Zinc is required for the activity of many enzymes and plays an essential role in gene regulation and redox homeostasis. In Anabaena ( Nostoc ) sp. PCC7120, the genes involved in zinc uptake and transport are controlled by the metalloregulator Zur (FurB). Comparative transcriptomics of a zur mutant (Δ zur ) with the parent strain unveiled unexpected links between zinc homeostasis and other metabolic pathways. A notable increase...

Summary Microcystins are toxins produced by cyanobacteria that entail serious health and environmental problems. They are cyclic heptapeptides synthesized via a mixed polyketide synthase/non‐ribosomal peptide synthetase system called microcystin synthetase. Environmental and nutritional factors that trigger microcystin synthesis are still debated and this work deals with the study of the influence of iron nutritional status on...