The photosynthetic green alga Chlamydomonas reinhardtii is capable of performing a complex fermentative metabolism which is related to the mixed acid fermentation of bacteria such as Escherichia coli. The fermentative pattern includes the products formate, ethanol, acetate, glycerol, lactate, carbon dioxide and molecular hydrogen (H2). H2 production is catalysed by an active [Fe]-hydrogenase (HydA) which is coupled with the photosynthetic electron-transport chain. The most important enzyme of the classic fermentation pathway is pyruvate formate-lyase, which is common in bacteria but seldom found in eukaryotes. An interaction between fermentation, photosynthesis and H2 evolution allows the algae to overcome long periods of anaerobiosis. In the absence of sulphur, the cells establish a photofermentative metabolism and accumulate large amounts of H2.
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Conference Article|
February 01 2005
The exceptional photofermentative hydrogen metabolism of the green alga Chlamydomonas reinhardtii
A. Hemschemeier;
A. Hemschemeier
1Ruhr-Universität-Bochum, Fakultät für Biologie, Biochemie der Pflanzen, AG Photobiotechnologie, 44780 Bochum, Germany
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T. Happe
T. Happe
1
1Ruhr-Universität-Bochum, Fakultät für Biologie, Biochemie der Pflanzen, AG Photobiotechnologie, 44780 Bochum, Germany
1To whom correspondence should be addressed (email thomas.happe@rub.de).
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Publisher: Portland Press Ltd
Received:
September 29 2004
Online ISSN: 1470-8752
Print ISSN: 0300-5127
© 2005 The Biochemical Society
2005
Biochem Soc Trans (2005) 33 (1): 39–41.
Article history
Received:
September 29 2004
Citation
A. Hemschemeier, T. Happe; The exceptional photofermentative hydrogen metabolism of the green alga Chlamydomonas reinhardtii. Biochem Soc Trans 1 February 2005; 33 (1): 39–41. doi: https://doi.org/10.1042/BST0330039
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