SEMINAR 31 July 2015: Regulatory mechanisms of CO2 acquisition in cyanobacteria – University of Copenhagen

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29 July 2015

SEMINAR 31 July 2015: Regulatory mechanisms of CO2 acquisition in cyanobacteria

Prof. Martin Hagemann, University Rostock, Dept. Plant Physiology, Einsteinstr. 3, D-18059 Rostock Germany

Abstract

Cyanobacteria invented oxygenic photosynthesis about 3 billion years ago. The CO2 content of their environment changed dramatically leading to limiting CO2 amounts for photosynthesis today.  To grow at the present very low CO2 conditions, cyanobacteria evolved a sophisticated inorganic carbon contracting mechanism (CCM). The expression and activity of the CCM is regulated according to the external CO2 supply. Using metabolomics and transcriptomics, we analyzed changes in the cellular metabolism of model cyanobacteria at sufficient and ambient CO2 conditions. In addition to wild type, we employed several mutants, which have defined defects in genes for regulatory proteins. The aim of the study is to identify signals that allow the cell to recognize the external amount of inorganic carbon. The acclimation to changing CO2 conditions was found to be rather complex, since it employs regulator proteins, non-coding RNAs and distinct metabolic signals to coordinate C- and N-metabolism with growth.

All are welcome. If you wish to meet the speaker individually, please contact Yumiko Sakuragi