Constraint-Based Metabolic Modeling Approach for Microbial Communities

Microorganisms grow in complex communities by fostering symbiotic relationships to uphold the integrity and functionality of the consortium. Deciphering the metabolic interactions within microbial communities and their impact on host environments is essential due to their association with major domains, including human health, bioremediation, and bioenergy production. However, unraveling their metabolic activity in laboratory conditions is challenging, as many microbes resist cultivation, and recreating their complex natural ecosystem with all its biological parameters presents additional hurdles. Therefore, modeling the microbial communities has become crucial for comprehending the intricate interactions within diverse microbial populations. In this chapter, we elucidate an in silico methodology for reconstructing a genome-scale metabolic model of a microbial consortium. This community modeling approach encompasses the reconstruction of microbial models, the integration of individual models into a community, and the optimization of the community model under different environmental conditions. Furthermore, a wide range of flux analysis techniques, like Flux Balance Analysis (FBA), Flux Variability Analysis (FVA), and Flux Sampling (FS), were described to investigate both the community-wide flux profile and intermicrobial interactions.