Integration of Carbon and Nitrogen Metabolism with Energy Production Is Crucial to Light Acclimation in the Cyanobacterium Synechocystis

摘要: Light drives the production of chemical energy and reducing equivalents in photosynthetic organisms required for assimilation essential nutrients. This process also generates strong oxidants reductants that can be damaging to cellular processes, especially during absorption excess excitation energy. Cyanobacteria, like other oxygenic organisms, respond increases energy, such as exposure cells high light (HL) by reduction antenna size photosystem content. However, mechanism how Synechocystis sp. PCC 6803, a cyanobacterium, maintains redox homeostasis coordinates various metabolic processes under HL stress remains poorly understood. In this study, we have utilized time series transcriptome data elucidate global responses HL. Identification differentially regulated genes involved regulation, protection, maintenance has offered important insights into optimized response Our results indicate comprehensive integrated homeostatic interaction between (photosynthesis) consumption (assimilation carbon nitrogen). addition, measurements physiological parameters different growth conditions showed integration two is not consequence limitations external nitrogen levels available cells. We discovered existence novel glycosylation pathway, date known an nutrient sensor only eukaryotes. Up-regulation gene encoding rate-limiting enzyme hexosamine pathway suggests regulatory role protein