Model simulation of PFK-1 and PFK-2 enzyme kinetics

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Cyanobacteria are the only prokaryotes performing oxygenic photosynthesis. Theyhad and have tremendous influence on the biogeochemical cycles on Earth. Recently,cyanobacteria are increasingly investigated as cell factories for a sustainableeconomy. Despite their global, environmental and rising economic importance, ourknowledge on the regulation of their primary metabolism is fragmented.Cyanobacteria switch between photoautotrophic and heterotrophic modes ofmetabolism during day/night cycles or ...

Cyanobacterial PFKs were thought to be ATP dependent, but isolation and characterisation of 2 PFK isoenzymes from Synechocystis revealed that they belong to the PFK-A family, use ADP as phosphate donor and form a separate phylogenetic class. Their allosteric regulation via 3-PG and ATP respectively allow for flexible switching between aactive and inactive enzymes dependent on the light and carbon status.

PFK-1 and PFK-2 were cloned and expressed in E. coli, purified, and kinetically characterised in terms of substrates and allosteric regulators.

Experimental data for kinetic characterisaton of PFK-1 and PFK-2.

Mathematic notebook for enzyme kinetic analysis and model fit, including figure generation for manuscript.