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. 1987 Jan;53(1):65–69. doi: 10.1128/aem.53.1.65-69.1987

Role of Carbon Dioxide in Catabolism of Propane by “Nocardia paraffinicum” (Rhodococcus rhodochrous)

Gregory J MacMichael 1,†, Lewis R Brown 1,*
PMCID: PMC203603  PMID: 16347267

Abstract

The catabolism of propane by “Nocardia paraffinicum” (Rhodococcus rhodochrous) has been shown to involve CO2 fixation after its oxidation to propionic acid. “N. paraffinicum” failed to grow on either propane or 1-propanol in the absence of CO2. The rate of propane utilization was directly related to the initial CO2 concentration, and Warburg respirometry suggested that CO2 was required for the catabolism of 1-propanol, propionaldehyde, and propionate but not for 2-propanol. These data also suggested that the predominant pathway for the utilization of propane by “N. paraffinicum” was through 1-propanol. The use of [2-14C]propane and 14CO2 confirmed the catabolism of propane and the fixation of CO2. Through the use of these isotopes and the pyruvate carboxylase inhibitor sodium arsenite, the labeled 2,4-dinitrophenylhydrazine derivative of pyruvate was trapped and isolated via thin-layer chromatography. The trapping of [14C]pyruvate in this manner was considered to be indicative of the presence of the methylmalonyl coenzyme A pathway for CO2 fixation.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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