Knox C, Guo AC, et al., HMDB: a knowledgebase for the human metabolome. Nucleic Acids Res. 2009 37(Database issue):D603-610. 18953024
- Wishart DS, Jewison T, Guo AC, Wilson M, Knox C, et al., HMDB 3.0 — The Human Metabolome Database in 2013. Nucleic Acids Res. 2013. Jan 1;41(D1):D801-7. 23161693