Calcium Ions and a Secreted Peroxidase in Euphorbia characias Latex are Made for Each Other

Francesca Pintus1, Delia Spanò1, Rosaria Medda1, Giovanni Floris1,2
1Department of Applied Sciences in Biosystems, University of Cagliari, Cagliari, Italy
2Dipartimento di Scienze Applicate ai Biosistemi, Cittadella Universitaria, Monserrato, Italy

Tóm tắt

This minireview deals of a protein, a class III secreted peroxidase, present as unique isoform in the latex of the perennial Mediterranean shrub Euphorbia characias. The paper reports on the molecular properties, on the structures (primary, secondary and tertiary), and on the catalytic mechanism of this enzyme. Here is also reported the extraordinary effect of calcium ions on the structure and on the enzyme activity of Euphorbia peroxidase. These ions can either enhance the catalytic efficiency of the enzyme toward some substrates or can regulate the ability of the enzyme to execute different metabolic pathways toward the same substrate. This review will give a valuable reference to the peroxidase fans and the general readers will find many thorough suggestions for future researches giving birth to new studies and important discoveries.

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