M. Hagemann

Using gene complementation to identify a SulP-family bicarbonate transporter in an N2-fixing cyanobacterial endosymbiont of an open ocean diatom

The paper identifies a SulP-family bicarbonate transporter in a cyanobacterial endosymbiont of a diatom using gene complementation in a mutant strain.

Diurnal rhythm causes metabolic crises in the cyanobacterial mutants of c-di-AMP signalling cascade

The paper investigates the role of c-di-AMP and SbtB in cyanobacterial diurnal metabolism, finding that their disruption leads to metabolic dysregulation and diurnal lethality.

PII signal transduction superfamily acts as a valve plug to control bicarbonate and ammonia homeostasis among different bacterial phyla

The paper identifies SbtB as a PII-like protein that acts as a unidirectional valve to control bicarbonate transport via SbtA in cyanobacteria, with similar mechanisms observed in Bacillus for ammonium transport.

Nitrite secretion by cyanobacteria is controlled by the small protein NirP1

This study identifies NirP1 as a regulator of nitrite secretion in cyanobacteria under carbon limitation, revealing its role in coordinating carbon and nitrogen metabolism.

Photosynthetic response of Chara braunii towards different bicarbonate concentrations

This study investigates how Chara braunii uses bicarbonate as a carbon source for photosynthesis, finding short-term utilization but reliance on other mechanisms over time.

Operation of Carbon-Concentrating Mechanisms in Cyanobacteria and Algae requires altered poising of the Calvin-Benson cycle

The paper compares Calvin-Benson cycle metabolite profiles in cyanobacteria and algae with terrestrial plants, finding distinct patterns suggesting the operation of carbon-concentrating mechanisms.

Simultaneous adjustments of major mitochondrial pathways through redox regulation of dihydrolipoamide dehydrogenase (mtLPD1)

The paper shows redox regulation of mtLPD1 modulates photorespiration, TCA-cycle, and BCAA degradation in response to environmental changes.

Expression of the cyanobacterial F0F1 ATP synthase inhibitor Atp{Theta} depends on small basic DNA-binding proteins and differential mRNA stability

This study identifies transcriptional and posttranscriptional regulators of atpT gene expression in Synechocystis sp. PCC 6803, showing mRNA stability is the major factor controlling Atp{Theta} expression under different conditions.

Pyruvate:ferredoxin oxidoreductase and low abundant ferredoxins support aerobic photomixotrophic growth in cyanobacteria

The paper shows that PFOR supports aerobic photomixotrophic growth in cyanobacteria by utilizing ferredoxin instead of NAD(H), saving Gibbs free energy and decelerating metabolism.

Atp{Theta} is an inhibitor of F0F1 ATP synthase to arrest ATP hydrolysis during low-energy conditions in cyanobacteria

This study identifies Atp{Theta} as an inhibitor of F0F1 ATP synthase in cyanobacteria, preventing ATP hydrolysis under low-energy conditions.

Homologs of circadian clock proteins impact the metabolic switch between light and dark growth in the cyanobacterium Synechocystis sp. PCC 6803

This study shows that mutations in circadian clock protein homologs in Synechocystis affect metabolic changes during light-to-dark transitions, with rpaA having a stronger impact on carbon and nitrogen metabolism.

Phycobilisome breakdown effector NblD is required to maintain the cellular amino acid composition during nitrogen starvation

This study shows that NblD is essential for maintaining amino acid and organic acid pools during nitrogen starvation in cyanobacteria by mediating phycobilisome breakdown.

The novel PII-interacting protein PirA regulates flux into the cyanobacterial ornithine-ammonia cycle

This paper identifies PirA, a novel PII-interacting protein that regulates flux into the cyanobacterial ornithine-ammonia cycle by competing with NAGK for PII binding, thereby affecting arginine synthesis and nitrogen storage.

The Novel PII-Interacting Regulator PirC (Sll0944) Identifies 3-Phosphoglycerate Mutase (PGAM) as Central Control Point of Carbon Storage Metabolism in Cyanobacteria

This study identifies PirC as a PII-interacting regulator that inhibits PGAM, controlling carbon flux towards glycogen or polyhydroxybutyrate in cyanobacteria under nitrogen limitation.

Stoichiometry of two plant glycine decarboxylase complexes and comparison with a cyanobacterial glycine cleavage system

This study determines the stoichiometry of plant glycine decarboxylase complexes using mass spectrometry and compares it with the cyanobacterial glycine cleavage system.

Non-canonical localization of RubisCO under high light conditions in the toxic cyanobacterium Microcystis aeruginosa PCC7806

This study shows that microcystin affects RubisCO localization and function in Microcystis aeruginosa under high light, leading to changes in metabolic products and potential microbial interactions.