Abstract
External factors affecting the activity of isocitrate lyase (ICL) in Rhodobacter capsulatus B10 grown under controlled photoheterotrophic anaerobic conditions were investigated. The activity of this enzyme was found to depend on the history of the inoculum and on the growth phase on acetate medium. Intracellular degradation of ICL under unfavorable conditions was shown. However, transition of the growing culture from acetate to lactate did not result in active degradation of the enzyme. When transferred to acetate, Rba. capsulatus could grow without the lag phase and did not exhibit ICL activity, suggesting another anaplerotic pathway in Rba. capsulatus cells. Since emergence of the ICL activity in the cells grown on acetate results in an increase in its growth rate, the glyoxylate bypass plays an important role in acetate metabolism of Rba. Capsulatus.
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Original Russian Text © E.P. Petushkova, A.A. Tsygankov, 2011, published in Mikrobiologiya, 2011, Vol. 80, No. 5, pp. 606–611.
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Petushkova, E.P., Tsygankov, A.A. Major factors affecting isocitrate lyase activity in Rhodobacter capsulatus B10 under phototrophic conditions. Microbiology 80, 619–623 (2011). https://doi.org/10.1134/S0026261711050092
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DOI: https://doi.org/10.1134/S0026261711050092