The photorespiratory glycolate metabolism is essential for cyanobacteria and might have been conveyed endosymbiontically to plants

Eisenhut M, Ruth W, Haimovich M, Bauwe H, Kaplan A, Hagemann M (2008)
Proceedings of the National Academy of Sciences 105(44): 17199-17204.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Autor*in
Eisenhut, MarionUniBi; Ruth, Wolfgang; Haimovich, Maya; Bauwe, Hermann; Kaplan, Aaron; Hagemann, Martin
Abstract / Bemerkung
Photorespiratory 2-phosphoglycolate (2PG) metabolism is essential for photosynthesis in higher plants but thought to be superfluous in cyanobacteria because of their ability to concentrate CO2internally and thereby inhibit photorespiration. Here, we show that 3 routes for 2PG metabolism are present in the model cyanobacteriumSynechocystissp. strain PCC 6803. In addition to the photorespiratory C2 cycle characterized in plants, this cyanobacterium also possesses the bacterial glycerate pathway and is able to completely decarboxylate glyoxylate via oxalate. A triple mutant with defects in all 3 routes of 2PG metabolism exhibited a high-CO2-requiring (HCR) phenotype. All these catabolic routes start with glyoxylate, which can be synthesized by 2 different forms of glycolate dehydrogenase (GlcD). Mutants defective in one or both GlcD proteins accumulated glycolate under high CO2level and the double mutant ΔglcD1glcD2was unable to grow under low CO2. The HCR phenotype of both the double and the triple mutant could not be attributed to a significantly reduced affinity to CO2, such as in other cyanobacterial HCR mutants defective in the CO2-concentrating mechanism (CCM). These unexpected findings of an HCR phenotype in the presence of an active CCM indicate that 2PG metabolism is essential for the viability of all organisms that perform oxygenic photosynthesis, including cyanobacteria and C3 plants, at ambient CO2conditions. These data and phylogenetic analyses suggest cyanobacteria as the evolutionary origin not only of oxygenic photosynthesis but also of an ancient photorespiratory 2PG metabolism.
Erscheinungsjahr
2008
Zeitschriftentitel
Proceedings of the National Academy of Sciences
Band
105
Ausgabe
44
Seite(n)
17199-17204
ISSN
0027-8424
eISSN
1091-6490
Page URI
https://pub.uni-bielefeld.de/record/2968471

Zitieren

Eisenhut M, Ruth W, Haimovich M, Bauwe H, Kaplan A, Hagemann M. The photorespiratory glycolate metabolism is essential for cyanobacteria and might have been conveyed endosymbiontically to plants. Proceedings of the National Academy of Sciences. 2008;105(44):17199-17204.
Eisenhut, M., Ruth, W., Haimovich, M., Bauwe, H., Kaplan, A., & Hagemann, M. (2008). The photorespiratory glycolate metabolism is essential for cyanobacteria and might have been conveyed endosymbiontically to plants. Proceedings of the National Academy of Sciences, 105(44), 17199-17204. https://doi.org/10.1073/pnas.0807043105
Eisenhut, Marion, Ruth, Wolfgang, Haimovich, Maya, Bauwe, Hermann, Kaplan, Aaron, and Hagemann, Martin. 2008. “The photorespiratory glycolate metabolism is essential for cyanobacteria and might have been conveyed endosymbiontically to plants”. Proceedings of the National Academy of Sciences 105 (44): 17199-17204.
Eisenhut, M., Ruth, W., Haimovich, M., Bauwe, H., Kaplan, A., and Hagemann, M. (2008). The photorespiratory glycolate metabolism is essential for cyanobacteria and might have been conveyed endosymbiontically to plants. Proceedings of the National Academy of Sciences 105, 17199-17204.
Eisenhut, M., et al., 2008. The photorespiratory glycolate metabolism is essential for cyanobacteria and might have been conveyed endosymbiontically to plants. Proceedings of the National Academy of Sciences, 105(44), p 17199-17204.
M. Eisenhut, et al., “The photorespiratory glycolate metabolism is essential for cyanobacteria and might have been conveyed endosymbiontically to plants”, Proceedings of the National Academy of Sciences, vol. 105, 2008, pp. 17199-17204.
Eisenhut, M., Ruth, W., Haimovich, M., Bauwe, H., Kaplan, A., Hagemann, M.: The photorespiratory glycolate metabolism is essential for cyanobacteria and might have been conveyed endosymbiontically to plants. Proceedings of the National Academy of Sciences. 105, 17199-17204 (2008).
Eisenhut, Marion, Ruth, Wolfgang, Haimovich, Maya, Bauwe, Hermann, Kaplan, Aaron, and Hagemann, Martin. “The photorespiratory glycolate metabolism is essential for cyanobacteria and might have been conveyed endosymbiontically to plants”. Proceedings of the National Academy of Sciences 105.44 (2008): 17199-17204.
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