Rebecca A. Wilkes, Caroll M. Mendonca, Ludmilla Aristilde
Species of the Pseudomonas genus thrive in various nutritional environments and have strong biocatalytic potential due to their diverse metabolic capabilities. Carbohydrate substrates are ubiquitous both in environmental matrices and in feedstocks for engineered bioconversion. Here, we investigated the metabolic network for carbohydrate metabolism in Pseudomonas protegens Pf-5. Metabolic flux quantitation revealed the relative involvement of different catabolic routes in channeling carbohydrate carbons through a cyclic metabolic network. We also uncovered that mannose catabolism was similar to fructose catabolism, despite the annotation of a different pathway in the genome. Elucidation of the constitutive metabolic network in P. protegens is important for understanding its innate carbohydrate processing, thus laying the foundation for targeting metabolic engineering of this untapped Pseudomonas species.
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