The Plant-Like C2 Glycolate Cycle and the Bacterial-Like Glycerate Pathway Cooperate in Phosphoglycolate Metabolism in Cyanobacteria

Eisenhut M, Kahlon S, Hasse D, Ewald R, Lieman-Hurwitz J, Ogawa T, Ruth W, Bauwe H, Kaplan A, Hagemann M (2006)
Plant Physiology 142(1): 333-342.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Autor*in
Eisenhut, MarionUniBi ; Kahlon, Shira; Hasse, Dirk; Ewald, Ralph; Lieman-Hurwitz, Judy; Ogawa, Teruo; Ruth, Wolfgang; Bauwe, Hermann; Kaplan, Aaron; Hagemann, Martin
Abstract / Bemerkung
The occurrence of a photorespiratory 2-phosphoglycolate metabolism in cyanobacteria is not clear. In the genome of the cyanobacterium Synechocystis sp. strain PCC 6803, we have identified open reading frames encoding enzymes homologous to those forming the plant-like C2 cycle and the bacterial-type glycerate pathway. To study the route and importance of 2-phosphoglycolate metabolism, the identified genes were systematically inactivated by mutagenesis. With a few exceptions, most of these genes could be inactivated without leading to a high-CO2-requiring phenotype. Biochemical characterization of recombinant proteins verified that Synechocystis harbors an active serine hydroxymethyltransferase, and, contrary to higher plants, expresses a glycolate dehydrogenase instead of an oxidase to convert glycolate to glyoxylate. The mutation of this enzymatic step, located prior to the branching of phosphoglycolate metabolism into the plant-like C2 cycle and the bacterial-like glycerate pathway, resulted in glycolate accumulation and a growth depression already at high CO2. Similar growth inhibitions were found for a single mutant in the plant-type C2 cycle and more pronounced for a double mutant affected in both the C2 cycle and the glycerate pathway after cultivation at low CO2. These results suggested that cyanobacteria metabolize phosphoglycolate by the cooperative action of the C2 cycle and the glycerate pathway. When exposed to low CO2, glycine decarboxylase knockout mutants accumulated far more glycine and lysine than wild-type cells or mutants with inactivated glycerate pathway. This finding and the growth data imply a dominant, although not exclusive, role of the C2 route in cyanobacterial phosphoglycolate metabolism.
Erscheinungsjahr
2006
Zeitschriftentitel
Plant Physiology
Band
142
Ausgabe
1
Seite(n)
333-342
eISSN
1532-2548
Page URI
https://pub.uni-bielefeld.de/record/2968475

Zitieren

Eisenhut M, Kahlon S, Hasse D, et al. The Plant-Like C2 Glycolate Cycle and the Bacterial-Like Glycerate Pathway Cooperate in Phosphoglycolate Metabolism in Cyanobacteria. Plant Physiology. 2006;142(1):333-342.
Eisenhut, M., Kahlon, S., Hasse, D., Ewald, R., Lieman-Hurwitz, J., Ogawa, T., Ruth, W., et al. (2006). The Plant-Like C2 Glycolate Cycle and the Bacterial-Like Glycerate Pathway Cooperate in Phosphoglycolate Metabolism in Cyanobacteria. Plant Physiology, 142(1), 333-342. https://doi.org/10.1104/pp.106.082982
Eisenhut, Marion, Kahlon, Shira, Hasse, Dirk, Ewald, Ralph, Lieman-Hurwitz, Judy, Ogawa, Teruo, Ruth, Wolfgang, Bauwe, Hermann, Kaplan, Aaron, and Hagemann, Martin. 2006. “The Plant-Like C2 Glycolate Cycle and the Bacterial-Like Glycerate Pathway Cooperate in Phosphoglycolate Metabolism in Cyanobacteria”. Plant Physiology 142 (1): 333-342.
Eisenhut, M., Kahlon, S., Hasse, D., Ewald, R., Lieman-Hurwitz, J., Ogawa, T., Ruth, W., Bauwe, H., Kaplan, A., and Hagemann, M. (2006). The Plant-Like C2 Glycolate Cycle and the Bacterial-Like Glycerate Pathway Cooperate in Phosphoglycolate Metabolism in Cyanobacteria. Plant Physiology 142, 333-342.
Eisenhut, M., et al., 2006. The Plant-Like C2 Glycolate Cycle and the Bacterial-Like Glycerate Pathway Cooperate in Phosphoglycolate Metabolism in Cyanobacteria. Plant Physiology, 142(1), p 333-342.
M. Eisenhut, et al., “The Plant-Like C2 Glycolate Cycle and the Bacterial-Like Glycerate Pathway Cooperate in Phosphoglycolate Metabolism in Cyanobacteria”, Plant Physiology, vol. 142, 2006, pp. 333-342.
Eisenhut, M., Kahlon, S., Hasse, D., Ewald, R., Lieman-Hurwitz, J., Ogawa, T., Ruth, W., Bauwe, H., Kaplan, A., Hagemann, M.: The Plant-Like C2 Glycolate Cycle and the Bacterial-Like Glycerate Pathway Cooperate in Phosphoglycolate Metabolism in Cyanobacteria. Plant Physiology. 142, 333-342 (2006).
Eisenhut, Marion, Kahlon, Shira, Hasse, Dirk, Ewald, Ralph, Lieman-Hurwitz, Judy, Ogawa, Teruo, Ruth, Wolfgang, Bauwe, Hermann, Kaplan, Aaron, and Hagemann, Martin. “The Plant-Like C2 Glycolate Cycle and the Bacterial-Like Glycerate Pathway Cooperate in Phosphoglycolate Metabolism in Cyanobacteria”. Plant Physiology 142.1 (2006): 333-342.
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