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MiMeDB 2.0: the Human Microbial Metabolome Database for 2026
Ray Kruger1, Eponine Oler1, Sukanta Saha1,2
1Department of Biological Sciences, University of Alberta, Edmonton, AB T6G 2E9, Canada.
None:
The Microbial Metabolome Database (MiMeDB) (https://mimedb.org) is a comprehensive, freely accessible resource linking human-associated microbes to the metabolites they produce, along with their connections to human health, disease, and diet. Since the release of MiMeDB 1.0 in 2023, the database has been substantially expanded and redesigned. Major updates include the systematic addition of millions of newly annotated genes and pathways, thousands of new metabolites, significantly expanded pathway and reaction coverage, along with broader representation of eukaryotic gut microbes. MiMeDB 2.0 now contains >12.9 million annotated microbial genes, over 23.1 million microbial pathways, 29 295 metabolites, 21 829 metabolic reactions, 3725 microbial species and strains, and 514 076 new experimental and predicted nuclear magnetic resonance and mass spectrometry spectra of microbial metabolites. New features, such as detailed microbial descriptions, metabolite origin tags, refined search filters, and species-specific reaction queries, have been added to enhance usability. Likewise, redesigned network and genome viewers have been implemented to support more comprehensive, intuitive, and integrated visualization of complex, multi-omic relationships. The significant addition of more metabolite spectral data and improved spectral search capabilities further strengthen metabolite identification and discovery. Together, these improvements make MiMeDB 2.0 one of the most comprehensive and user-friendly platforms for investigating the human microbiome at a molecular level and exploring the roles of microbes and microbial metabolites in human health, diet, and disease.
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