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Background   Pseudomonas putida  KT2440 is a metabolically versatile, HV1-certified, genetically accessible, and thus interesting microbial chassis for biotechnological applications. However, its obligate aerobic nature hampers production of oxygen sensitive products and drives up costs in large scale fermentation. The inability to perform anaerobic fermentation has been attributed to insufficient ATP production and an inability to produce pyrimidines under these conditions. Addressing these bottlenecks enabled growth under micro-oxic conditions but does not lead to growth or survival under anoxic conditions.    Results  Here, a data-driven approach was used to develop a rational design for a  P. putida  KT2440 derivative strain capable of anaerobic respiration. To come to the design, data derived from a genome comparison of 1628  Pseudomonas  strains was combined with genome-scale metabolic modelling simulations and a transcriptome dataset of 47 samples representing 14 environmental conditions from the facultative anaerobe  Pseudomonas aeruginosa .    Conclusions  The results indicate that the implementation of anaerobic respiration in  P. putida  KT2440 would require at least 49 additional genes of known function, at least 8 genes encoding proteins of unknown function, and 3 externally added vitamins.

A metabolic and physiological design study of Pseudomonas putida KT2440 capable of anaerobic respiration