MicroMap: a network visualisation resource for human microbiome metabolism

The human microbiome critically influences metabolism and thereby our health. Constraint-based reconstruction and analysis (COBRA) is a proven framework for generating mechanism-derived hypotheses along the nutrition-host-microbiome-disease axis. However, no large-scale microbiome metabolism visualisation has been available. Therefore, we created the MicroMap, a manually curated network visualisation, which captures the metabolism of over a quarter million microbial genome-scale metabolic reconstructions. The MicroMap contains 5064 unique reactions and 3499 unique metabolites, including for 98 drugs. Users can intuitively explore microbiome metabolism, inspect metabolic capabilities, and visualise computational modelling results. Further, the MicroMap may serve as an educational tool to help diversify the computational modelling community. We generated 257,429 visualisations, covering all our current microbiome reconstructions, to visually compare metabolic capabilities between microbes. The MicroMap integrates with the Virtual Metabolic Human (VMH, www.vmh.life ), the COBRA Toolbox (https://opencobra.github.io ), and is freely accessible at the MicroMap dataverse ( https://dataverse.harvard.edu/dataverse/micromap ), along with all the generated reconstruction visualisations.